Onan P2500i - Generator Cummins - Free user manual and instructions

Technical Features	Portable inverter generator, 2500 W power, 4-stroke gasoline engine, air cooling.
Dimensions	Compact and lightweight, facilitating transport.
Usage	Ideal for camping, outdoor activities, and as a backup power source.
Fuel Consumption	Efficient, allowing extended use with a moderately sized fuel tank.
Maintenance	Regular oil checks, air filter cleaning, and recommended fuel system maintenance.
Safety	Equipped with overload and short-circuit protections, outdoor use recommended to avoid CO fumes.
General Information	Manufacturer warranty, availability of spare parts, and accessible technical support.

Frequently Asked Questions - Onan P2500i Cummins

How do I start the Cummins Onan P2500i generator?

Make sure the fuel tank is full. Open the fuel valve, turn the switch to the 'ON' position, then pull the starter. The generator should start after a few attempts.

What should I do if the generator does not start?

Check the oil level and fuel. Make sure the battery is charged and the starter is working properly. If the problem persists, consult the user manual for troubleshooting instructions.

How do I know if the generator is overloaded?

The generator has an overload indicator. If this indicator lights up, it means the load exceeds the generator's maximum capacity. Unplug some devices to reduce the load.

What is the capacity of this generator?

The Cummins Onan P2500i has a starting power capacity of 2,500 watts and a continuous power capacity of 2,000 watts.

How do I perform regular maintenance on the generator?

Check and change the oil regularly, clean or replace the air filter, and ensure electrical connections are clean and secure. Consult the manual for specific recommendations.

Can the generator run on E10 fuel?

Yes, the Cummins Onan P2500i can run on fuel containing up to 10% ethanol (E10). Avoid higher ethanol blends that can damage the engine.

What is the runtime of the generator on a full tank of fuel?

Runtime depends on the connected load, but generally, the P2500i can run up to 8 hours on a full tank at 25% load.

How do I store the generator when not in use?

Empty the fuel tank or add a fuel stabilizer to prevent degradation. Store the generator in a dry, cool place and protect it from moisture.

How do I reset the generator after a shutdown due to overheating?

Let the generator cool down for at least 15 minutes. Once cooled, check the oil and fuel levels before restarting the generator.

USER MANUAL Onan P2500i Cummins

WARNING: Operating, servicing, and maintaining

this equipment can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, and wear gloves or wash your hands frequently when servicing this equipment. For more information go to www.P65warnings.ca.gov. DISCLAIMERS All information, illustrations, and specications in this manual were in effect at the time of publishing. The illustrations used in this manual are intended as representative reference views only. We reserve the right to make any specication or design change without notice.

All rights reserved. No reproduction allowed in any form without written permission from without the written permission of Cummins Inc. DANGER Read this manual before using or performing maintenance on this product. Failure to follow the instructions and safety precautions in this manual can result in serious injury or death.

SAVE THESE INSTRUCTIONS

• INTRODUCTION TABLE OF CONTENTSINTRODUCTIONDISCLAIMERS p. 2
• ALL RIGHTS RESERVED p. 2
• SPECIFICATIONS p. 3
• SAFETYSAFETY DEFINITIONS p. 4
• SAFETY SYMBOLS p. 4
• SAFETY INSTRUCTIONS p. 5
• SAFETY LABELS AND DECALS p. 7
• CONTROL PANEL COMPONENTS p. 8
• LED DATA DISPLAY p. 9
• GENERATOR COMPONENTS p. 10
• ASSEMBLY CARTON CONTENTS p. 11

