XP18HPX - Generator DuroMax - Free user manual and instructions

USER MANUAL XP18HPX DuroMax

Blue Duro Max fuel engine with black and white components, no visible text or symbols on the device itself.

REV: XP18HPX_rev04082022

This manual provides information regarding the operation and maintenance of these products. We have made every effort to ensure the accuracy of the information in this manual. We reserve the right to change this product at any time without prior notice.

5800 Ontario Mills Pkwy

Ontario, CA 91764 USA

www.duromaxpower.com

Call our Customer Care Team Toll Free 8-5 pm PST Mon-Fri

844-DUROMAX

Pure blue square with no text, numbers, or symbols

Pure blue square with no text, numbers, or symbols

Pure blue square with no text, numbers, or symbols

1. Introduction

Introduction 6

General Safety Procedures....8

Unit and Purchase Information.... 12

Engine Components 13

Package Contents 14

2. Engine Setup

Adding Oil 17

Connect the Battery.... 18

Adding Gasoline 19

High Altitude Operation 20

3. Starting the Engine

Check the Oil 22

Check the Gas Level.... 23

Starting the Engine Using Gasoline.... 24

Starting the Engine Using Propane.... 26

Starting the Engine Using the Recoil Start 30

4. Maintenance and Care

Maintenance Schedule.... 34

Break-In Period 35

Maintenance Log.... 35

Checking the Oil 36

Changing the Oil.... 37

Changing the Air Filter 38

Spark Plug Maintenance 40

Removing the Propane Hose.... 42

Emptying the Gas Tank 44

Storing the Engine for Same Day Use 46

Storing the Engine for Use Within 30 Days.... 47

Storing the Engine for Longer Than 30 Days.... 48

CONTENTS

5. Specifications

Specifications.... 53

Adjustment, Torque, and Timing Specifications 54

Engine Diagrams 55

Wiring Diagram 57

6. Troubleshooting....61

7. Warranty....64

8. Customer Service....68

Duro

NEXT GENERATION

Max

POWER SYSTEMS

POWERING EVERYONE...

ANYWHERE!

THE DUROMAX WAY

The DuroMax Way is more than just a brand, it is our understanding and appreciation of just how important power can be to someone without it...

Family of four sitting on stone steps, smiling and interacting (no text or symbols visible)

DUROMAX FOR HOME

Electricity in our home not only provides comfort but safety as well. From keeping the heat or A/C on to keeping our food cold, power is essential to our daily lives. Inevitability when disaster strikes and we are left without power for a prolonged period of time, our way of life is put at risk. This is by far the most critical time for reliable portable power.

Two construction workers in hard hats and casual clothing working on a steel structure (no visible text or symbols)

DUROMAX FOR WORK

On the job site, portable power allows you the ability to get work done in remote locations when traditional power sources are usually unavailable. Equipment like table saws, sanders, and work lights are a necessity and portable power can play a critical role in getting a job done successfully and efficiently.

Family of four sitting outdoors near a campfire, with a camouflaged vehicle in the background (no visible text or symbols)

DUROMAX FOR PLAY

Camping outdoors in a remote location can get one in touch with nature and allow them to forget the stress of the day to day grind. Here portable power can provide comfort as well as safety. With portable power, you can keep your cell phone charged, light up your campsite, or even brew a cup of coffee, all while being miles from civilization.

The DuroMax Way is a commitment to excellence. This vision is focused on the quality, reliability, and durability of our products combined with outstanding customer service. We understand that having dependable power whenever and wherever you need it provides comfort, safety, and peace of mind. It is through this philosophy that DuroMax achieves our vision of...

POWERING EVERYONE... ANYWHERE!

INTRODUCTION

DuroMax Power Equipment is headquartered in Ontario, California and is the industry's leader in Dual Fuel portable generator technology. In addition to a full assortment of portable generators ranging from digital inverters to large 15,000-watt portable standby units, their product line includes pressure washers, engines, pumps, and accessories.

The foundation of our company is built on quality, reliability, durability, and customer service. At DuroMax our vision is simple, we are committed to Powering Everyone... Anywhere!

Duro NEXT GENERATION Max POWER SYSTEMS

DUAL FUEL

STOP

Please do not return to the store.

DuroMax representatives are ready to help you with any questions, concerns, or issues about your new product. We can guide you through assembly, start up, and how to operate your new generator. We want you to be able to put your new generator to use right away!

CALL US BEFORE YOU CONSIDER RETURNING THE PRODUCT!

TOLL-FREE 1-844-DUROMAX

Notice Regarding Emissions

Engines that are certified to comply with U.S. EPA emission regulations for SORE (Small off Road Equipment), are certified to operate on regular unleaded gasoline and may include the following emission control systems: (EM) Engine Modifications and (TWC) Three-Way Catalyst (if so equipped).

GENERAL SAFETY PROCEDURES

SAFETY ALERT SYMBOL

The safety alert symbol is used with one of the safety words (DANGER, WARNING, or CAUTION) to alert you of hazards. Please pay attention to these hazard notices both in this manual and on the engine.

Please familiarize yourself with the following safety symbols and words:

• DANGER: Indicates a hazard that will result in serious injury or death if instructions are not followed.
• WARNING: Indicates a strong possibility of causing serious injury or death if instructions are not followed.
• CAUTION: Indicates a possibility of personal injury or equipment damage if instructions are not followed.

DANGER: This engine produces poisonous carbon monoxide gas when running. This gas is both odorless and colorless. Even if you do not see or smell gas, carbon monoxide may still be present. Breathing this poison can lead to headaches, dizziness, drowsiness, and eventually death.

• Use outdoors ONLY in non-confined areas.
- Keep several feet of clearance on all sides to allow proper ventilation of the engine.

WARNING: The exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.

WARNING: This engine produces heat when running. Temperatures near exhaust can exceed 150^ F ( 65^ C).

• Do not touch hot surfaces. Pay attention to warning labels on the engine denoting hot parts of the machine.
• Allow engine to cool several minutes after use before touching engine or areas which heat during use.

WARNING: This engine may emit highly flammable and explosive gasoline vapors, which can cause severe burns or even death. A nearby open flame can lead to an explosion even if not directly in contact with gasoline.

- Do not operate near an open flame.

- Do not smoke near the engine.

• Always operate on a firm, level surface.

• Always turn the engine off before refueling.

- Allow engine to cool for at least 2 minutes before removing the fuel cap. Loosen cap slowly to relieve pressure in the tank.

- Do not overfill the gas tank. Gas may expand during operation. Do not fill to the top of the tank.

• Always check for spilled gas before operating.

• Empty the gasoline tank before storing or transporting the engine.

