BCF500H - Lawn mower Maruyama - Free user manual and instructions

Product Type	String Trimmer / Brushcutter
Brand	Maruyama
Model	BCF500H
Dry Weight (without blade and harness)	18.5 lbs (8.4 kg)
Engine Displacement	49.9 cm³
Fuel Tank Capacity	1.06 quarts (1.0 L)
Gas to Oil Ratio	50:1
Fuel Type	Unleaded gasoline (87 octane or higher, up to 10% ethanol)
Oil Type	ISO-L-EGD & JASO FC grade 2-cycle oil (e.g., Maruyama Premium)
Spark Plug	NGK BPM6Y, gap 0.024-0.028 in (0.6-0.7 mm)
Idle Speed	2400-2800 RPM (cutting head must not rotate)
Cutting Attachments	Nylon trimmer head (left-hand rotation) or brushcutter blade
Anti-Vibration System	Dual isolation (grip and engine mount)
Ignition System	Solid state (electronic)
Carburetor	Walbro diaphragm type (non-adjustable fuel mixture)
Warranty (Residential)	3 years for product; lifetime for inner drive shafts and ignition modules
Emission Warranty	2 years (EPA compliant)
Safety Features	Blade shield, string cutoff blade, shoulder harness with quick-release red button, stop switch
Maintenance Interval (Air Filter)	Clean daily; replace every 100 hours
Maintenance Interval (Spark Plug)	Check every 25 hours; replace every 100 hours
Maintenance Interval (Gearcase Lubrication)	Every 30 hours
Storage	Drain fuel, run engine dry, store in dry place away from heat/open flame

Frequently Asked Questions - BCF500H Maruyama

What is the correct fuel mixture for the Maruyama BCF500H?

Use a 50:1 ratio of unleaded gasoline (87 octane or higher) to ISO-L-EGD & JASO FC grade 2-cycle oil. For example, mix 2.6 oz of oil per gallon of gasoline. Never use a ratio leaner than 50:1.

How do I start a cold engine on the BCF500H?

1. Pump the primer bulb until fuel flows clearly through the return line. 2. Set choke to Close. 3. Ensure stop switch is ON and throttle trigger is at fast-idle. 4. Pull starter grip. 5. After start, open choke and squeeze/release throttle to idle.

How do I stop the engine?

Release the throttle trigger, then slide the stop switch to the STOP position.

How do I adjust the idle speed?

Turn the idle speed screw on the carburetor: clockwise to increase idle speed (2400-2800 RPM), counterclockwise to decrease. The cutting head must not rotate at idle.

What cutting attachments can I use?

You can use a nylon trimmer head (left-hand rotation, M8 thread) or a Maruyama-approved brushcutter blade. Always use the appropriate guard and shield.

How do I install the brushcutter blade?

1. Remove the blade bolt, stabilizer, and clamping washer. 2. Install blade onto boss adapter. 3. Reinstall clamping washer, stabilizer, and blade bolt (left-hand thread). 4. Lock shaft with 3.5 mm pin through hole in adapter and gearcase. 5. Tighten bolt. 6. Remove pin.

What safety equipment should I wear?

Always wear ANSI Z87.1 eye protection, hearing protection, heavy long pants, long-sleeved shirt, boots, and gloves. Secure hair above shoulders. Do not wear loose clothing or jewelry.

How often should I clean the air filter?

Clean the foam element daily with warm soapy water. Dry completely, then apply a light coat of SAE 30 oil and squeeze out excess. Replace every 100 hours.

How do I replace the fuel filter?

Ensure the fuel tank is empty. Remove fuel cap, gently pull out old filter with a wire hook. Detach from hose, attach new filter, drop back into tank, and ensure hose is not kinked.

What should I do for long-term storage?

Empty the fuel tank, pump primer to remove residual fuel, run engine dry. Perform all maintenance. Remove spark plug, squirt oil into cylinder, pull starter once, then bring piston to TDC. Reinstall plug. Store in a dry place away from heat or flame.

USER MANUAL BCF500H Maruyama

String Trimmer / Brushcutter

Technical line drawing of a mechanical assembly with no visible text or symbols

maruyama.

Limited Warranty Statement

All Maruyama products are warranted to the original purchaser to be free from defects in material and workmanship from the date of purchase for the time periods listed as follows:

Lifetime for inner drive shafts on trimmers and brushcutters and all ignition modules. 3 years for residential, non-institutional, non-income producing use. 1 year for industrial, commercial, institutional, rental and income producing use. Maruyama AE series engines and Kawasaki TEX45/TEX54 are covered exclusively for one additional year of industrial, commercial, institutional, rental and income producing use (total of 2 years). All other engines refer to engine manufacture's warranty statement.

Any part of a Maruyama product found to be defective within the applicable warranty period shall, at Maruyama's option, be repaired or replaced without charge. Warranty consideration is obtained by delivering any Maruyama product believed to be defective to an Authorized Maruyama Servicing Dealer within the applicable warranty period.

The purchaser shall not be charged for diagnostic labor that leads to the determination that a warranted part is defective, if the diagnostic work is performed at a Maruyama Dealer.

Any warranted part which is not scheduled for replacement as required maintenance, or which is scheduled only for regular inspection to the effect of "repair or replace as necessary" shall be warranted for the warranty period. Any warranted part which is scheduled for replacement as required maintenance shall be warranted for the period of time up to the first scheduled replacement point for that part. Maruyama Mfg. Co., Inc. is liable for damages to other engine components caused by the failure of warranted part still under warranty.

The purchaser is responsible for the performance of the required maintenance, as defined by Maruyama Mfg. Co., Inc. in the Owner's/Operator's Manual.

EMISSION-RELATED PARTS WARRANTY: In addition to the above warranty coverage, Maruyama Mfg. Co., Inc. will repair or replace, free of charge, for the original purchaser and each subsequent purchaser any emission-related part or parts found to be defective in material and workmanship for two (2) years from original retail delivery date. Emission-related parts are the carburetor assembly, the ignition coil assembly, the ignition rotor and the spark plug and the fuel tank. Any replacement part that is equivalent in performance and durability may be used in non-warranty maintenance or repairs, and shall not reduce the warranty obligations of Maruyama Mfg. Co., Inc.