• ENGINE PARTS LIST p. 25
• GENERATOR EXPLODED VIEW p. 27
• GENERATOR PARTS LIST p. 28
• SCHEMATICSSCHEMATICS p. 30
• ESPAÑOL p. 31
• FRANÇAIS Copyright © 2024 Cummins Inc. A062R850 (Issue 7) 8-2024 INTRODUCTION SPECIFICATIONSSpecicationsRunning Watts: 2200Peak Watts: 2500Rated Voltage: 120VRated frequency: 60 Hz Phase: Single phaseTotal Harmonic Distortion: ≤ 3% Engine Displacement: 98 ccStarting Type: Recoil Fuel Capacity: 1 Gallon (3.8 L)Fuel Type: 87–93 octane*Oil Capacity: 0.37 US qt (0.35 L)Oil Type: 10W-30Spark Plug:A064D659 (E6RTC)Spark Plug Gap: 0.024 – 0.032 in. (0.60 – 0.80 mm)Valve Intake Clearance:0.0031 – 0.0047 in. (0.08 – 0.12 mm)Valve Exhaust Clearance:0.0051 – 0.0067 in. (0.13 – 0.17 mm)AC Grounding System: Floating neutralVoltage Regulator: DigitalAlternator Type: Permanent magnetMaximum Ambient Temperature:104°F (40°C)Certications: • EPA*Ethanol content of 10% or less. DO NOT use E15 or E85.PRODUCT REGISTRATIONTo ensure trouble-free warranty coverage, it is important you register your Cummins generator. You can register your product on-line at: www.cummins.com/support/product-registration For Your RecordsDate of Purchase:Model Number:Serial Number:Place of Purchase:IMPORTANT: Keep your purchase receipt for trouble-free warranty coverage.To register your inverter you will need to locate the following information: Model Information000000000000000Serial NumberFor Your RecordsDate of Purchase:Model Number:Serial Number:Place of Purchase:IMPORTANT: Keep your purchase receipt for trouble-free warranty coverage. 1-800-CUMMINS (1-800-286-6467) NOTICE This product is designed and rated for continuous operation at ambient temperatures up to 104°F (40°C). If needed, this product can be operated at temperatures ranging from 5°F (15°C)–122°F (50°C) for short periods. If the product is exposed to temperatures outside of this range during storage, it should be brought back within this range before operation. This product must ALWAYS be operated outdoors in a well-ventilated area and away from doors, windows, and other vents. Maximum wattage and current are subject to and limited by such factors as fuel BTU content, ambient temperature, altitude, engine conditions, etc. Maximum power decreases about 3.5% for each 1,000 feet above sea level, and will also decrease about 1% for each 10°F (6°C) above 60°F (16°C) ambient temperature.8-2024 Copyright © 2024 Cummins Inc. A062R850 (Issue 7) SAFETY SAFETY SAFETY DEFINITIONSThe words DANGER, WARNING, CAUTION and NOTICE are used throughout this manual to highlight important information. Make sure that the meanings of this safety information is known to all who operate, perform maintenance on, or are near the generator.This safety alert symbol appears with most safety statements. It means attention, be alert, your safety is involved! Please read and follow the message that follows the safety alerts symbol. DANGER Indicates a hazardous situation which, if not avoided, will result in death or serious injury. WARNING Indicates a hazardous situation which, if not avoided, could result in death or serious injury. CAUTION Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.NOTICEIndicates a situation which can cause damage to the generator, personal property, and/or the environment, or cause the equipment to operate improperly.Note: Indicates a procedure, practice or condition that should be followed for the generator to function in the manner intended.SAFETY SYMBOLSFollow all safety information contained in this manual and on the generator. Symbol DescriptionSafety Alert SymbolElectrocution HazardAsphyxiation HazardBurn Hazard. DO NOT touch hot surfaces. Electrical Shock HazardFire HazardMaintain Safe Distance Lifting HazardRead Manufacturer’s InstructionsDo Not Operate in Wet ConditionsCopyright © 2024 Cummins Inc. A062R850 (Issue 7) 8-2024 SAFETY SAFETY INSTRUCTIONSLiving AreaBasement CrawlspaceEntrywayPorchMud RoomGarageCO Detectorsin living areasOnly use OUTSIDE and FAR AWAY from windows, doors, and vents. p. 56

Exhaust (CO) NOTICE Install battery-powered carbon monoxide detectors or plug-in carbon monoxide detectors with battery back-up in living areas. Using a generator indoors CAN KILL YOU IN MINUTES.Generator exhaust contains carbon monoxide. This is a poison you cannot see or smell. DANGER NEVER use inside a homeor garage, EVEN IF doors and windows are open. Only use OUTSIDE and far away from windows, doors,and vents. DANGER Fire and electrocution hazard. DO NOT connect to a building’s electrical system unless the generator and transfer switch have been properly installed and the electrical output has been veried by a qualied electrician. The connection must isolate the generator power from utility power and must comply with all applicable laws and electrical codes. DANGER Electrocution hazard. NEVER use the generator in a location that is wet or damp. NEVER expose the generator to rain, snow, water spray, or standing water while in use. Protect the generator from all hazardous weather conditions. Moisture or ice can cause a short circuit or other malfunction in the electrical circuit.CORRECT USEExample location to reduce risk of carbon monoxide poisoning• ONLY use outside and downwind, far away from windows, doors and vents.• Direct exhaust away from occupied spacesINCORRECT USEDO NOT operate in any of the following locations:• Near any door, window, or vent• Garage• Basement• Crawl Space• Living Area• Attic• Entry Way• Porch• Mudroom8-2024 Copyright © 2024 Cummins Inc.

A062R850 (Issue 7) SAFETY

GENERAL SAFETY PRECAUTIONS

• NEVER use the generator to power medical support equipment.

• DO NOT operate the generator when you are tired or under the inuence of drugs, alcohol, or medication.

• DO NOT use generator with electrical cords which are worn, frayed, bare, or otherwise damaged. ALWAYS use grounded extension cords.

• All electrical tools and appliances operated from this generator must be properly grounded by use of a third wire or be double-insulated.

• When a generator is used to supply a building wiring system the generator must be installed by a qualied electrician and connected to a transfer switch as a separately derived system in accordance with NFPA 70, National Electrical Code.

• If you begin to feel sick, dizzy, or weak while using the generator, move to fresh air IMMEDIATELY. See a doctor, as you can have carbon monoxide poisoning.

• Only use OUTSIDE and far away from windows, doors, and vents as recommended by the US Department of Health and Human Services Centers for Disease Control and Prevention. Your specic home and/or wind conditions may require additional distance.

• While operating and storing, keep at least ve feet of clearance on all sides of the generator, including overhead. Allow the generator to cool a minimum of 30 minutes before storage. Heat created by the mufer and exhaust gases could be hot enough to cause serious burns and/or ignite combustible objects.

• DO NOT touch the mufer or engine. They are very HOT and will cause severe burns. DO NOT put body parts or any ammable or combustible materials in the direct path of the exhaust.

• ALWAYS remove any tools or other service equipment used during maintenance away from the generator before operating.

• Avoid skin contact with engine oil or gasoline. Wear protective clothing and equipment. Wash all exposed skin with soap and water. FUEL SAFETY

• Store fuel in a container approved for gasoline.

• Only ll fuel tank with gasoline.

• Keep sparks, open ames or other form of ignition (such as match, cigarette, static electric source) away when refueling.

• DO NOT allow the generator’s gas tank to overow when lling.

• Check for fuel leaks after refueling. NEVER operate the engine if a fuel leak is discovered.