- Before transporting, turn the fuel valve to the off position and disconnect the spark plug.

GENERAL SAFETY PROCEDURES (CONTINUED)

In addition to the above safety notices, please familiarize yourself with the safety and hazard markings on the engine.

DANGER HOT EXHAUST KEEP SAFE DISTANCE DON'T BURN RISK CABBON WONDISE SAFE DISTANCE TOUCH DANGER FOR DUCTURE FOR SAFETY FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE FOR SALE

DANGER

Using power equipment indoors CAN KILL YOU IN MINUTES.

Power equipment exhaust contains carbon monoxide. This is a poison you cannot see or smell.

NEVER use inside a home or garage, EVEN IF doors and windows are open.

Only use OUTSIDE and far away from windows, doors, and vents.

ATTENTION CHECK ENGINE OIL LEVEL BEFORE EACH START CAPACITY: 1.1L/37oz (US) 30wt ATTENTION CHECK ENGINE OIL LEVEL BEFORE EACH START CAPACITY: 1.1L/37oz (US) 30wt WARNING Check that there is no fuel spillage or fuel leakage. Engine must be off before fueling. WARNING Check that there is no fuel spillage or fuel leakage. Engine must be off before fueling.

UNIT AND PURCHASE INFORMATION

Serial Number

Close-up of an electric motor internal components, showing wiring, motors, and a highlighted orange button (no text or symbols visible)

Serial number

The serial number is located on the engine block, to the left of the oil fill.

☆R440N☆ ☆A1912100002☆

Serial number format

The serial number will be shown in two parts. The engine model, followed by the serial number.

Engine Model:

Serial Number: ____

STAPLE RECEIPT HERE

A purchase receipt may be necessary for warranty parts or service in the future. If you have a paper receipt staple it here for easy reference.

If you purchased the unit online, save the email receipt where you can access it, and record your details here for convenience in the future.

Purchase Date: ____

Order Number: ____

Retailer Name: ____

■ ENGINE COMPONENTS

1. Propane Regulator 2. Air Filter 3. Carburetor 4. Fuel Tank 5. Recoil Starter 6. Key Switch Box 7. Recoil Handle 8. Starter Motor 9. Muffler 10. Engine Shaft 11. Oil Fill 12. Oil Drain Plug

1. Propane Regulator - A propane regulator with included hose that easily installs on a propane tank.
2. Air Filter - A removable, cleanable, oiled, element that cleans the air going into the engine.
3. Carburetor - A component used to control the air fuel mixture of the engine.
4. Fuel Tank - All metal 1.4 gallon gasoline fuel tank.
5. Recoil Starter - An easy pull recoil start to start the engine without the electric start.
6. Key Switch Box - An electric start switch that engages the starter motor with the turn of a key.
7. Recoil Handle - An easy grip handle used to pull the recoil starter rope.
8. Starter Motor - Electric motor that starts the generator electrically for easy starting.
9. Muffler - A noise dampening component that helps lower the engine decibel level.
10. Engine Shaft - A 1" diameter, 2-3/4" long all metal shaft with a 1/4" keyway.
11. Oil Fill - An easy access location to fill the oil for the engine.
12. Oil Drain Plug - An easy to remove oil plug that is used to drain the oil.

PACKAGE CONTENTS

Your engine comes with the items listed below. Please check to see that all of the following items are included with your engine.

Two metallic cylindrical metal rods, one upright and one straight, with no visible text or markings.

Simple curved line drawing resembling a stylized tool or tool (no text or symbols)

Two black keys with metallic handles, one open and one closed (no text or symbols visible)

Spark Plug Wrench Oil Funnel Engine Keys

Used in spark plug maintenance, inspection, and installation.

Used to add oil to the engine without messy spills.

Used to start the engine.

Coiled industrial cable with metal clamps and connectors (no visible text or symbols)

Battery Leads

Used to hook up a 12V battery to the starter motor.

Note: Actual tools may differ in appearance or design from image shown.

Blue DUAL FUEL XPT800PX hydraulic cylinder with attached valve and control panel (no visible text beyond branding)

ENGINE SETUP

Proper setup of your engine will get you going as soon as possible while making sure you and your equipment are safe and cared for.

Duro

NEXT GENERATION

Max

POWER SYSTEMS

POWERING EVERYONE...

ANYWHERE!

Step 1- Adding Oil

The engine requires engine oil to operate properly. The engine, when new from the package contains no oil in the crankcase*. You must add the proper amount of oil before operating the engine for the first time. This amount is equal to the oil capacity of the engine crankcase:

Model Number XP18	HPX
Engine Oil Capacity 37.2 fl. oz (1.1L)

WARNING: Do not apply engine oils with additives or 2-stroke gasoline engine oils; they don't have enough lubrication and may shorten the engine's service life.

Close-up of a mechanical assembly with visible components and wiring (no text or symbols)

Close-up of a metallic pipe fitting with a yellow liquid inside, no visible text or symbols

Engine oil recommended: SAE 10W-30.

Viscosity varies with regions and temperatures. Choose your oil viscosity using the chart to the left.

* A small amount of oil from factory testing may be present on arrival.
* Synthetic oil may be used after the 8 hour initial break-in period. Using synthetic oil does not increase the recommended oil change interval. Full synthetic 5W-30 oil will aid in starting in cold temperatures < 5^ (41°F).

1. Add oil

a. Make sure the engine is on a level surface.
b. Unscrew the oil filler cap from the engine.
c. Using a funnel, add the appropriate amount of oil into the crankcase. You can check the oil level of the engine with the dipstick located below the oil filler cap. Simply pull the dipstick out and the indicated oil level is on the end of the stick.
d. Replace oil filler cap.

WARNING: DO NOT overfill the crankcase. This may damage the motor and shorting overall life of your engine.

ENGINE SETUP (CONTINUED)

Step 2 - Connect the Battery

Close-up of a mechanical assembly with red and black components, no visible text or symbols

1. Connect positive battery lead

a. Remove the outer nut of the starter solenoid and slide the ring terminal end of the red positive lead over the outer solenoid bolt.

b. Reinstall outer nut on starter solenoid outer bolt.

Close-up of a hand holding a wrench next to a black cable with white insulation, mounted on a mechanical component (no visible text or symbols)

2. Connect negative battery lead

a. Connect the ring terminal end of the black negative battery lead to any bolt location on the non-painted metal engine casting.

Exterior view of a black rectangular battery with visible cooling fins and terminal blocks (no text or symbols)

3. Connect both leads to battery.

a. First slide the positive battery terminal clamp lead end to a 12V battery positive terminal and tighten the battery terminal clamp.

b. Thentakethenegative battery terminal clamplead end to a 12V battery positive terminal and tighten the battery terminal clamp.