This warranty does not cover the following:

1. Maintenance items (excluding defects in materials and workmanship) including hoses, spark plugs, starter rope, air and fuel filters, clutch shoes, vibration isolators, throttle cables and all cutting attachments, etc.
2. Extra expenses including shipping and handling, travel, payment for lost time or pay and for any inconvenience and storage.
3. Alterations or modifications including aftermarket parts not authorized by Maruyama U.S., Inc.
4. Wear, accident, abuse, neglect, misuse, negligence, improper fuels, lubricants, fuel mixtures (when applicable), or failure to operate or maintain the product in accordance with instructions approved by Maruyama.

Repair or replacement as provided under this warranty is the exclusive remedy of the consumer. Maruyama shall not be liable for any incidental or consequential damages for breach of any express or implied warranty on these products except to the extent prohibited by applicable law. Any implied warranty of merchantability or fitness for a particular purpose on these products is limited in duration to the warranty period as defined in the limited warranty statement. Maruyama reserves the right to change or improve the design of the product without notice and does not assume obligation to update previously manufactured products.

This warranty provides you with specific legal rights which may vary from state to state.

It is the Owner's and Dealer's responsibility to make sure the Warranty Registration Card is properly filled out and mailed to Maruyama U.S., Inc. Proof of purchase and registration will be required in order to obtain warranty service.

To locate an Authorized Maruyama Servicing Dealer nearest you, contact Maruyama U.S., Inc. at 1-940-383-7400.

Maruyama U.S., Inc.

P.O. Box 2107

Denton, TX76202

FEDERAL EMISSION CONTROL WARRANTY STATEMENT YOUR WARRANTY RIGHTS AND OBLIGATIONS

The U.S. Environmental Protection Agency (EPA) and Maruyama Manufacturing Company, Inc. are pleased to explain the emission control system warranty on your small nonroad engine. New 1997 and later model year small nonroad engines must be designed, built and equipped, at the time of sale, to meet the U.S. EPA regulations for small nonroad engines. The equipment engine must be free from defects in materials and workmanship which cause it to fail to conform with U.S. EPA standards for the first two years of engine use from the date of sale to the ultimate purchaser. Maruyama Manufacturing Company, Inc. must warrant the emission control system on your small nonroad engine for the period of time listed above provided there has been no abuse, neglect or improper maintenance of your small nonroad engine.

Your emission control system may include parts such as the carburetor or fuel injection system, the ignition system, and catalytic converter. Also included may be hoses, belts, and connectors and other emission related assemblies.

Where a warrantable condition exists, Maruyama Manufacturing Company, Inc. will repair your small nonroad engine at no cost to you, including diagnosis (if the diagnostic work is performed at an authorized dealer), parts, and labor.

MANUFACTURER'S WARRANTY COVERAGE:

1997 and later model year small nonroad engines are warranted for two years. If any emission-related part on your engine is defective, the part will be repaired or replaced by Maruyama Manufacturing Company, Inc. free of charge.

OWNER'S WARRANTY RESPONSIBILITIES:

(a) As the small nonroad engine owner, you are responsible for the performance of the required maintenance listed in your owner's manual.

Maruyama Manufacturing Company, Inc. recommends that you retain all receipts covering maintenance on your small nonroad engine, but Maruyama Manufacturing Company, Inc. cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance. Any replacement part or service that is equivalent in performance and durability may be used in non-warranty maintenance or repairs, and shall not reduce the warranty obligations of the engine manufacturer.

(b) As the small nonroad engine owner, you should be aware, however, that Maruyama Manufacturing Company may deny you warranty coverage if your small nonroad engine or a part has failed due to abuse, neglect, improper maintenance or unapproved modifications.

(c) You are responsible for presenting your small nonroad engine to a Maruyama Manufacturing Company, Inc. service center as soon as a problem exists. The warranty repairs should be completed in a reasonable amount of time, not to exceed 30 days.

If you have any questions regarding your warranty rights and responsibilities, you should contact Maruyama U.S., Inc. at 1-940-383-7400.

COVERAGE

Maruyama Manufacturing Company, Inc. warrants to the ultimate purchaser and each subsequent purchaser that your small nonroad engine will be designed, built and equipped, at the time of sale, to meet all applicable regulations. Maruyama Manufacturing Company, Inc. also warrants to the initial purchaser and each subsequent purchaser that your small nonroad engine is free from defects in materials and workmanship which cause the engine to fail to conform with applicable regulations for a period of two years.

1997 and later model years, EPA requires manufacturers to small nonroad engines for two years. These warranty periods will begin on the date the small nonroad engine is purchased by the initial purchaser. If any emission-related part on your engine is defective, the part will be replaced by Maruyama Manufacturing Company, Inc. at no cost to the owner.

Maruyama Manufacturing Company, Inc. shall remedy warranty defects at any authorized Maruyama Manufacturing Company, Inc. engine dealer or warranty station. Any authorized work done at an authorized dealer or warranty station shall be free of charge to the owner if such work determines that a warranted part is defective. Any manufacturer-approved or equivalent replacement part may be used for any warranty maintenance or repairs on emission-related parts, and must be provided free of charge to the owner if the part is still under warranty, Maruyama Manufacturing Company, Inc. is liable for damages to other engine components caused by the failure of a warranted part still under warranty.

EPA's regulations do not include a parts list, but EPA considers emission-related warranted parts to include all the parts listed below. These warranted parts are: the carburetor assembly, the ignition coil assembly, the ignition rotor, the spark plug and the fuel tank.

MAINTENANCE REQUIREMENTS

The owner is responsible for the performance of the required maintenance as defined by the Maruyama Manufacturing Company, Inc. in the owner's manual.

LIMITATIONS

This Emission Control System Warranty shall not cover any of the following:

(a) repair or replacement required because of misuse or neglect, lack of required maintenance, repairs improperly performed or replacements not conforming to Maruyama Manufacturing Company, Inc. specifications that adversely affect performance and/or durability, and alterations or modifications not recommended or approved in writing by Maruyama Manufacturing Company, Inc., and

(b) replacement of parts and other services and adjustments necessary for required maintenance at and after the first scheduled replacement point.