• Shut down the engine and allow it to cool for two minutes before adding gasoline or oil to the generator.

• NEVER remove the fuel cap when the generator is running. Shut off the engine and allow the unit to cool at least ve minutes. Remove the fuel cap slowly to release pressure, keep fuel from escaping around the cap, and to avoid the heat from the mufer igniting fuel vapors. Tighten the fuel cap securely after refueling.

• Wipe spilled fuel from the unit. NEVER attempt to burn off spilled fuel.

• NEVER overll the fuel tank. Leave room for fuel to expand. Overlling the fuel tank can result in a sudden overow of gasoline and result in spilled gasoline coming in contact with HOT surfaces.

• Spilled fuel can ignite. If fuel is spilled on the generator, wipe up any spills immediately. Dispose of rag properly. Allow area of spilled fuel to dry before operating the generator.

• Wear eye protection while refueling.

• NEVER use gasoline as a cleaning agent.

• Store any containers containing gasoline in a well- ventilated area, away from any combustibles or source of ignition. DO NOT store gasoline near furnaces, water heaters, or any other appliances that produce heat or have automatic ignitions.

• NEVER touch an operating inverter if the inverter is wet or if you have wet hands.

• NEVER operate the inverter in highly conductive areas such as around metal decking or steel works.

• NEVER touch live terminals or bare wires while the inverter is operating.

• NEVER modify the inverter.

• NEVER operate the inverter if it vibrates at high levels, if engine speed changes greatly, or if the engine misres often.

• ALWAYS disconnect tools or appliances from the inverter before starting.

• NEVER operate the inverter if powered items overheat, electrical output drops, there is sparking, ames or smoke coming from the inverter, or if the receptacles are damaged.Copyright © 2024 Cummins Inc. A062R850 (Issue 7) 8-2024 SAFETY GASOLINE AND GASOLINE VAPOR (GAS) DANGER Fire and explosion hazard. Gasoline is highly explosive and ammable and can cause severe burns or death. • In case of a gas re, do not attempt to extinguish theame if the fuel valve is in the gas position. Introducingan extinguisher to a generator with an open fuel valvecould create an explosion hazard.• Gas has a distinctive odor, this will help detect potentialleaks quickly.• Gas vapors can cause a re if ignited.• Gasoline is a skin irritant and needs to be cleaned upimmediately if it comes in contact with the skin.When starting the generator:• Make sure that the fuel cap, air lter, spark plug, fuellines, and exhaust system are properly in place.• If you spill any gasoline on the tank, allow it to fullyevaporate before operating.• Make sure the generator is on a at surface beforeoperating.When transporting or servicing the generator:• Disconnect the spark plug wire to prevent accidentalstarting.When storing the generator:• Store away from sparks, open ames, pilot lights, heat,and other sources of ignition.

SAFETY LABELS AND DECALS8-2024

Copyright © 2024 Cummins Inc.

1. ECO Mode: ECO mode minimizes fuel consumption

and noise by adjusting the engine RPM to the minimum required for the current load.

2. Parallel Operation Outlets: A compatible

Cummins Inverter Generator can be connected for additional power output.

3. 120 Volt AC, 20 Amp Duplex NEMA 5-20R

Receptacle: Receptacle can supply a maximum of

the current that can be delivered through the NEMA 5-20R receptacle to 18 Amps.

5. Ground Terminal: The ground terminal is used to

externally ground the generator.

6. Data Display: Displays remaining run time (F), power

output in kW (P), fuel level in liters (L), voltage output (V), and lifetime hours.

7. Overload Reset: The generator inverter will

automatically switch OFF all AC output to protect the generator if overloaded or if there is a short circuit in a connected appliance.

current that can be delivered through the 12 Volt DC outlet to 8 Amps.

10. USB Ports: Two-port 5V/2.1A USB outlet. Accepts

Type A USB plugs.Copyright © 2024 Cummins Inc.

is operating normally. Indicates the generator is producing electrical power at the receptacles.

2. Overload LED: Indicates that the generator is

overloaded. See OVERLOAD RESET.

3. Low Oil LED: Indicates low oil level. When the oil

level in the crankcase falls below the safe operating limit, the low oil level indicator will illuminate and the generator will automatically shut off the engine.

4. Fuel Level Indicator: Displays estimated fuel level

percentage. Four green LEDs indicate a full tank. One green LED indicates the unit is almost out of fuel. For exact fuel liters in tank, refer to the “L” number in the Data Display.

5. Power Output Indicator: Displays estimated output

percentage. For exact output, refer to the ‘P” number in the Data Display.

6. Mode Button: Push the mode button to manually

cycle through the Data Display.

7. Data Display: Displays remaining run time (F), power

output in kW (P), fuel level in liters (L), voltage output (V), and lifetime hours. DATA DISPLAY Fuel level: Displays current fuel level in liters.Remaining Run Time: Displays time remaining with current fuel level and power output. Power Output: Displays electrical power output to receptacles in kilowatts. Voltage: Displays current voltage output of inverter.Lifetime Hours: Displays the total run time of the inverter.8-2024 Copyright © 2024 Cummins Inc.

1. Engine Service Panel: Remove the panel to access

the engine for maintenance.

7. Engine Cooling Vents: Helps move airow in unit

to regulate engine temperatures. DO NOT BLOCK.

2. Model Information Label: Provides voltage/amps,

and power rating information.

8. Oil Access Cover: Remove to service oil.

3. Fuel Cap: Add unleaded gasoline here. 9. Engine Fuel Control Switch: Used to turn fuel

valve to the run, choke, or OFF position.