Step 3 - Adding Gasoline (Optional)

Person pouring liquid into a blue industrial container with a red container nearby (no visible text or symbols)

Add gasoline

a. Make sure the engine is on a level surface.

b. Unscrew gas cap and set aside (NOTE: the gas cap may be tight and hard to unscrew).

c. Slowly add unleaded gasoline to the fuel tank. Be careful not to overfill.

d. Replace fuel cap and wipe up any spilled gasoline with a dry cloth.

Model Number XP18HPX
Gas Tank Capacity 1.4	US gal. (5.325 L)

DANGER DO NOT OVERFILL THE GAS TANK 1.5" OVERFILLING CAN RESULT IN A FIRE, EXPLOSION, OR DEATH.

WARNING: Gas can expand. Do not fill the gas tank to the very top. Leave a minimum of 1.5 in open space. Gasoline and gas fumes are highly flammable. Do not fill the tank near an open flame. Always check for fuel spills.

IMPORTANT:

• To ensure that the engine runs smoothly use only FRESH, UNLEADED GAS WITH AN OCTANE RATING OF 87 OR HIGHER.

- Never use an oil/gasoline mixture. Never use old gas.

- Avoid getting dirt or water in the fuel tank.

Gas can age in the tank and make it hard to start up the engine in the future.

• Never store engine for extended periods of time with fuel in the tank.

■ ENGINE SETUP (CONTINUED)

High Altitude Operation

At high altitudes, the standard carburetor air/fuel mixture will be too rich. The performance will decrease, and fuel consumption will increase. A very rich mixture will also foul the spark plug and cause hard starting. Operation at an altitude that differs from that at which this engine was certified, for extended periods of time, may increase emissions. High altitude performance can be improved by specific modifications to the carburetor. If you always operate your engine at altitudes above 3,000 feet (900 meters), have a dealer perform this carburetor modification. This engine, when operated at high altitude with the carburetor modifications for high altitude use, will meet each emission standard throughout its useful life. Even with carburetor modification, engine horsepower will decrease by about 3.5% for each 1,000-foot (300-meter) increase in altitude. The effect of altitude on horsepower will be greater than this if no carburetor modification is made.

When the carburetor has been modified for high altitude operation, the air/fuel mixture will be too lean for low altitude use. Operation at altitudes below 3,000 feet (900 meters) with a modified carburetor may cause the engine to overheat and result in serious engine damage.

Note: Jet kits available for purchase upon request, please contact us at 844-DUROMAX to set up your parts order.

Blue DUAL FUEL XPI8SPX fuel engine with attached valve and control panel (no visible text beyond branding)

STARTING THE ENGINE

If this is not your first time using the engine there are still steps you should take to prepare it for operation each time you use it.

IMPORTANT: At this point you should be familiar with the procedures described in the first portion of this section entitled "ENGINE SETUP" If you have not yet read this section, go back and read it now.

Step 1 - Check the Oil

Close-up of a hand holding an orange plastic plug inserted into a car engine compartment (no visible text or symbols)

Close-up of a metallic pipe fitting with a dark liquid inside, no visible text or symbols

Check the oil

The engine is equipped with an automatic shutoff to protect it from damage due to low oil. Nonetheless, you should check the oil level of the engine before each use to ensure that the engine crankcase has a sufficient amount.

To check the oil level:

a. Make sure the engine is on a level surface.
b. Unscrew the oil filler/dipstick cap.
c. With a dry cloth, wipe the oil off of the stick on the inside of the cap.
d. Insert the dipstick as if you were replacing the cap and then remove it again. There should now be oil on the stick. If there is no oil on the stick, or oil only at the very end of the stick, you should add oil until the engine crankcase is filled (see "Adding Oil" portion of the "Maintenance" section).
e. Be sure to replace the cap when finished checking oil.

Model Number XP18	HPX
Engine Oil Capacity 37.2 fl. oz (1.1L)

Step 2 - Check the Gas Level (Optional)

Close-up of a mechanical component with a red internal part and a metallic chain attached to it, set against a blue background (no visible text or symbols)

Check fuel level

If running the engine on gasoline check to see that there is sufficient gasoline in the fuel tank. The gasoline level should always be under the red fuel level indicator located on the bottom of the fuel filter cup.

DANGER DO NOT OVERFILL THE GAS TANK 1.5" OVERFILLING CAN RESULT IN A FIRE, EXPLOSION, OR DEATH.

WARNING: Gasoline and gasoline fumes are highly flammable.

• Do not fill the tank near an open flame.
  • Always allow the engine to cool for several minutes before refueling.
• DO NOT overfill the fuel tank. Fuel expands when shaken or heated. ALWAYS leave 1^1/2 space or more at the top of the tank.
• ALWAYS use fresh fuel or stabilized fuel. Old gasoline (older than 30 days) can cause permanent damage to the fuel system.
  • Always check for fuel spills.

Starting the Engine Using Gasoline

Close-up of a mechanical assembly with visible gears and shafts, no text or symbols present

1. Move gas fuel valve to ON

The gas valve is located above the carburetor bowl. Move the gasoline fuel valve lever all the way to the right-hand position to allow gasoline to flow to the engine carburetor.

Close-up of a mechanical component with an arrow indicating direction, no visible text or symbols

2. Move choke lever ON

The choke lever is located above the gas valve. Move the choke lever to the left-hand side to the ON position to start. Please note that if the engine is hot, turning the choke on is unnecessary.

Close-up of a hand adjusting a mechanical component with a tool (no visible text or symbols)

3. Adjust the throttle lever

The throttle lever is located above and to the right of the choke lever. Adjust the throttle lever to the low speed position.

ENGINE SW. OFF ON START CIRCUIT PROTECTOR

4. Turn key switch to START

Turn the engine key switch to the START position to engage the starter motor and start the engine. After the engine starts release the key to allow it to return to the ON position.

Close-up of a mechanical device interior showing internal components and a white arrow indicating direction (no text or symbols visible)

5. Move the choke lever to RUN

After allowing the engine to preheat, move the choke lever to the right-hand side to the RUN position to steady the idle speed and run the engine.

Close-up of hands adjusting a mechanical component with a blue tool (no visible text or symbols)

6. Adjust the throttle lever

Adjust the throttle lever to the proper position for the desired speed and the engine is ready for use.

CAUTION: LPG must be shut off when using gasoline!

WARNING: Operating the starter motor for more than 5 seconds can damage the motor. If the engine fails to start, release the switch and wait 10 seconds before operating the starter again.