Contents

Page

Limited Warranty Statement.... 1

California Emission Control 2

Introduction 5

Safety....6

Operator Safety 6

Trimmer/Brushcutter Safety 6

Fuel Safety 7

Trimmer/Brushcutter Operating Safety 7

Safety and Instruction Decals 9

Product Description....9

Assembly....10

Horn Handle Installation....10

Installing Guard 11

Installing Cutting Attachment.... 12

Brushcutter Blade 12

Attaching Shoulder Harness 13

Before Operation.... 13

Oil and Fuel 13

Mixing Gasoline and Oil.... 15

Starting and Stopping.... 16

Idle Speed Adjustment.... 17

Trimmer / Brushcutter Operation.... 18

Trimmer / Brushcutter Operating Position..... 18

Cutting with Nylon Trimmer Line.... 19

Cutting Direction 20

Cutting Blades.... 21

Maintenance 21

Maintenance Interval 21

Air Filter Cleaning 21

Fuel Filter 22

Spark Plug.... 22

Cylinder Cooling Fins.... 23

Spark Arrester 23

Exhaust Muffler 24

Gearcase 25

General Cleaning and Tightening 25

Blade Sharpening.... 25

Storage.... 26

Troubleshooting 28

Specifications 28

Introduction

Thank you for purchasing a Maruyama product.

Maruyama, it's distributors, and dealers want you to be completely satisfied with your new product. Please feel free to contact your local Authorized Service Dealer for help with service, genuine Maruyama parts, or other information you may require.

Whenever you contact your Authorized Service Dealer or the factory, always know the serial number of your product. This number will help the Service Dealer or Service Representative provide exact information about your specific product. You will find the model and serial number located in a unique place on the product (Product Description on page 9).

For your convenience, write the product model name and serial number in the space below.

Model Name ____

Serial No.

Read this manual carefully to learn how to operate and maintain your product correctly. Reading this manual will help you and others avoid personal injury and damage to the product.

Although Maruyama designs, produces and markets safe, state-of-the-art products, you are responsible for using the product properly and safely. (You are also responsible for training persons who you allow to use the product for safe operation.)

The Maruyama warning system in this manual identifies potential hazards and has special safety messages that help you and others avoid personal injury, even death. DANGER, WARNING and CAUTION are signal words used to identify the level of hazard. However, regardless of the hazard, be extremely careful.

DANGER signals an extreme hazard that will cause serious injury or death if the recommended precautions are not followed.

WARNING signals a hazard that may cause serious injury or death if the recommended precautions are not followed.

CAUTION signals a hazard that may cause minor or moderate injury if the recommended precautions are not followed. Two other words are also used to highlight information. "Important" calls attention to special mechanical information and "Note" emphasizes general information worthy of special attention.

Safety

Operator Safety

I. Read and understand this Operator's Manual before using this product. Be thoroughly familiar with the proper use of this product.

1. Never allow children to operate the Trimmer/Brushcutter. It is not a toy. Never allow adults to operate the unit without first reading the Operator's Manual.

2. Always wear eye protection that complies with ANSI (American National Standards Institute) Z87-1.

1. Always wear hearing protection.

1. Always wear heavy, long pants, a long sleeved shirt, boots and gloves. Do not wear loose clothing, jewelry, short pants, sandals, or go barefoot. Secure hair so it is above shoulder length.

2. Never operate this Trimmer/Brushcutter when you are tired, ill, or under the influence of alcohol, drugs or medication.

3. Never start or run the engine inside a closed room or building. Breathing exhaust fumes can cause death.

1. Keep handles clean of oil, fuel and dirt.

Trimmer/Brushcutter Safety

1. Make sure the Trimmer/Brushcutter is assembled correctly and that the Cutting Attachment is correctly installed and securely fastened as instructed in the Assembly section.

2. Inspect the Trimmer/Brushcutter before each use. Replace damaged parts. Check for fuel leaks. Make sure all fasteners are in place and tightened securely. Follow the maintenance instructions beginning on page 23.

3. Make sure the cutting head does not rotate at engine idle speed. Refer to Idle Speed Adjustment, page 18.

4. Inspect the cutting head and replace any parts that are cracked, chipped or damaged before using the Trimmer/Brushcutter.

5. Make sure the cutting head shield is installed and positioned correctly before using the Trimmer/Brushcutter.

6. Never use a cutting head or replacement parts that are not approved by Maruyama.
7. Maintain the Trimmer/Brushcutter according to the recommended maintenance intervals and procedures in the Maintenance section on page 23.
8. Shut off the engine and be certain the cutting head has completely stopped rotating before inverting the Trimmer/Brushcutter, performing maintenance on or working on the machine.
9. If running problems or excessive vibration occur, stop immediately and inspect the unit for the cause. If the cause cannot be determined or is beyond your ability to correct, return the Trimmer/Brushcutter to your servicing dealer for repair.

Fuel Safety

1. Gasoline is highly flammable and must be handled and stored carefully. Use a container approved for fuel to store gasoline and/or fuel/oil mixture.
2. Mix and pour fuel outdoors, where there are no sparks or flames.
3. Do not smoke near fuel or Trimmer/Brushcutter, or while using the Trimmer/Brushcutter.
4. Do not overfill the fuel tank. Stop filling 1/4-1/2 inch (6 mm-13 mm) from the top of the tank.

5. Wipe up any spilled fuel before starting the engine.

6. Move the Trimmer/Brushcutter at least 10 feet (3 m) away from the fueling location before starting the engine.

1. Do not remove the fuel tank cap while the engine is running, or right after stopping the engine.
2. Allow the engine to cool before refueling.
3. Drain the tank and run the engine dry before storing the unit.
4. Store fuel and Trimmer/Brushcutter away from open flame, sparks and excessive heat. Make sure fuel vapors cannot reach sparks or open flames from water heaters, furnaces, electric motors, etc.