4. Transport Handle: Use to move and position the

10. Recoil Handle: Pull the recoil handle to manually

5. Mufer and Spark Arrestor: The spark arrestor

prevents sparks from exiting the mufer.

6. Control Panel: The control panel contains the

outlets , circuit breakers, and data display.Copyright © 2024 Cummins Inc. A062R850 (Issue 7) 8-2024 ASSEMBLY ASSEMBLY CARTON CONTENTS 1. Carefully open the carton.2. Remove and save the instruction manual, oil bottle, oilfunnel, spark plug socket wrench, screwdriver, and 12Vadapter.3. Remove and discard the packing materials.4. Unfold the top of the plastic bag enclosing the generator.5. Carefully cut the vertical corners of the carton to accessthe generator.6. Recycle or dispose of the packaging materials properly. CARTON CONTENTS

• Operator Manual• Quick Start Guide• 0.37 Quart (0.35 Liter) bottle of SAE 10W-30 Oil• Screwdriver• Spark plug socket wrench• Oil funnel• 6 mm to 12V DC adapterIf any parts are missing, contact our service team at 1-800-286-6467.

THIS GENERATOR HAS BEEN SHIPPED WITHOUT

OIL. DO NOT attempt to crank or start engine before it has been properly serviced with recommended oil. Failure to add engine oil before starting will result in serious engine damage. NOTICE Use of 2-stroke/cycle oil or other unapproved oil types can cause severe engine damage that is not covered under warranty. The included, recommended oil type for typical use is 10W-30 engine oil. If running the generator in extreme temperatures, refer to the following chart. 1. On a level surface, turn the locking knob to unlock theengine service panel.Note: Carefully pull outward in small increments to pull the panel posts from the grommets holding the panel in place. 2. Remove the oil access cover then the oil dipstick. Usingthe supplied funnel and oil, add oil into the engine.Note: As residual oil from the factory may remain in the engine, add the oil incrementally near the end of the bottle to prevent overlling the engine. See Engine Oil Level Check in the Maintenance section. 3. Replace the oil dipstick and hand-tighten.4. Replace the oil access cover and engine service panel.8-2024 Copyright © 2024 Cummins Inc. A062R850 (Issue 7) ASSEMBLY FUEL WARNING Fire and explosion hazard. NEVER use a gasoline container, gasoline tank, or any other fuel item that is broken, cut, torn or damaged. DANGER Fire and explosion hazard. DO NOT overll fuel tank. Fill only to the red ll ring located in the in-tank fuel screen lter. Overlling may cause fuel to spill onto engine causing a re or explosion hazard. DANGER Fire and explosion hazard. NEVER refuel the generator while the engine is running. ALWAYS turn the engine off and allow the generator to cool for two minutes before refueling. NOTICE E85 E15 DO NOT use E15 or E85 fuel in this product. Engine or equipment damage caused by stale fuel or the use of unapproved fuels (such as E15 or E85 ethanol blends) is not covered by warranty. Only use unleaded gasoline containing up to 10% ethanol.FUEL REQUIREMENTS• CLEAN, FRESH, unleaded gasoline, 87–93 octane.• Up to 10% ethanol (gasohol) is acceptable (whereavailable; non-ethanol fuel is recommended).• DO NOT use E85 or E15.• DO NOT use a gas oil mix.• DO NOT modify the engine to run on alternate fuels.• DO NOT fuel indoors.• DO NOT create a spark or ame while fueling.USING FUEL STABILIZERAdding a fuel stabilizer (not included) extends the usable life of fuel and helps prevent deposits from forming that can clog the fuel system. Follow the manufacturer’s instructions for use. ALWAYS mix the correct amount of fuel stabilizer to gasoline in an approved gasoline container before fueling the generator. Run the generator for ve minutes to allow the stabilizer to treat the entire fuel system.FILLING THE FUEL TANKIMPORTANT: Only add gasoline when the generator is OFF and allowed to cool for a minimum of two minutes before fueling. 1. Place the generator on level ground in a well ventilatedarea.2. Clean the area around fuel cap and remove the capslowly.NOTICEOnly ll the tank from an approved gasoline container. Make sure the gasoline container is internally clean and in good condition to prevent fuel system contamination.