■ STARTING THE ENGINE (CONTINUED)

Starting the Engine Using Propane

Close-up of a mechanical component with a cylindrical shaft and housing, showing internal structure (no visible text or symbols)

1. Move gasoline fuel valve OFF

The gas valve is located above the carburetor bowl. Move the gasoline fuel valve lever all the way to the left-hand position to stop the flow of gasoline to the carburetor.

Close-up of hands installing a wall-mounted electrical component with a green handle (no visible text or symbols)

2. Connect propane hose to tank

Screw the open ACME nut connection on the propane hose to your propane tank and turn the tank on.

Close-up of a mechanical component with a highlighted internal structure and an arrow indicating direction (no text or symbols visible)

3. Move choke lever to ON

The choke lever is located above the gas valve. Move the choke lever to the left-hand side to the ON position to start. Please note that if the engine is hot, turning the choke on is unnecessary.

Close-up of a hand adjusting a mechanical component with a blue background (no visible text or symbols)

4. Adjust the throttle lever

The throttle lever is located above and to the right of the choke lever. Adjust the throttle lever to the high speed position.

Close-up of a hand adjusting a metallic mechanical valve component (no visible text or symbols)

5. Purge the propane regulator

Hold the propane regulator purge button for 3-5 seconds to remove excess air from the propane line.

ENGINE SW. OFF ON START CIRCUIT ROTECTOR

6. Turn key switch to START

Turn the engine key switch to the START position to engage the starter motor and start the engine. After the engine starts release the key to allow it to return to the ON position.

Close-up of a car interior showing engine compartment with a white arrow pointing to a component (no text or symbols visible)

7. Move the choke lever to RUN

After allowing the engine to preheat, move the choke lever to the right-hand side to the RUN position to steady the idle speed and run the engine.

Starting the Engine Using Propane (Continued)

WARNING: WHEN USING THE ENGINE WITH LPG, MAKE SURE THERE IS NO POSSIBLE IGNITION SOURCE CLOSE TO THE ENGINE.

1. Before using, make sure all of the LPG connectors and hoses are well connected and sealed.
2. Start using the engine ONLY after the engine runs smoothly. (There may be remnant gasoline in the carburetor; this can cause unsteady engine performance for several minutes)
3. If the propane gas leaks, shut off the LPG supply immediately.
4. When stopping the engine turn off the LPG Supply. After the engine has stopped turn the key switch to the "OFF" position.

WARNING: Operating the starter motor for more than 5 seconds can damage the motor. If the engine fails to start, wait 10 seconds before operating the starter again.

CAUTION: Gasoline fuel valve must be shut off while running on propane!

Duro

NEXT GENERATION

Max

POWER SYSTEMS

POWERING EVERYONE...

ANYWHERE!

■ STARTING THE ENGINE (CONTINUED)

Starting the Engine Using the Recoil Start

Abstract logo design with blue and green leaf-like shapes and a white lightning bolt (no text or symbols)

1. Select your fuel

If gasoline is preferred: See step 1 on page 24. If propane is preferred: See step 1-5 on page 26.

Close-up of a mechanical component with internal components and an arrow indicating direction (no text or symbols visible)

2. Move choke lever to ON

The choke lever is located above the gas valve. Move the choke lever to the left-hand side to the ON position to start. Please note that if the engine is hot, turning the choke on is unnecessary.

Close-up of a hand adjusting a mechanical component with a tool (no visible text or symbols)

3. Adjust the throttle lever

The throttle lever is located above and to the right of the choke lever. Adjust the throttle lever to the low speed position if using gasoline or the high speed position if using propane.

ENGINE SW. OFF ON START CIRCUIT ESTECTOR

4. Turn key switch to ON

Turn the engine key switch to the ON position to allow the engine to start.

Close-up of a blue industrial machine with a hand adjusting its component (no visible text or symbols)

5. Pull the recoil start handle

Pull the recoil handle slowly until resistance is felt, then quickly pull the recoil handle until fully extended. Continue this step until the engine starts as needed.

CAUTION: Release the recoil handle only after the cord has retracted. Releasing the recoil handle while extended may cause harm to yourself or your equipment.

Close-up of a mechanical component with a white arrow indicating direction, no visible text or symbols

6. Move the choke lever to RUN

After allowing the engine to preheat, move the choke lever to the right-hand side to the RUN position to steady the idle speed and run the engine.

Close-up of a hand adjusting a mechanical component with a tool (no visible text or symbols)

7. Adjust the throttle lever

Adjust the throttle lever to the proper position for the desired speed and the engine is ready for use.

NOTE: If using propane disregard this step; the throttle should always be in the high speed position while using propane.

Duro

NEXT GENERATION

Max

POWER SYSTEMS

POWERING EVERYONE...

ANYWHERE!

Blue DUAL FUEL XPI8SPX fuel engine with attached valve and control panel (no visible text beyond branding)

MAINTENANCE AND CARE

Proper maintenance and storage of your engine is essential to ensure trouble free use of your engine when you need it.

By following the maintenance and care requirements, you can keep your engine running smooth and efficient for years to come.

MAINTENANCE AND CARE

Proper routine maintenance of your engine is essential for safe, economical, and trouble-free operation. It will also help reduce air pollution.

WARNING: Improper maintenance, or failure to correct a problem before operation, can cause a malfunction in which you can be seriously injured or killed. Always follow the inspection, maintenance recommendations, and schedules in this instruction manual.

• Make sure the engine is off before you begin any maintenance or repairs.
- Let the engine and exhaust system cool before touching.
- To reduce the possibility of fire or explosion, be careful when working around gasoline. Use only a nonflammable solvent, not gasoline, to clean parts. Keep cigarettes, sparks, and flames away from all fuel-related parts.

Maintenance Schedule

Remember that this schedule is based on the assumption that your machine will be used for its designed purpose. Sustained high-load, high-temperature operation, or use in unusually wet or dusty conditions, will require more frequent service.

SERVICE	EVERY USE	1ST MO. OR 8 HRS. (BREAK IN)	EVERY 3 MO. OR 50 HRS. OF HEAVY USE	EVERY 6 MO. OR 100 HRS. OF NORMAL USE	EVERY 12 MO. OR 300 HRS.	EVERY 3 YRS. OR 500 HRS.
ENGINE OIL CHECK CHANGE CHANGE
AIR CLEANER CHECK CHECK CHANGE
SPARK PLUG CLEAN /			ADJUST	CLEAN / ADJUST
SPARK ARRESTOR	CHECK CLEAN
IDLE SPEED CHECK /					ADJUST
VALVE CLEARANCE					CHECK / ADJUST
FUEL TUBE CHECK CHECK /					REPLACE
FUEL TANK / FILTER					CLEAN
COMBUSTION CHAMBER						CLEAN

Break-In Period

As the best practice for any new combustion motor it's recommended to perform the break in procedure as follows:

• Run the engine for the first 6-8 hours on conventional oil, then change the oil. After the break-in period synthetic oil may be used.
• During the break in period of the first 6-8 hours keep the engine speed under 50% for optimal results.
• Check and clean the air filter if necessary after the break-in period.