Trimmer/Brushcutter Operating Safety

1. THIS TRIMMER BRUSHCUTTER CAN CAUSE SERIOUS INJURIES. Read the instructions carefully. Be familiar with all controls and the proper use of the Trimmer/Brushcutter.

2. Make sure the 3 mm hex wrench has been removed from the gearcase and boss adapter before you start the engine.

3. Avoid using the Brushcutter near rocks, gravel, stones and similar material which can become dangerous projectiles.

4. Inspect your work area before you begin. Remove objects such as broken glass, nails, wire and rocks which can become dangerous projectiles if thrown by the Trimmer/Brushcutter. Remove string, rope or similar materials which can become entangled in the cutting head.

5. Keep children, bystanders and animals outside a 50 ft. (15 m) radius from the operator and Trimmer/Brushcutter.

1. If you are approached while operating the Trimmer/Brushcutter, stop the engine and cutting head rotation.

2. Never allow children to operate the Trimmer/Brushcutter.

3. Use the Trimmer/Brushcutter only in daylight or good artificial light.

4. Never operate the Trimmer/Brushcutter without proper guards or other protective safety devices in place.

5. Always keep the Trimmer/Brushcutter on the right side of your body.

6. Do not raise the cutting head above waist level.

7. Do not put hands or feet near or under any rotating parts. Keep clear at all times. Keep all parts of your body away from the rotating cutting attachment and hot surfaces such as the muffler.

8. When cutting heavy brush or small trees, always move the Brushcutter from right to left to prevent kick-back.

1. Keep firm footing and balance. Do not overreach.

2. Use the right tool for the job. Do not use the Trimmer/Brushcutter for any job that is not recommended by Maruyama.

Safety and Instruction Decals

Safety decals and instructions are easily visible to the operator and are located near any area of potential danger. Replace any decal that is damaged or lost.

ON SHAFT

(Part No.221501)

ON SHAFT
(Part No.221502)

Product Description

1. Gearcase 11. Fuel Tank
2. Shaft Assembly 12. Throttle Cable and Stop Switch Wires
3. Model Name
4. Safety Decal
5. Attachment Ring for Shoulder Harness
6. Throttle Trigger and Stop Switch
7. Clutch Drum Housing
8. Engine
9. Serial Number (on rear of engine)
10. Air Filter

Assembly

Horn Handle Installation

IMPORTANT: Be careful not to damage the throttle cable and stop switch wires when you remove the horn handles from the carton.

1. Loosen the four screws on the top of the clamp bracket.
2. Insert the left and right horn handles into the clamp bracket. Note that the horn handle with the throttle trigger and stop switch goes on the right-hand side of the Trimmer/brushcutter.
3. Adjust the horn handles to the desired position, then tighten the four screws.
4. Clamp the throttle cable assembly as shown.

[BCF5050H]

Caution! : This swivel stopper is exclusively for fixing the handle in transport. Do not engage the swivel stopper while operating the brushcutter.

Loosen the wing nut, place the stopper on A position of the bracket. Tighten the wing nut, confirm the handle is fixed by the swivel stopper.

In operation: Before start operation of the brushcutter, disengage the swivel stopper. Loosen the wing nut, place the swivel stopper at B position. Tighten the wing nut to fix there, swivel confirm the handle becomes free to turn around.

Installing Guard

WARNING

POTENTIAL HAZARD

• Foreign objects can be thrown by Trimmer/Brushcutter.

WHAT CAN HAPPEN

- Contact with thrown objects can cause personal injury.

HOW TO AVOID THE HAZARD

- Never operate the Trimmer/Brushcutter without the shield in place.

Blade Shield

Attach the blade shield to the gearcase with the two M6 × 30 screws as shown on Fig.1.

CAUTION

POTENTIAL HAZARD

• The cutoff blade is sharp.

WHAT CAN HAPPEN

Contact with cutoff blade could cause serious cuts or personal injury.

HOW TO AVOID THE HAZARD

- Keep hands, feet and clothing away from cutoff blade.

Trimmer Head Shield

(Install the string cutoff blade and shield extension to the blade shield.)

1. Insert the square nut into shield extension as shown on Fig.2
2. Attach the String Cutoff Blade to shield extension using M5 × 20 Screw, locking with square nut (on Fig.2) as shown on Fig.3
3. Enter the shield extension guide in the slot of Blade Shield. Make sure to place the three hooks into the position on the shield as shown on Fig.5.

Installing Cutting Attachment

Trimmer Head

WARNING

POTENTIAL HAZARD

• If the trimmer head is not adequately tightened, it can come loose from the Trimmer/Brushcutter during use.

WHAT CAN HAPPEN

- This may cause damage to property or personal injury.

HOW TO AVOID THE HAZARD

• Make sure the trimmer head is securely fastened to the attaching shaft in the gearcase.

IMPORTANT: Make sure the trimmer head is for LEFT-HAND ROTATION (counterclockwise) as viewed from the operator's position, and that the trimmer head adapter is a male, M8 left-hand thread.

1. Align the hole in the boss adapter with the guide slot in the gearcase.
2. Insert the 3.5mm pin into the hole in the boss adapter and the guide slot in the gearcase to lock the attaching shaft.
3. Thread the trimmer head adapter into the attaching shaft, then tighten the trimmer head by hand.

Note: The trimmer head adapter has left-hand thread.

1. Remove the 3.5mm pin from the boss adapter and gearcase.

Brushcutter Blade

CAUTION

POTENTIAL HAZARD

• If the Brushcutter blade is not adequately tightened, it can come loose from the Brushcutter during use.

WHAT CAN HAPPEN

° This may cause damage to property or personal injury.

HOW TO AVOID THE HAZARD

• Make sure the Brushcutter blade is securely fastened to the attaching shaft in the gearcase.

1. Remove the blade bolt, stabilizer and clamping washer from the attaching shaft out of the gearcase.

Note: The blade bolt has left-hand thread.

WARNING

POTENTIAL HAZARD

- Brushcutter blade is sharp.

WHAT CAN HAPPEN

- Contact with sharp blade can cause personal injury.

HOW TO AVOID THE HAZARD

- Wear gloves when you handle the blade.