3. Slowly add the recommended fuel. DO NOT overll. Fill

only to the red maximum ll ring on the fuel screen ltervisible in the ller neck. Maximum Fuel Level Screen Filter Fuel Cap 4. Install the fuel cap. Tighten until a click is heard.NOTICEFuel can damage paint and plastic. Use caution when lling the fuel tank. Damage caused by spilled fuel is not covered under warranty. NOTICEClean the fuel screen lter of debris before and after each fueling. Remove the fuel screen lter by slightly compressing it while removing it from the fuel tank.Copyright © 2024 Cummins Inc. A062R850 (Issue 7) 8-2024 OPERATION GENERATOR LOCATIONRead and understand all safety information before starting the generator. Using a generator indoors CAN KILL YOU IN MINUTES.Generator exhaust contains carbon monoxide. This is a poison you cannot see or smell. DANGER NEVER use inside a homeor garage, EVEN IF doors and windows are open. Only use OUTSIDE and far away from windows, doors,and vents. NEVER operate the generator inside any building, including garages, basements, crawlspaces, sheds, enclosure, or compartment, including the generator compartment of a recreational vehicle. DANGER Electrocution hazard. NEVER use the generator in a location that is wet or damp. NEVER expose the generator to rain, snow, water spray, or standing water while in use. Protect the generator from all hazardous weather conditions. Moisture or ice can cause a short circuit or other malfunction in the electrical circuit. Using a generator or electrical appliance in wet conditions, such as rain or snow, or near a pool or sprinkler system, or when your hands are wet, could result in electrocution WARNING Fire hazard. Only operate the generator on a solid, level surface. Operating the generator on a surface with loose material such as sand or grass clippings can cause debris to be ingested by the generator that could block cooling vents or the air intake system. Allow the generator to cool for 30 minutes before transport or storage.The generator should be on a at, level surface at all times (Even while not in operation). The generator must have at least 5 ft. (1.5 m) of clearance from all combustible material.DO NOT operate the generator in the back of a SUV, camper, trailer, truck bed (regular, at, or otherwise), under stairs, next to walls or buildings, or in any other location that will not allow for adequate cooling of the generator and/or the mufer. DO NOT contain generators during operation. DANGER Asphyxiation hazard. Place the generator in a well-ventilated area. DO NOT place the generator near vents or intakes where exhaust fumes could be drawn into occupied or conned spaces. Carefully consider wind and air currents when positioning generator.GROUNDING WARNING Shock hazard. Failure to properly ground the generator can result in electric shock.The generator neutral is oating. The generator ground terminal is connected to the frame of the generator, the metal non-current-carrying parts of the generator, and the ground terminals of each receptacle. The generator (stator winding) is isolated from the frame and from the AC receptacle ground pin. Electrical devices that require a grounded receptacle pin connection may not function properly. If this generator will be used only with cord and plug equipment connected to the receptacles mounted on the generator, National Electric Code does not require that the unit be grounded. However, other methods of using the generator may require grounding to reduce the risk of shock or electrocution. NOTICEOnly use grounded 3-prong extension cords, tools, and appliances, or double-insulated tools and appliances.Before using the ground terminal, consult a qualied electrician, electrical inspector, or local agency having jurisdiction for local codes or ordinances that apply to the intended use of the generator.HIGH ALTITUDE OPERATIONEngine power is reduced the higher you operate above sea level. Output will be reduced approximately 3.5% for every 1000 feet of increased altitude from sea level. High altitude adjustment is required for operation at altitudes over 2,000 ft. (762 m). Operation without this adjustment will cause decreased performance, increased fuel consumption, and increased emissions. High Altitude Carburetor Kit: Part# A066Z194 NOTICEDO NOT operate the generator at altitudes below 2,000 ft. (762 m) with the high altitude kit installed. Engine damage may occur. OPERATION8-2024 Copyright © 2024 Cummins Inc. A062R850 (Issue 7) OPERATION BREAK-IN PERIOD For proper break-in, do not exceed 50% of the rated running watts (1100 watts) during the rst ve hours of operation. Vary the load occasionally to allow stator windings to heat and cool and help seat the piston rings.

If the generator will be used on an infrequent or intermittent basis (more than one month before next use), refer to the Storage section of this manual for information regarding fuel deterioration.

BEFORE STARTING THE GENERATOR

Verify that:• The generator is placed in an safe, appropriate location.• The generator is on a dry, at, and level surface.• The engine is lled with oil.• Gasoline is in the fuel tank.• All loads are disconnected.• The ECO switch is in the OFF position. DANGER Fire and explosion hazard. DO NOT move or tip the generator during operation.

1. For cold starting, turn the engine fuel control switch tothe CHOKE position.Note: If you are restarting with the engine warm from operation, turn the switch to RUN.2. Firmly grasp and pull the recoil handle slowly until youfeel increased resistance, then pull rapidly.3. After the engine starts, turn the fuel switch to the RUNposition.

1. Turn off and unplug all connected electrical loads.NEVER start or stop the generator with electricaldevices attached.2. Let the generator run with no load for several minutes tostabilize internal temperatures.3. Turn the fuel switch to the OFF position.Note: If there is an emergency and the inverter must be stopped quickly, immediately move the fuel switch to the OFF position. ECO MODE NOTICE ALWAYS start the generator with ECO MODE OFF. Allow the engine speed to stabilize and the OUTPUT READY LED to illuminate before switching ECO MODE ON. NOTE: DO NOT use ECO MODE when in parallel operation. ECO MODE minimizes fuel consumption and noise by adjusting the engine RPM to the minimum required for the current load.Copyright © 2024 Cummins Inc. A062R850 (Issue 7) 8-2024 Turn ECO MODE ON when powering small appliances with continuous loads such as a computer or electric light. Turn ECO MODE OFF when powering large surge loads such as an air conditioner or electric pump. To turn on ECO MODE, verify that the OUTPUT READY LED is illuminated green, then push the switch to the ON position. If no load is present, the generator RPM will drop to idle speed. The generator will detect loads as they are applied and increase engine RPM. To run the generator at maximum power and RPM, push the ECO MODE switch to the OFF position.

The circuit breaker will automatically switch OFF if there is a short circuit, a signicant overload of the generator at the receptacle, or if the combined load exceeds 18 Amps. If the AC circuit breaker switches OFF automatically, check that the appliance is working correctly and it does not exceed the rated load capacity of the circuit before resetting the circuit breaker. Push to Reset