Maintenance Log

As a best practice it's recommended to keep a log of the engine hours and maintenance to ensure your engine is always operating to its full potential.

Date Engine Hours Maintenance	Performed

■ MAINTENANCE AND CARE (CONTINUED)

Checking the Oil

Close-up of a hand holding an orange plastic plug attached to a car engine cylinder (no visible text or symbols)

Close-up of a metallic pipe fitting with a dark liquid inside, no visible text or symbols

Check the oil

The engine is equipped with an automatic shutoff to protect it from damage due to low oil. Nonetheless, you should check the oil level of the engine before each use to ensure that the engine crankcase has a sufficient amount.

To check the oil level:

a. Make sure the engine is on a level surface.
b. Unscrew the oil filler/dipstick cap.
c. With a dry cloth, wipe the oil off of the stick on the inside of the cap.
d. Insert the dipstick as if you were replacing the cap and then remove it again. There should now be oil on the stick. If there is no oil on the stick, or oil only at the very end of the stick, you should add oil until the engine crankcase is filled (see "Adding Oil" portion of the "Maintenance" section).
e. The oil will be visible in the oil fill spout when full.
f. Be sure to replace the cap when finished checking oil.

Model Number XP18	HPX
Engine Oil Capacity 37.2 fl. oz (1.1 L)

Changing the Oil

Gray plastic container with red lid and handle, no visible text or symbols

CAUTION: Worn out or dirty oil does not cool the engine properly and can lead to catastrophic engine damage.

In addition to regular oil changes, it is necessary to drain the oil from the crankcase if it has become contaminated with water or dirt.

Close-up of a hand holding a wrench tool against a metal bracket (no text or symbols visible)

1. Remove drain plug

Using a 12 mm hex wrench, unscrew the oil drain plug, which is located on the crankcase underneath the oil filler/dipstick cap.

Allow all the oil to drain from the engine.

Close-up of a mechanical component with a yellow liquid being poured into a circular opening (no visible text or symbols)

2. Drain oil

Drain oil into an approved oil disposal container. Contact your local auto parts store for information on oil disposal.

Close-up of a metallic mechanical component with a screw and mounting holes (no visible text or symbols)

3. Replace drain plug

Replace the oil drain plug and tighten with a 12 mm hex wrench.

■ MAINTENANCE AND CARE (CONTINUED)

Changing the Air Filter

MAINTAIN AIR FILTER Clean air filter after every 50 hours of use (every 10 hours in unusually dusty conditions) Wash filter element with household detergents. Wipe out dust from air filter housing before replacing filter element. Never clean with a brush

Routine maintenance of the air cleaner helps maintain proper airflow to the carburetor. Check that the air cleaner is free of excessive dirt after every use.

CAUTION: Improper maintenance may cause less air to enter the engine or dirty air to enter the engine causing overheating and engine wear.

Close-up of a metallic switch knob with a central knob and circular dial (no text or symbols visible)

1. Remove filter cover wing nut

Remove the wing nut located on the top of the air filter cover.

Close-up of a mechanical component with a white arrow pointing upward, no visible text or symbols

2. Remove filter cover

Remove the plastic air filter cover by lifting the cover upwards to expose the air filter element.

Top-down view of a CD or DVD disc with a central hole and two side compartments (no visible text or symbols)

3. Remove old filter element

Remove the wing nut on top of the air filter element and slide filter element off center bolt. This filter is paper and is not reusable. Please call 844-DUROMAX to order a replacement filter for your engine.

Stacked cardboard boxes on a metal tray, with a cylindrical container nearby (no visible text or symbols)

4. Replace new filter element

Slide new filter element over center bolt, and replace wing nut. Tighten wing nut hand tight to keep filter in place.

Close-up of a mechanical component with a white arrow pointing downward, no visible text or symbols

5. Replace filter cover

Replace plastic air filter cover over the air filter base.

Close-up of a mechanical switch component with a circular dial and central knob (no text or symbols visible)

6. Secure filter cover

Fasten the air filter cover with the air filter cover wing nut and tighten about hand tight.

■ MAINTENANCE AND CARE (CONTINUED)

Spark Plug Maintenance

SPARK PLUG CONSULT MANUAL BEFORE REMOVING

The spark plug is important for proper engine operation. A good spark plug should be intact, free of deposits, and properly gapped.

CAUTION: Improper maintenance may cause reduced fuel economy, misfires, trouble starting, or damage to the spark plug threads.

Close-up of a hand using a tool to adjust or install a car body panel (no visible text or symbols)

1. Remove spark plug cap

Pull on the spark plug cap to remove it.

Close-up of a metallic automotive component labeled 'OHV' with a metal handle and circular lens (no readable text beyond label)

2. Remove spark plug

Unscrew the spark plug from the engine using the spark plug wrench included with this product.

Close-up of a standard spark plug with metallic threaded body and white plastic cap (no visible text or symbols)

3. Inspect spark plug

Visually inspect the spark plug. If it is cracked or chipped, discard and replace it with a new spark plug. We recommend using an F6RTC spark plug such as NGK BPR6ES.

Close-up of hands holding a metallic analog dial with measurement markings (no readable text or symbols)

4. Measure plug gap

Measure the plug gap with a gauge. The gap should be 0.7-0.8 mm (0.028-0.031 in).

Close-up of a hand using a red tool to connect a coiled metal pipe with visible fibers (no text or symbols)

5. Clean and re-gap

If you are re-using the spark plug, use a wire brush to clean any dirt from around the spark plug base and then re-gap the spark plug.

Close-up of a car engine bay with visible 'OHV' branding and mechanical components (no readable text beyond label)

6. Install spark plug

Screw the spark plug back into its place on the engine using the spark plug wrench.

Close-up of a hand using a tool to adjust or install electronic components (no visible text or symbols)

7. Replace spark plug cap

Replace the spark plug cap.

■ MAINTENANCE AND CARE (CONTINUED)

Removing the Propane Hose (Optional)

The propane hose is removable if needed. If the propane hose is removed please follow the instructions below for the removal.

CAUTION: If propane hose is removed from the carburetor, then the carburetor connection point should be covered with the provided port plug to avoid debris from entering the engine and causing internal damage.