1. Install the brushcutter blade onto the boss adapter, then reinstall the clamping washer, stabilizer and blade bolt.
2. Align the hole in the boss adapter with the guide slot in the gearcase.
3. Insert the 3.5mm pin into the hole in the boss adapter and the guide slot in the gearcase to lock the attaching shaft.
4. Tighten the blade bolt.
5. Remove the 3.5mm pin from the boss adapter and gearcase.

Attaching Shoulder Harness

WARNING

POTENTIAL HAZARD

• Without the Shoulder Harness or Strap Installed on the Trimmer/Brushcutter, the blade can produce side thrust which can expose the operator and bystanders to blade contact.

WHAT CAN HAPPEN

- Contact with Brushcutter blade can cause severe personal injury.

HOW TO AVOID THE HAZARD

- Never operate the Trimmer/Brushcutter without installing and using the Shoulder Harness or Strap.

Snap the Hook into the ring on the drive shaft. To detach the Harness quickly from the Trimmer/Brushcutter, push upward the Red-Button.

Before Operation

Oil and Fuel

! DANGER

POTENTIAL HAZARD

e In certain conditions gasoline is extremely flammable and highly explosive.

WHAT CAN HAPPEN

• A fire or explosion from gasoline can burn you, others, and cause property damage.

HOW TO AVOID THE HAZARD

• Use a funnel and fill the fuel tank outdoors, in an open area, when the engine is cold. Wipe up any gasoline that spills.

Do not fill the fuel tank completely full. Add gasoline to the fuel tank until the level is 1/4" to 1/2" (6 mm to 13 mm) below the bottom of the filler neck. This empty space in the tank allows gasoline

to expand.

• Never smoke when handling gasoline, and stay away from an open flame or where gasoline fumes may be ignited by a spark.
• Store gasoline in an approved container and keep it out of the reach of children.

• Never buy more than a 30-day supply of gasoline.

• Do not smoke near fuel.

• Mix and pour fuel outdoors and where there are no sparks or flames.
• Always shut off the engine before refueling. Never remove the fuel tank cap while the engine is running or just right after stopping the engine.

WARNING

POTENTIAL HAZARD

• Gasoline contains gasses that can build up pressure inside a gas tank.

WHAT CAN HAPPEN

* Fuel can be sprayed on you when removing gas cap.

HOW TO AVOID THE HAZARD

- Remove fuel cap slowly to avoid injury from fuel spray.

1. Always open the fuel tank cap slowly to release any possible overpressure inside the tank.
2. Do not overfill the fuel tank. Stop filling 1/4-1/2 inch (6 mm-13 mm) from the top of the tank.
3. Tighten the fuel tank cap carefully but firmly after refilling.

4. Wipe up any spilled fuel before starting the engine.

5. Move the Trimmer/Brushcutter at least 10 feet (3 m) away from the fueling location and fuel storage container before starting the engine.

Recommended Oil Type

Only use a two-cycle engine oil formulated for use in high-performance, air-cooled two-cycle engines. Maruyama brand 2-cycle oil is formulated for use in high-performance, air-cooled two-cycle engines.

IMPORTANT: Do not use National Marine Manufacturer's Association (NMMA) or BIA certified oils. This type of 2-cycle engine oil does not have the proper additives for air-cooled, 2-cycle engines and can cause engine damage.

Do not use automotive motor oil. This type of oil does not have the proper additives for air-cooled, 2-cycle engines and can cause engine damage.

Recommended Fuel Type

Use clean, fresh lead-free gasoline, including oxygenated or reformulated gasoline, with an octane rating of 87 or higher. To ensure freshness, purchase only the quantity of gasoline that can be used in 30 days. Use of lead-free gasoline results in fewer combustion chamber deposits and longer spark plug life. Use of premium grade fuel is not necessary or recommended.

Use of Fuel Additives

IMPORTANT: NEVER USE METHANOL, GASOLINE CONTAINING METHANOL, GASOHOL CONTAINING MORE THAN 10% ETHANOL, PREMIUM GASOLINE, OR WHITE GAS BECAUSE ENGINE FUEL SYSTEM DAMAGE COULD RESULT.

DO NOT USE FUEL ADDITIVES OTHER THAN THOSE MANUFACTURED FOR FUEL STABILIZATION DURING STORAGE SUCH AS MARUYAMA'S STABILIZER/ CONDITIONER OR A SIMILAR PRODUCT. MARUYAMA'S STABILIZER/CONDITIONER IS A PETROLEUM DISTILLATE BASED CONDITIONER/STABILIZER.

MARUYAMA DOES NOT RECOMMEND STABILIZERS WITH AN ALCOHOL BASE SUCH AS ETHANOL, METHANOL OR ISO-PROPYL. ADDITIVES SHOULD NOT BE USED TO TRY TO ENHANCE THE POWER OR PERFORMANCE OF MACHINE.

Mixing Gasoline and Oil

IMPORTANT: The engine used on this Trimmer/Brnshcutter is of a 2-cycle design. The internal moving parts of the engine, i.e., crankshaft bearings, piston pin bearings and piston to cylinder wall contact surfaces, require oil mixed with the gasoline for lubrication.

Failure to add oil to the gasoline or failure to mix oil with the gasoline at the appropriate ratio will cause major engine damage which will void your warranty.

For your fuel premix, use Maruyama Premium 2-cycle Oil Mix, or equivalent ISO-L-EGD & JASO FC oil with a minimum 87 octane high quality gasoline. Maruyama 2-cycle oil is specially formulated to meet the requirements of high-performance, low-emission air-cooled 2-cycle engines. Use of other oils may lead to service issues which may not be covered by your warranty.

Fuel Mixture

The fuel: oil ratio is 50 parts gasoline to 1 part oil or 50:1.

Note: Never use a mixing ratio less than 50:1 regardless of the oil package mixing instructions. Ratios less than 50:1, (for example, 60:1, 80:1, 100:1), reduce the amount of lubrication to the internal moving parts of the engine and can cause damage.

Fuel Mixture Chart

Gasoline	50:1 2-cycle oil
1 gallon	2.6 oz.
2 gallons	5.1 oz.
5 gallons	12.8 oz.
1 liter	20 ml
5 liter	100 ml

Mixing Instructions

IMPORTANT: Never mix gasoline and oil directly in the Trimmer/Brushcutter fuel tank.