OFF OVERLOAD RESET The generator will automatically switch OFF all AC output to protect the generator if overloaded or if there is a short circuit in a connected appliance. However, the engine will continue to run. Marginal overloading that temporarily illuminates the OVERLOAD LED may shorten the service life of the generator. OVERLOAD on the control panel will illuminate red and the green OUTPUT READY will be OFF. To restore AC output: 1. Turn off and unplug all connected electrical loads.2. Push the RESET button on the control panel until theOVERLOAD LED goes OFF and the OUTPUT READYLED is illuminated.3. Reset the circuit breaker if OFF.4. Verify that the intended running and surge loads do notexceed the generator’s capacity.5. Reconnect electrical loads sequentially, allowing thegenerator to stabilize after each load is connected. GENERATOR CAPACITY NOTICE DO NOT overload the generator’s capacity. Exceeding the generator’s wattage/amperage capacity can damage the generator and/or electrical devices connected to it.Make sure the generator can supply enough continuous (running) and surge (starting) watts for the items you will power at the same time. The total power requirements (Volts x Amps = Watts) of all appliances connected must be considered. Appliance and power tool manufacturers usually list rating information near the model or serial number.To determine power requirements:1. Select the items you will power at the same time.2. Total the continuous (running) watts of these items. Thisis the amount of power the generator must produceto keep the items running. See the wattage referencechart on the next page.3. Estimate how many surge (starting) watts you will need.Surge wattage is the short burst of power needed tostart electric motor-driven tools or appliances such as acircular saw or refrigerator. Because not all motors startat the same time, total surge watts can be estimatedby adding only the item(s) with the highest additionalsurge watts to the total rated watts from step 2.Example:Tool or ApplianceRunning Watts*Starting Watts*TV (Tube Type) 300 0RV Refrigerator 180 600Radio 200 0Light (75 Watts) 300 0Coffee Maker 600 01580 Total Running Watts* Highest Starting Watts*Total Running Watts 1580Highest Starting Watts + 600Total Starting Watts Needed 2180*Wattages listed are approximate. Verify actual wattage. OPERATION8-2024 Copyright © 2024 Cummins Inc. A062R850 (Issue 7) OPERATION POWER MANAGEMENT To prolong the life of the generator and attached devices, use care when adding electrical loads to the generator. There should be nothing connected to the generator outlets before starting the engine. The correct and safe way to manage generator power is to sequentially add loads as follows:1. With nothing connected to the generator, start theengine as described in this manual.2. Plug in and turn on the rst load, preferably the largestload you have.3. Permit the generator output to stabilize (engine runssmoothly and attached device operates properly).4. Plug in and turn on the next load.5. Again, permit the generator to stabilize.6. Repeat steps 4 and 5 for each additional load.Wattage ReferenceTool or ApplianceEstimated Running Watts*Estimated Starting Watts*Incandescent Lights (4 Quantity x 75 Watts)300 0TV (Tube Type) 300 0Sump Pump (1/3 hp) 800 1300Refrigerator or Freezer 700 2200Well Pump (1/3 hp) 1000 2000Radio 200 0Drill (3/8”, 4 amps) 440 600Circular Saw (Heavy Duty, 7-1/4”)1400 2300Miter Saw (10”) 1800 1800Table Saw (10”) 2000 2000*Wattages listed are approximate. Verify actual wattage. EXTENSION CORDS WARNING Asphyxiation hazard. Extension cords running directly into the home increase the risk of carbon monoxide poisoning through any openings. If an extension cord running directly into your home is used to power indoor items, there is a risk of carbon monoxide poisoning to people inside the home. ALWAYS use battery-powered carbon monoxide detector(s) that meet current UL 2034 safety standards when running the generator. Regularly check the detector(s) battery. WARNING Asphyxiation hazard. When operating the generator with extension cords, make sure the generator is located in an open, outdoor area, at least 20 ft. (6 m.) from occupied spaces with exhaust pointed away. WARNING Fire and electrocution hazard. NEVER use worn or damaged extension cords. Damaged or overloaded extension cords could overheat, arc, and burn resulting in death or serious injury. Before connecting an AC appliance or power cord to the generator:• Use grounded 3-prong extension cords, tools, andappliances, or double-insulated tools and appliances.• Make sure the tool or appliance is in good workingorder. Faulty appliances or power cords can create apotential for electric shock.• Make sure the electrical rating of the tool or appliancedoes not exceed the rated power of the generator or thereceptacle being used.EXTENSION CORD SIZINGOnly use grounded 3-prong extension cords marked for outdoor use that are rated for the electrical load.

Total AmperageUp to 10AUp to 15AUp to 20AUp to 50 FT (15 M) Minimum Gauge, Outdoor RatedUp to 100 FT (30 M)Up to 30AUp to 35A

6Copyright © 2024 Cummins Inc. A062R850 (Issue 7) 8-2024 PARALLEL OPERATION WARNING Fire and electrocution hazard. NEVER connect or disconnect the parallel cord leads when a generator is running. NOTICE Connecting to a generator that is not compatible can cause a low voltage output that can damage tools and appliances powered by the generator. Parallel operation gives you the ability to link the P2500i to an additional P2500i Inverter Generator for combined running and peak power output. A Cummins 30A Parallel Kit (purchased separately) is required for parallel operation. NOTE: DO NOT use ECO MODE when in parallel operation.

1. On both generators, make sure the engine/fuel knob

and the ECO MODE switch are in the OFF position.2. Connect two parallel cable leads to the parallel outletson the rst generator, then connect the opposite cableleads to the other generator’s parallel outlets.Note: If powering devices directly from the generators (not connected to a building’s transfer switch), you do not need to match the left/right cables to the generator’s parallel outlets. 3. Start one of the generators and wait until the OUTPUTREADY LED illuminates.4. Start the second generator and wait until the OUTPUTREADY LED illuminates before connecting a load.5. Connect additional loads as described in PowerManagement section.6. Unplug all loads before stopping the generators. TRANSPORTING

• Allow the generator to cool a minimum of 30 minutesbefore transporting.• Replace all protective covers on the generator controlpanel.• Only use the generator’s xed handle to lift the unit orattach any load restraints such as ropes or tie-downstraps. DO NOT attempt to lift or secure the generatorby holding onto any of its other components.• Keep the unit level during transport to minimize thepossibility of fuel leakage or, if possible, drain the fuelor run the engine until the fuel tank is empty beforetransport. OPERATION8-2024 Copyright © 2024 Cummins Inc.