Close-up of mechanical components including a metallic valve and blue housing (no visible text or symbols)

1. Locate carburetor connection

First follow the propane hose until you run into the connection point on the carburetor.

Close-up of a mechanical assembly with metal components and a wrench (no visible text or symbols)

2. Loosen the hose clamp

Locate the hose clamp at the connection point, and loosen the bolt on the clamp.

Close-up of a metallic mechanical component with tubing and mounting brackets (no visible text or symbols)

3. Remove the propane hose

Once the hose clamp is loose you can remove the propane hose from the carburetor.

Close-up of a mechanical assembly with metallic components and a tool, no visible text or symbols

4. Install cap on carburetor

Install the provided propane port cap on the carburetor to ensure no dirt gets inside the carburetor.

■ MAINTENANCE AND CARE (CONTINUED)

Emptying the Gas Tank

Hand pouring a white funnel into a red plastic container (no text or symbols visible)

If you have been using gasoline in your engine, before storing your engine for extended periods of time you should drain your engine fuel tank of gasoline.

CAUTION: Do not store fuel from one season to another. Gasoline sold at the pump today contains additives such as ethanol that even when stored properly may damage the fuel system components.

Close-up of a mechanical device interior with a white arrow pointing to a component (no visible text or symbols)

1. Shut fuel valve OFF

Turn the fuel valve to the "OFF" position.

Close-up of a mechanical component with a white arrow pointing to a small bolt, no visible text or symbols.

2. Remove carburetor drain bolt

Remove the outward angled bolt that is located on the bottom of the carburetor.

Close-up of a hand using a funnel to apply liquid into a container (no visible text or symbols)

3. Place funnel below drain port

Place funnel with container to catch the gasoline under the drain port location.

Close-up of a mechanical assembly with visible gears and shafts, no text or symbols present

4. Turn fuel valve ON and drain

Turn the fuel valve to "ON" and allow gasoline to drain into the container until the gas tank is empty.

Close-up of a mechanical component with internal gears and a white arrow pointing to a feature (no visible text or symbols)

5. Shut fuel valve OFF

Once the gasoline is fully drained, move the fuel valve back to the OFF position.

Close-up of a mechanical component with a white arrow pointing to a bolt, no visible text or symbols.

6. Replace carburetor drain bolt

Reinstall the carburetor drain bolt.

Red industrial fuel can with yellow hose and label (no visible text or symbols on can)

7. Store emptied gasoline

Store the emptied gasoline in a suitable place and add fuel stabilizer to keep fuel fresh and usable.

■ MAINTENANCE AND CARE (CONTINUED)

Storing the Engine for Same Day Use

ENGINE SW. OFF ON START CIRCUIT

1. Run the engine

Allow the engine to run for 3-5 minutes.

ENGINE SW. OFF ON START CIRCUCY

2. Turn key switch to OFF

Move the key switch to the OFF position to shut the engine off.

Blue Duro Max electric vehicle with attached fuel pump and valve (no visible text or symbols)

3. Store engine

After the engine shuts off and cools, then you can store the engine.

CAUTION: Do not obstruct any ventilation openings and keep the engine in a cool dry area.

Storing the Engine for Use Within 30 Days

ENGINE SW. OFF ON START CIRCUIT

1. Run the engine

Allow the engine to run for 3-5 minutes.

Close-up of a mechanical device interior with no visible text or symbols

2. Shut fuel valve OFF and run dry

Shut the fuel valve off and allow engine to run until it stalls out.

ENGINE SW. OFF ON START CIRCUIT

3. Turn the key switch OFF

Move the key switch to the OFF position to shut the engine off.

Fuel Stabilizer

4. Add fuel stabilizer and store

Add fuel stabilizer to gas remaining in tank, and store the engine.

■ MAINTENANCE AND CARE (CONTINUED)

Storing the Engine for Longer Than 30 Days

ENGINE SW. OFF ON START CIRCUIT

1. Run the engine

Allow the engine to run for 3-5 minutes.

Close-up of a mechanical component with internal components and a white arrow pointing to a feature (no visible text or symbols)

2. Shut fuel valve OFF and run dry

Shut the fuel valve off and allow engine to run until it stalls out.

ENGINE SW. OFF ON START CIRCUIT

3. Turn the key switch OFF

Move the key switch to the OFF position to shut the engine off.

Close-up of a hand using a funnel to press or<|rotate_right|> a white object, with mechanical components visible in the background (no text or symbols)

4. Empty the gas tank

Fully drain your gas tank as shown in "Emptying the Gas Tank" on page 44-45.

Close-up of a hand holding a metallic tool interacting with a mechanical component (no visible text or symbols)

5. Remove spark plug

Remove spark plug as shown in "Spark Plug Maintenance" on page 40.

Close-up of a hand pouring liquid into an orange funnel-shaped container labeled 'OHV' (no other text or symbols visible)

6. Add oil to cylinder

Add 2 tablespoons of 10W-30 motor oil directly into the spark plug hole, and pull the recoil to lubricate cylinder. After lubricating cylinder reinstall the spark plug as shown in "Spark Plug Maintenance" on page 41.

Blue Duro Max engine with black and white components, no visible text or symbols on the body

7. Store engine

The engine is ready to be stored in a cool dry area.

CAUTION: Do not obstruct any ventilation openings and keep the engine in a cool dry area.

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Blue DUAL FUEL XPI890PX hydraulic pump with attached valve and control panel (no visible text beyond branding)

SPECIFICATIONS

A quick reference to useful information on your new DuroMax engine, please see this section for more details on this engine's specifications.

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SPECIFICATIONS

Displacement 439cc
Fuel Type ≥87 octane, ≤10% ethanol, unleaded gasoline, propane
Dry Weight 77 lbs
Maximum Torque 27 ft. lb @ 2500 rpm
Compression Ratio 8.4:1
Bore X Stroke 92 mm x 66 mm
Engine Oil Capacity 37.2 oz. (1.1 L)
Fuel Tank Capacity 1.4 gal. (5.325 L)
Lowest Idling Speed 1800 rpm ± 300 rpm
Dimensions LENGTH 20 in.
	WIDTH 18 in.
	HEIGHT 19 in.
Engine Type 4-Stroke OHV Forced-Air
Ignition System Non-contact transistor
Lubrication Mode Splash
Starting Type Electric / Recoil
Shaft Rotation Counter-clockwise
Shaft Size	1" diameter, 2-3/4" long, 1/4" key-way
Shaft End	3/8" size 24 UNF - drilled and tapped
Center of Shaft to Base	5"
Gasoline Consumption	≤370 g/kWh
Bearing Type	Stainless steel ball bearing
Cylinder Sleeve Type	Cast iron sleeve
Fuel Delivery System	Carburetor