1. Always mix fuel and oil in a clean container approved for gasoline.

2. Mark the container to identify it as fuel mix for the Trimmer/Brushcutter.

3. Use regular unleaded gasoline and fill the container with half the required amount of gasoline.

4. Pour the correct amount of oil into the container then add the remaining amount of gasoline.

5. Close the container tightly and shake it momentarily to evenly mix the oil and the gasoline before filling the fuel tank on the Trimmer/Brushcutter.

6. When refilling the Trimmer/Brushcutter fuel tank, clean around the fuel tank cap to prevent dirt and debris from entering the tank during cap removal.

7. Always shake the premix fuel container momentarily before filling the fuel tank.

8. Always use a spout or funnel when fueling to reduce fuel spillage.

9. Fill the tank only to within 1/4-1/2 inch (6 mm-13 mm) from the top of the tank. Avoid filling to the top of the tank filler neck.

Starting and Stopping

Before Starting the Engine

1. Fill the fuel tank as instructed in the Before Operation section of this manual. (page15)
2. Rest the Trimmer/Brushcutter on the ground.
3. Make sure the cutting attachment is clear of any broken glass, nails, wire, rocks or other debris.
4. Keep all bystanders, children and animals away from the working area.

Cold Starting Procedure

The carburetor on this engine is equipped with a fuel primer and a choke system. To start a "cold" engine properly, perform the following procedure:

1. Pump the primer bulb until fuel can be seen flowing through the fuel return line to the fuel tank. (Flowing fuel should be almost clear, not foamy or full of bubbles.)
2. Turn the choke lever to the Close position.
3. With the stop switch "ON", and the throttle trigger positioned at Fast-idle position, pull the starter grip.

CAUTION

Do not pull the Starter rope all the way out.

! WARNING

Do not disassemble the Starter. Please ask for an authorized MARUYA-MA service dealer.

After the engine is started, turn the choke lever to the Open position. Then squeeze and release the throttle trigger to allow it to return to the idle position.

If the engine stops running before you turn the choke lever to the open position:

Go ahead and open the choke, pull the starter grip with the throttle trigger positioned at Fast-idle position.

Hot Restart

To start the engine that is already warmed up (hot restart), or if the ambient temperature exceeds 68^ F( 20^ C):

1. Pump the primer bulb until fuel can be seen flowing through the fuel return line to the fuel tank. (Flowing fuel should be almost clear, not foamy or full of bubbles.)
2. Turn the choke lever to the open position, and set the stop switch to the "ON" position.
3. Leave the throttle trigger in the idle position and pull the starter grip.

If the engine fails to start after you follow the above procedures, contact an authorized MARUYAMA dealer.

To Stop The Engine:

1. Release the throttle trigger.
2. Slide the stop switch to "STOP" position,

Idle Speed Adjustment

This Trimmer/Brushcutter is equipped with non-adjustable fuel mixture carburetor. The engine idle speed is the only adjustment for the operator.

WARNING

POTENTIAL HAZARD

• Engine must be running to make some carburetor adjustments.
- When engine is running, cutting head is rotating and other parts are moving.

WHAT CAN HAPPEN

• Contact with rotating cutting head or other moving parts could cause serious personal injury or death.

HOW TO AVOID THE HAZARD

• Keep hands, feet and clothing away from cutting head and other moving parts.
• Keep all bystanders and pets away from unit while making carburetor adjustments.

The cutting head may be rotating during idle speed adjustment. Wear the recommended personal protective equipment and observe all safety instructions. Keep hands and body away from the cutting head.

When the throttle trigger is released, the engine should return to an idle speed between 2400 and 2800 RPM, or just below the clutch engagement speed. The cutting head must not rotate and the engine should not stall (stop running) at engine idle speed.

To adjust the engine idle speed, rotate the idle speed adjustment screw on the carburetor.

• Turn the idle speed screw in (clockwise) to increase the engine idle speed.
• Turn the screw out (counterclockwise) to decrease the engine idle speed.

If idle speed adjustment is necessary, and after adjustment the cutting head rotates or the engine stalls, stop using the Trimmer/ Brushcutter immediately!

Contact your local authorized Maruyama Dealer for assistance and servicing.

Trimmer / Brushcutter Operation

WARNING

POTENTIAL HAZARD

• Foreign objects can be thrown by Brushcutter.

WHAT CAN HAPPEN

- Contact with thrown objects can cause personal injury.

HOW TO AVOID THE HAZARD

• Never operate the Brushcutter without the blade shield in place.

CAUTION

• Read the Safety instructions on page 6 concerning proper use of the Brushcutter.

Trimmer / Brushcutter Operating Position

Before using the Trimmer Brushcutter, check the following:

1. Make sure the Holding Tool (3.5mm Pin) has been removed from the gearcase and boss adapter before you start the engine.

WARNING

POTENTIAL HAZARD

• Without the harness installed, the Brushcutter blade can produce side thrust which can expose the operator and bystanders to blade contact.
- If the Brushcutter is not correctly positioned on the operator's right side, the blade can produce side thrust which can expose the operator and bystanders to blade contact.

WHAT CAN HAPPEN

- Contact with the Brushcutter blade can cause severe personal injury.

HOW TO AVOID THE HAZARD

• Never operate the Brushcutter without installing and using the harness.
• Always operate the Brushcutter with the unit on your right side.

1. The operator must be wearing the harness attached to the Trimmer / Brushcutter, and the Trimmer / Brushcutter must be on the operator's right side.
2. The operator's right hand should be holding the right-hand bullhorn grip, with his or her fingers on the throttle trigger.

3. The left hand should be holding the left-hand bull-horn grip with the fingers and thumb fully enclosed around the grip.

4. Always release the throttle trigger and allow the engine to return to idle speed when not cutting.

5. Stop the Trimmer / Brushcutter engine when moving between work sites.

CAUTION

• Always wear gloves and protective clothing when operating the Trimmer / Brushcutter.
- If the Cutting attachment blade becomes jammed, stop the engine immediately.
• Make certain all moving parts have stopped and disconnect the spark plug before inspecting the equipment for damage.
- Never use a Trimmer / Brnshcutter that has chipped, cracked or broken cutting attachment or shield.