A062R850 (Issue 7) MAINTENANCE MAINTENANCE MAINTENANCE SCHEDULE Regular maintenance will improve performance and extend the service life of the generator. Follow the hourly or calendar intervals, whichever occurs rst. More frequent service is required when operating in adverse conditions as noted below. Before Each Use Check engine oil After First 25 Hours or First Month Change engine oil After 50 Hours or Every 6 Months Change engine oil

After 100 Hours or Every 6 Months Inspect/clean spark arrestor Inspect/clean spark plug Replace fuel lter

Inspect/adjust valve clearance

Change oil every month when operating under heavy load or in high temperatures.

Clean more often under dirty or dusty conditions. Replace air lter if it cannot be adequately cleaned.

Recommend service to be performed by authorized Cummins service dealer.

MAINTENANCE REPLACEMENT PARTS

Remove the engine service panel to access the air lter, carburetor, oil ll/drain, and oil dipstick.

1. On a level surface, turn the locking knob to unlock the

engine service panel.

2. Carefully pull outward in small increments to pull the

panel posts from the grommets holding the panel in place.

AIR FILTER MAINTENANCE

WARNING Fire hazard. NEVER use gasoline or other ammable solvents to clean the air lter. Use only household detergent soap to clean the air lter. The air lter must be cleaned after every 50 hours of use or six months (frequency should be increased if the generator is operated in a dusty environment).

1. Place the generator on a level surface and allow the

engine to cool for several minutes.

2. Remove the engine service panel.

3. Remove the screw securing the air cleaner cover. Tip

the cover down to remove. Screw Note: The air lter element is oil soaked. Use an appropriate cleaning container.Copyright © 2024 Cummins Inc. A062R850 (Issue 7) 8-2024 MAINTENANCE NOTICE Avoid skin contact with engine oil. Wear protective clothing and equipment. Wash all exposed skin with soap and water.4. Remove the foam air lter from the air cleaner housingand wash it by submerging the element in a solutionof household detergent soap and warm water. Slowlysqueeze the foam to thoroughly clean. NOTICE DO NOT twist or tear the foam air lter element during cleaning or drying. Only apply slow but rm squeezing action.5. Rinse the air lter element by submerging it in freshwater and applying a slow squeezing action. Allow thelter to dry thoroughly. NOTICE DO NOT pollute. Follow the guidelines of the EPA or other governmental agencies for proper disposal of hazardous materials. Consult local authorities or reclamation facility.6. Dip the foam air lter in clean engine oil then squeezeout all excess oil. The engine will smoke when started iftoo much oil is left in the lter.7. Install the foam air lter in the housing and reinstall theair cleaner cover.8. Install the engine service panel.

ENGINE OIL LEVEL CHECK

CAUTION Avoid skin contact with engine oil. Wear protective clothing and equipment. Wash all exposed skin with soap and water. NOTICE ALWAYS use the specied engine oil. Failure to use the specied engine oil can cause accelerated wear and/or shorten the life of the engine. When using the generator in dirty, dusty conditions or in extremely hot weather, change the oil more frequently. Ambient air temperature will affect engine oil performance. Change the type of engine oil used based on weather conditions.Check the engine oil level before each use or every 8 hours of operation.1. Place the generator on a level surface and allow theengine to cool for several minutes.2. Remove the engine service panel and oil access cover.3. With a damp rag, clean around the oil dipstick.4. Remove the oil dipstick and wipe the dipstick clean.5. Insert the dipstick into the oil ller neck without screwingit in. Remove the dipstick and verify that the oil levelis within safe operating range between the low (L) andhigh (H) marks on the dipstick.Safe Operating Range

6. If low, add recommended engine oil incrementally andrecheck until the level is between the L (low) and H(high) marks on the dipstick. DO NOT overll. If over thefull mark on dipstick, drain the oil to reduce oil level tothe full mark on dipstick.7. Replace the oil dipstick and hand-tighten.8. Install the oil access cover and engine service panel.8-2024 Copyright © 2024 Cummins Inc. A062R850 (Issue 7) MAINTENANCE

WARNING Accidental start-up. Remove the spark plug boot from the spark plug when performing maintenance on the generator. When using the generator in dirty, dusty conditions or in extremely hot weather, change the oil more frequently. Change the oil while the engine is still warm from operation. 1. Place the generator on a level surface and allow theengine to cool for several minutes.Note: Placing the generator on a raised surface slightly above the oil collection pan will facilitate draining. 2. Remove the engine service panel and oil access cover.Disconnect the spark plug wire from the spark plug andplace the wire where it cannot contact the spark plug.3. With a damp rag, clean around the oil dipstick. Removethe dipstick and wipe clean.4. Place an oil collection pan (or suitable container) underthe oil ll/drain hole.5. Tilt the generator to drain the oil.6. Slowly pour oil into the oil ll opening until oil the levelis between the L and H marks on the dipstick. Stopfrequently to check the oil level. Before each check,wipe the dipstick clean then fully thread the dipstick intothe oil ller neck. Remove the dipstick and check the oillevel. DO NOT overll.Maximum oil capacity: 0.37 US qt (0.35 L)7. Replace the dipstick and hand-tighten.8. Connect the spark plug wire. Install the oil access coverand engine service panel. NOTICE DO NOT pollute. Follow the guidelines of the EPA or other governmental agencies for proper disposal of hazardous materials. Consult local authorities or reclamation facility.