Adjustment, Torque, and Timing Specifications

Adjustment Specification

Spark Plug Clearance .027-.031 in. (0.7-0.8 mm)

Spark Plug Type F6RTC (Torch) F6TC (Torch) BPR6ES (NGK) RN9YC

(Champion) WR7DC (Bosch) W20EPR-U (Denso)

Valve Clearance (Cold) Intake: .006 in ± .001 in. (0.15 mm ± 0.02 mm)

Exhaust: .008 in ± .001 in. (0.20 mm ± 0.02 mm)

Carburetor Idling 1800 ± 300 rpm

Torque Value

Cylinder head bolt 29.50 ± 2.21 ft. lb (40 ± 3 N·m)

Flywheel bolt 70 ± 5.9 ft. lb (95 ± 8 N.m)

Crankcase bolt 18 ft. lb. (24 N·m)

Tie-rod bolt 9 ft. lb. (12 N·m)

Timing Distribution

Intake Open (Timing) BTDC 10°

Intake Closed (Timing) ABCD 20°

Exhaust Open (Timing) BBDC 30°

Exhaust Closed (Timing) ATDC 10°

Engine Diagrams

4x3/8-16 UNC-2B 4x5/16-24 UNF-2B (φ165.1) (φ176.5) (φ146.0,0.063) 3.2 (30°) (30°) (45°) (45°) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (44.7) (43.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) (32.0) 19MØ15-50 20 24 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58.4 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58. 58.

SPECIFICATIONS (CONTINUED)

3/8-72 14 28 56 72.2 88.5

2-Ø12 Ø3 25.5 95 20 2-Ø8 85 Ø3 Ø2 10

Wiring Diagram

graph TD
    A["Power Source"] --> B["Switch 1"]
    B --> C["Resistor M"]
    C --> D["Motor M"]
    D --> E["Ground"]
    F["Switch 2"] --> G["Resistor 3"]
    G --> H["Motor 10"]
    I["Switch 3"] --> J["Resistor 6"]
    J --> K["Motor 10"]
    L["Switch 4"] --> M["Resistor 5"]
    M --> N["Motor 10"]
    O["Switch 5"] --> P["Resistor 7"]
    P --> Q["Motor 10"]
    R["Switch 6"] --> S["Resistor 8"]
    S --> T["Motor 10"]
    U["Switch 7"] --> V["Resistor 9"]
    V --> W["Motor 10"]
    X["Switch 8"] --> Y["Resistor 10"]
    Y --> Z["Motor 10"]
    AA["Switch 9"] --> AB["Resistor 10"]
    AB --> AC["Motor 10"]
    AD["Switch 10"] --> AE["Ground"]
    AF["Switch 11"] --> AG["Resistor 11"]
    AH["Switch 12"] --> AI["Resistor 12"]
    AJ["Switch 13"] --> AK["Resistor 13"]
    AL["Switch 14"] --> AM["Ground"]

1. Control Box
2. Rectifier
3. Fuse
4. Circuit Breaker
5. Engine Switch
6. Oil Alert Unit

7. Type With Oil Alert Unit

8. Oil Level Switch

9. Charging Coil
10. Ignition Coil
11. Spark Plug
12. Starter Motor
13. Starter Solenoid
14. Battery (12V)

BI Black

Y Yellow

Gr Gray

R Red

W White

BI/W Black/White

BI/R Black/Red

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Blue DUAL FUEL XPT80PX fuel engine with attached valve and control panel (no visible text beyond branding)

TROUBLESHOOTING

This section of the manual is to help you troubleshoot problems with your engine.

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TROUBLESHOOTING

Mode Description	Solution
Engine will not start	Engine switch is “OFF” Set engine	switch to “ON”
	Fuel valve is “OFF” Turn fuel valve	to “ON”
	Choke is open Close the choke
	Engine is out of fuel Add fuel
	Fuel is old or contaminated Change fuel
	Spark plug is dirty Clean spark plug
	Spark plug is broken Replace spark plug
	Engine is not level	Move engine to a level surface
	Oil is low Add / change oil
Engine starts, but shuts off after running for short time.	Oil level is low Add change oil
	Fuel is old or contaminated Change fuel
	Engine is on incline exceeding 15°	Disconnect low oil sensor
Electric key switch doesn’t start or shut off engine.	Key switch separated from frame of engine	Run ground wire from engine block to key switch
	Negative battery or positive battery cable aren’t connected properly	See page 18 for proper installation of battery cables.
	Battery is dead or defective Charge or replace battery

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Blue DUAL FUEL XPT80PX fuel engine with attached valve and control panel (no visible text or symbols on the device itself)

WARRANTY

This section of the manual is to help you understand your warranty.

3-year Warranty

All DuroMax Power Equipment warrant the original purchasers to a 3-year Parts Warranty (Residential

Use ONLY: Unusually heavy or commercial use is covered for a period of 1-year) in the event of failure due to defects in electrical or mechanical components. Freight on any items submitted for replacement or repair under the Warranty are the responsibility of the equipment owner. This warranty is non-transferable and only valid to the original purchaser.

Warranty Exclusions

The DuroMax Power Equipment warranty does not cover repairs or returns when the fault is: Normal Wear and Tear, Installation Use or Maintenance Services, Cosmetic defects, Accessories, Failures due to acts of God or Natural Disasters, or problems related to/from aftermarket or non-OEM parts.

Warranty Limitations

DuroMax Power Equipment does not claim or hold any obligation to loss of time, freight charges, use of product, or any incidental damages from the use of this product. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED.

U.S. FEDERAL AND CALIFORNIA EMISSIONS CONTROL WARRANTY STATEMENT

YOUR WARRANTY RIGHTS AND OBLIGATIONS

The U.S. Environmental Protection Agency (EPA), California Air Resources Board, and DuroMax Power Equipment are pleased to explain the emissions control system's warranty on your 2022/2023 small off-road engine.

In California, new small off-road engines must be designed, built, and equipped to meet the State's stringent anti-smog standards. DuroMax Power Equipment must warrant the emissions control system on your small off-road engine for the period listed below provided there has been no abuse, neglect, or improper maintenance of your small off-road engine leading to the failure of the emission control system.

Your emissions control system may include parts such as: carburetors or the fuel injection system, ignition system, catalytic converters, fuel tanks, fuel lines (for liquid fuel and fuel vapors), fuel caps, valves, filters, clamps, connectors, and other associated components. Also, included may be hoses, belts, sensors, and other emission-related assemblies.

Where a warrantable condition exists, DuroMax Power Equipment will repair your small off-road engine at no cost to you including diagnosis, parts, and labor.