IMPORTANT: To detach the harness quickly from the Trimmer / Brushcutter, push the red button.

Cutting with Nylon Trimmer Line

• The tip of the line does the cutting. The line should stay extended while cutting.

- Do not force the line into the material. Forcing the line will cause it to slap against the material, increasing line usage and causing poor cutting results.

Trimming

Hold the bottom of the trimmer head about 3 in. (7.6 cm) above the ground and at an angle. Allow only the tip of the line to make contact.

Scaling

To remove unwanted vegetation, hold the trimmer head about 3 in. (7.6 cm) above the ground and at an angle. Allow the tip of the line to strike the ground cutting the vegetation off at the surface.

Diagram of a mechanical device inserted into a circular opening, surrounded by grass and a vertical rod (no text or symbols present)

Mowing

Keep the line parallel to the ground and use a gentle side-to-side motion.

Line drawing of a manual lawn saw cutting through grass, no text or symbols present

Cutting Direction

WARNING

POTENTIAL HAZARD

• Cutting heavy brush or small trees from the wrong direction can cause the Brushcutter blade to kick back.

WHAT CAN HAPPEN

- Contact with the Brushcutter blade can cause severe personal injury.

HOW TO AVOID THE HAZARD

• Always move the Trimmer / Brushcutter from right to left when cutting heavy brush or small trees as shown.

When cutting heavy brush or small trees, always move the Brushcutter from right to left. Moving the Brushcutter from left to right can cause the blade to kick back.

Cutting Blades

1. Use only the correct blade (Maruyama genuine part) approved for the application and model Brushcutter.
2. Carefully check the condition of the blades before and after operation.
3. Sharpen dull blades. Replace any blade that is worn, cracked or damaged.
4. If a blade produces eccentric rotation or vibration, replace the blade and the boss adapter with genuine Maruyama parts.

Maintenance

Maintenance, replacement or repair of emission control devices and systems may be performed by any repair establishment or individual; however, warranty repairs must be performed by a dealer or service center authorized by Maruyama Manufacturing Company, Inc. The use of parts that are not equivalent in performance and durability to authorized parts may impair the effectiveness of the emission control system and may have a bearing on the outcome of a warranty claim.

Maintenance Interval

• The air filter should be cleaned daily, or more often when working in extremely dusty conditions.
- Replace after every 100 hours of operation.

Air Filter Cleaning

1. Loosen the knob and remove the air filter cover.
2. Remove the foam element.
3. Clean the foam element with warm, soapy water. Let the element dry completely.
4. Apply a light coat of SAE 30 motor oil to the foam element and squeeze out all excess oil.
5. Reassemble the foam element and filter cover.

Fuel Filter

Maintenance Interval

The fuel filter should be replaced after every 100 hours of operation.

Fuel Filter Replacement

The fuel filter is attached to the end of the fuel pick-up hose inside the fuel tank.

To replace the fuel filter:

1. Make sure the fuel tank is empty.
2. Remove the fuel cap.
3. Using a wire hook, gently pull the fuel filter out through the fuel filler opening.
4. Grasp the fuel hose next to the fuel filter fitting and remove the filter, but do not release the hose.
5. While still holding on to the fuel hose, attach the new fuel filter.
6. Drop the new fuel filter back into the fuel tank.
7. Make sure that the fuel filter is not stuck in a corner of the tank, and that the fuel hose is not doubled over (kinked) before refueling.

Spark Plug

Maintenance Interval

• The spark plug should be removed from the engine and checked after each 25 hours of operation.
• Replace the spark plug after every 100 hours of operation.

Spark Plug Maintenance

1. Twist the high tension lead boot on the spark plug back and forth a couple of times to loosen the boot, then pull the boot off of the spark plug.
2. Remove the spark plug.
3. Clean the electrodes with a stiff brush.

1. Adjust the electrode air gap to .024-.028 in (0.6-0.7 mm).
2. Replace the spark plug if it is oil-fouled, damaged, or if the electrodes are worn down.
3. Do not overtighten the spark plug when installing. The tightening torque is 95-148 in. lbs. (10.7-16.6 N·m).

Cylinder Cooling Fins

Maintenance Interval

• The cylinder cooling fins should be cleaned after every 25 hours of operation, or once a week, whichever comes first.
  • Air must flow freely around and through the cylinder cooling fins to prevent engine overheating. Leaves, grass, dirt and debris buildup on the fins will increase the operating temperature of the engine, which can reduce engine performance and shorten engine life.

Cooling Fin Cleaning

1. Loosen the knob and lift off the cylinder cover.
2. Clean all dirt and debris from the cooling fins and from around the cylinder base.
3. Reinstall the cylinder cover.

Spark Arrester

WARNING

POTENTIAL HAZARD

- Muffler surface becomes hot when Trimmer/Brushcutter is in operation and remains hot for some time after the engine is shut off.

WHAT CAN HAPPEN

- Contact with hot muffler surfaces could cause a burn.

HOW TO AVOID THE HAZARD

• Make sure the muffler is cool before inspecting and cleaning the spark arrester.

Maintenance Interval

• The spark arrester should be inspected and cleaned after every 25 hours of use.
- Replace the screen if it cannot be thoroughly cleaned, or if it is damaged.

Spark Arrester Maintenance

1. With the engine at ambient (room) temperature, loosen the knob and remove the air cleaner cover.
2. Loosen the knob and lift off the cylinder cover.
3. Remove a screw located on the side of the exhaust outlet holds the spark arrester in place.
4. Withdraw the spark arrester, using a suitable pair of pliers.

Note: Do not crush or distort the spark arrester flange during removal.

1. The screen can be cleaned using a non-flammable solvent and stiff wire brush.

Note: If any part cannot be thoroughly cleaned, it must be replaced.

1. To install insert the spark arrester into the exhaust outlet while aligning the holes in the arrester flange and outlet for the retaining screw. Then install the screw.

2. Reinstall the cylinder and air filter covers.

Exhaust Muffler

Maintenance Interval

The muffler should be inspected and cleaned after each 100 hours of use.

Muffler Maintenance

1. With the engine at ambient (room) temperature, loosen the knob and remove the air filter cover.

2. Loosen the knob and lift off the cylinder cover.

3. Withdraw the spark arrester using a suitable pair of pliers.

Note: Do not crush or distort the spark arrester flange during removal.

1. Remove the three socket head screws holding the muffler body from cylinder.

2. Clean exhaust port of cylinder, exhaust outlet of muffler and spark arrester with safety solvent and stiff brush.

IMPORTANT: Be careful not to allow any dirt or debris to fall into the exhaust ports, as this can cause engine damage.

1. To reassemble the muffler body to the cylinder, apply Removal Loctite to the three socket head screws, then reinstall and tighten the three screws.

2. Reinstall the spark arrester onto the muffler body, then reinstall and tighten the screw.

3. Reinstall the cylinder and air filter covers.

Gearcase

Maintenance Interval

The gearcase should be checked for lubrication after each 30 hours of use.

Gearcase Lubrication

Remove the cutting attachment and the boss adapter. Clean any dirt and debris from the area between the boss adapter and the gearcase. Remove the grease plug from the side of the gearcase.

While rotating the attaching shaft, inject lithium-base bearing lube (P/N 211337) through the plug hole until the gearcase is full. Reinstall the boss adapter and grease plug.

General Cleaning and Tightening

WARNING

POTENTIAL HAZARD

When engine is running, cutting head is rotating and other parts are moving.

WHAT CAN HAPPEN

- Contact with rotating cutting head or other moving parts could cause serious personal injury or death.

HOW TO AVOID THE HAZARD

• Always turn off your Trimmer/Brushcutter before you clean or perform any maintenance on it.

The Maruyama Trimmer/Brushcutter will provide maximum performance for many, many hours if it is maintained properly. Good maintenance includes regular checking of all fasteners for correct tightness, and cleaning the entire machine.

Blade Sharpening

IMPORTANT: Replace any blade that is worn, cracked or damaged.

IMPORTANT: Sharpen every tooth evenly so the blade rotates smoothly. If you sharpen a blade with a grinder, do not overheat the blade, and do not quench a hot blade in water to cool it.

Four-tooth Blade

Sharpen with a single-cut flat file.

Eight-tooth Blade

Sharpen with a single-cut flat file and a round file.

80-tooth Blade

Sharpen with a single-cut flat file and a round file.

Storage

For long term storage of the Trimmer/Brushcutter:

1. Empty the fuel tank into a suitable fuel storage container.
2. Pump the primer bulb on the carburetor until all fuel is discharged through the clear fuel return hose.
3. Run the engine to remove any fuel that may remain in the carburetor.
4. Perform all regular maintenance procedures and any needed repairs.
5. Remove the spark plug and squirt a very small amount of oil into the cylinder.

Technical line drawing of a mechanical assembly with no visible text or symbols

CAUTION

POTENTIAL HAZARD

• Oil may squirt out of the spark plug opening when you pull the starter grip.

WHAT CAN HAPPEN

• Oil can cause eye injuries.

HOW TO AVOID THE HAZARD

- Protect your eyes and keep your face away from the spark plug opening.

1. Pull the starter grip once.
2. Slowly pull the starter grip to bring the piston to the top of the cylinder (TDC).
3. Reinstall the spark plug.
4. Store the Trimmer/Brushcutter in a dry place away from excessive heat, sparks or open flame.

Troubleshooting

Problem	Cause	Action
Engine Will Not Start	"STOP" switch set to off positionEmpty fuel tankPrimer bulb wasn't pushed enoughEngine flooded	Move switch to "On" positionFill fuel tankPress primer bulb until fuel flows through fuel return lineUse warm engine starting procedure
Engine Will Not Idle	Idle speed set incorrectly	Set idle speed
Engine Lacks Power or Stalls When Cutting	Throttle wire has come looseDirty air filterClogged spark arrester or exhaust port	Tighten throttle wireClean or replace air filterClean Spark arrester or exhaust port

If further assistance is required, contact your local authorized Maruyama service dealer.

Specifications

	BC4250H	BCF5050H
Weight*1 (1bs)	17.9 (8.1kg)	18.5 (8.4kg)
Engine Displacement (cm3)	41.5 cm3	49.9 cm3
Anti Vibration	Dual Isolation - grip and engine mount
Carburetor	Walbro Diaphragm Type.
Ignition	Solid State
Fuel Tank Capacity (qts.)	1.06 (1.0l)	1.06 (1.0l)
Gas to Oil Ratio	50:1
Spark Plug	NGK BPM6Y
Spark Plug Gap (in.)	024 -.028 (0.6 - 0.7 mm)
EPA Approved	yes	yes

※1. Dry weight without Blade and Harness.

Maintenance Period

	Maintenance	Daily	Every 20 hours	Every 50 hours	Every 100 hours
	Check and replenish fuel
	Check for fuel leakage
	Check bolts, nuts and screws for tightness or missing
	Tighten bolts and nuts
	Clean air filter element
	Clean spark plug and adjust electrode gap
	Remove dust and dirt from cylinder fins
	Remove carbon deposits in exhaust port
	Clean spark arrester
	Replace fuel filter
	Remove carbon deposits on piston head and combustion chamber
	Remove carbon deposits in transfer ports
	Replace fuel tube, fuel tank cap gasket	It is recommended to replace every 3 years

◎: Service to be performed by an authorized Maruyama engine dealer. ■: Service more frequently under dusty conditions. NOTE:
The service intervals indicated are to be used as a guide.
Service to be performed more frequently as necessary depending on operating condition.
Use Maruyama standard 50:1 two-cycle engine oil.

Abstract logo design featuring a stylized mountain and wave-like shape (no text or symbols)

Maruyama U.S., Inc.

Post Office Box 2107

Denton, TX 76202

940-383-7400 voice

940-383-7466 fax

www.maruyama-us.com

P/N 229117-00 07.12 TAP/M