MANUFACTURER'S WARRANTY COVERAGE:

This emissions control system is warranted for two years. If any emissions-related part on your small off-road engine is defective, the part will be repaired or replaced by DuroMax Power Equipment.

OWNER'S WARRANTY RESPONSIBILITIES:

As the small off-road engine owner, you are responsible for performance of the required maintenance listed in your owner's manual. DuroMax Power Equipment recommends that you retain all receipts covering maintenance on your small off-road engine, but DuroMax Power Equipment cannot deny warranty coverage solely for the lack of receipts or your failure to ensure the performance of all scheduled maintenance.

As the small off-road engine owner, you should be aware that the DuroMax Power Equipment may deny you warranty coverage if your small off-road engine or a part has failed due to abuse, neglect, or improper maintenance or unapproved modifications.

You are responsible for presenting your small off-road engine to a DuroMax Power Equipment distribution center or service center as soon as the problem exists. The warranty repairs shall be completed in a reasonable amount of time, not to exceed 30 days.

If you have any questions regarding your warranty coverage, contact us at 844-387-6629 or email [e-mail].

DEFECTS WARRANTY REQUIREMENTS:

The warranty period begins on the date the engine or equipment is delivered to an ultimate purchaser and extends for a period of Two Years.

GENERAL EMISSIONS WARRANTY COVERAGE:

DuroMax Power Equipment warrants to the ultimate purchaser and each subsequent owner that the engine or equipment is:

1. Designed, built, and equipped to conform with all applicable regulations adopted by the Air Resources Board; and
2. Free from defects in materials and workmanship that causes the failure of a warranted part for a period of two years.

The warranty on emissions-related parts will be interpreted as follows:

1. Any warranted part that is not scheduled for replacement as required maintenance in the Owner's Manual must be warranted for the warranty period stated above. If any such part fails during the period of warranty coverage, it must be repaired or replaced by DuroMax Power Equipment according to Subsection (4) below. Any such part repaired or replaced under the warranty must be warranted for a time not less than the remaining warranty period.

2. Any warranted part that is scheduled only for regular inspection in the Owner's Manual must be warranted for the warranty period stated above. A statement in such written instructions to the effect of "repair or replace as necessary" shall advise owners of the warranty coverage for emission related parts. Replacement within the warranty period is covered by the warranty and will not reduce the period of warranty coverage. Any such part repaired or replaced under warranty must be warranted for a time not less than the remaining warranty period.

3. Any warranted part that is scheduled for replacement as required maintenance in the Owner's Manual must be warranted for the period prior to the first scheduled replacement point for that part. If the part fails prior to the first scheduled replacement, the part must be repaired or replaced by the engine manufacturer according to Subsection (4) below. Any such part repaired or replaced

WARRANTY (CONTINUED)

under warranty must be warranted for a time not less than the remainder of the period prior to the first scheduled replacement point for the part.

1. Repair or replacement of any warranted part under the warranty must be performed at no charge to the owner at a warranty station.
2. Notwithstanding the provisions of Subsection (4) above, warranty services or repairs must be provided at all manufacturer distribution centers that are franchised to service the subject engines.
3. The owner must not be charged for diagnostic labor that leads to the determination that a warranted part is in fact defective, provided that such diagnostic work is performed at a warranty station.
4. The manufacturer is liable for damages to other engine components proximately caused by a failure under warranty of any warranted part.
5. Throughout the emission control system's warranty period stated above, the manufacturer must maintain a supply of warranted parts sufficient to meet the expected demand for such parts and must obtain additional parts if that supply is exhausted.
6. Manufacturer-approved replacement parts that do not increase the exhaust or evaporative emissions of the engine or emissions control system must be used in the performance of any warranty maintenance or repairs and must be provided without charge to the owner. Such use will not reduce the warranty obligations of DuroMax Power Equipment.
7. Add-on or modified parts that are not exempted by the Air Resources Board may not be used. The use of any non-exempted add-on or modified parts will be grounds for disallowing a warranty claim made in accordance with this Article. DuroMax Power Equipment will not be liable under this Article to warrant failures of warranted parts caused by the use of an add-on or modified part.
8. DuroMax Power Equipment shall provide any documents that describe warranty procedures or policies within five working days of request by the Executive Officer.

Exhaust Emission Warranty Parts List.

1. Fuel Metering System
   i. Carburetor and internal parts (and/or pressure regulator or fuel injection system).
   ii. Air/fuel ratio feedback and control system.
   iii. Cold start enrichment system.
2. Air Induction System
   i. Controlled hot air intake system.
   ii. Intake manifold.
3. Ignition System
   i. Spark Plugs.
   ii. Magneto or electronic ignition system. iii. Spark advance/retard system.

4. Air Injection System
   i. Air pump or pulse valve.
   ii. Valves affecting distribution of flow.
   iii. Distribution manifold.

5. Catalyst or Thermal Reactor System

i. Catalytic converter.
ii. Thermal reactor.
iii. Exhaust manifold.
6. Particulate Controls
7. Traps, filters, precipitators, and any other device used to capture particulate emissions.
8. Electronic controls.
9. Vacuum, temperature, and time sensitive valves and switches.
10. Hoses, belts, connectors, and assemblies.

Evaporative Emission Warranty Part List

1. Fuel Tank
   2.Fuel Cap
2. Fuel Line (for liquid fuel and fuel vapors)
   4.Fuel Line Fittings
   5.Clamps*
3. Pressure Relief Valves*
4. Control Valves*
5. Control Solenoids*
   9.Electronic Controls*
6. Vacuum Control Diaphragms*
7. Control Cables*
8. Control Linkages*
9. Purge Valves*
10. Gaskets*
11. Liquid/Vapor Separator
12. Carbon Canister
13. Canister Mounting Brackets
14. Carburetor Purge Port Connector

* Note: As they relate to the evaporative emission control system.

DuroMax Power Equipment will furnish with each new engine written instructions for the maintenance and use of the engine by the owner

CUSTOMER SERVICE

DuroMax Power Equipment is committed to ensuring that our products perform when they need to. Should you have any problems, please contact our customer service department:

DUROMAX POWER EQUIPMENT 5800 Ontario Mills Parkway Ontario, CA 91764

Customer Service: 844-DUROMAX Customer Service Hours: 8-5 p.m. PST Mon-Fri

Website: www.duromaxpower.com Email: [e-mail]

Woman wearing a headset and white shirt, smiling while holding a microphone, with a computer monitor in the background (no visible text or symbols)

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5800 Ontario Mills Parkway

Ontario, CA 91764

United States

844-DUROMAX