SPARK PLUG MAINTENANCE

INVERTERS NOTICE Always use the Westinghouse OEM or compatible resistor-type spark plug. Use of a non-resistor spark plug can result in rough idling, misre, or damage to generator components.Inspect and clean the spark plug after every 100 hours of use or six months. Replace the spark plug after 300 hours of use or every year.1. Place the generator on a level surface and allow theengine to cool.2. Remove the engine service panel.3. Remove the spark plug boot by rmly pulling the bootdirectly away from the engine.Spark Plug Boot4. Clean the area around the spark plug.5. Remove the spark plug with the included spark plugsocket wrench. NOTICE NEVER apply any side load or move the spark plug laterally when removing the spark plug. 6. Inspect the spark plug. Replace if electrodes arepitted, burned, or the insulator is cracked. Only use arecommended replacement spark plug.7. Measure the spark plug electrode gap with a wire-typefeeler gauge. If necessary, correct the gap by carefullybending the side electrode.Copyright © 2024 Cummins Inc. A062R850 (Issue 7) 8-2024 MAINTENANCE Spark plug gap: 0.024 - 0.032 in. (0.60 - 0.80 mm)0.024 - 0.032 in. (0.60 - 0.80 mm)Insulator Side Electrode8. Carefully install the spark plug nger tight, then tightenas additional 3/8 to 1/2 turn with the spark plug wrench.9. Install the spark plug boot and engine service panel.

SPARK ARRESTOR SERVICE

Check and clean the spark arrestor after every 100 hours of use or six months. Failure to clean the spark arrestor will result in degraded engine performance. 1. Place the generator on a level surface and allow themufer to cool before servicing the spark arrestor.2. Remove the cover screws, mufer cover, and sparkarrestor.Spark Arrestor3. Carefully remove the carbon deposits from the sparkarrestor screen with a wire brush. The spark arrestormust be free of breaks and tears. Replace the sparkarrestor if damaged.4. Reinstall the spark arrestor and mufer cover. STORAGE Proper storage preparation is required for trouble-free operation and generator longevity. NOTICE Gasoline stored for as little as 30 days can deteriorate, causing gum, varnish, and corrosive buildup in fuel lines, fuel passages and the engine. This corrosive buildup restricts the ow of fuel, which can prevent the engine from starting after a prolonged storage period. The use of fuel stabilizer signicantly increases the storage life of gasoline. Full-time use of fuel stabilizer is recommended. Follow the manufacturer’s instructions for use. STORAGE TIME RECOMMENDED PROCEDURELess than 1 month No service required.2 to 6 monthsFill with fresh gasoline and add gasoline stabilizer. Drain the carburetor oat bowl.6 months or longerDrain the fuel tank and carburetor oat bowl. SHORT TERM STORAGE• Allow the generator to cool a minimum of 30 minutesbefore storage.• Replace all protective covers on the generator controlpanel.• Wipe the generator with a moist cloth. Clean any debrisfrom the air inlets on the front of the unit and mufercooling vents.• Store the generator in a well-ventilated, dry locationaway from sparks, open ames, pilot lights, heat, andother sources of ignition such as areas with a spark-producing electric motor or where power tools areoperated.• DO NOT store the generator or gasoline near furnaces,water heaters, or any other appliances that produceheat or have automatic ignitions.• With the engine and exhaust system cool and allsurfaces dry, cover the generator to keep out dust. DONOT use a plastic sheet as a dust cover. Non-porousmaterials trap moisture and promote rust and corrosion.

Even properly stabilized fuel can leave residue and cause corrosion if left long term. If storing the generator for two to six months, drain the oat bowl to prevent gum and varnish buildup in the carburetor.8-2024 Copyright © 2024 Cummins Inc.

1. Remove the engine service panel.

2. Locate the drain hose extending from the bottom of the

carburetor oat bowl. Suitable Fuel ContainerFloat BowlDrain ScrewDrain Hose

3. Place the loose end of the hose outside the generator

into an approved gasoline container to catch the drained fuel.

4. Loosen the oat bowl drain screw and allow the fuel to

drain. Tighten the oat bowl drain screw.

5. Route the drain hose between the air cleaner housing

and the engine service panel. Install the engine service panel.

DRAINING THE FUEL TANK

If storing the generator for longer than six months, drain the fuel tank to prevent fuel separation, deterioration, and deposits in the fuel system.

1. Unscrew the fuel tank cap. Remove the fuel screen lter.

2. Using a commercially available gasoline hand pump

(not included), siphon the gasoline from the fuel tank into an approved gasoline container. DO NOT use an electric pump.

3. Reinstall the fuel screen lter and the fuel tank cap.

4. Start the generator and allow it to run until the generator

engine stops. Remove the spark plug.

5. Put a teaspoon of engine oil into the cylinder and

pull the recoil handle until resistance is felt. At this position the piston is coming up on its compression stroke and both valves are closed. Storing the engine in this position will help prevent internal corrosion. Return the recoil handle gently.

6. Reinstall the spark plug. Leave the spark plug boot

disconnected to prevent accidental starting. Install the engine service cover. VALVE CLEARANCE NOTICE Checking and adjusting valve clearance must be done when the engine is cold.

1. Remove the rocker arm cover and carefully remove

the gasket. If the gasket is torn or damaged, it must be replaced.

2. Remove the spark plug so the engine can be rotated

3. Rotate the engine to top dead center (TDC) by pulling

the recoil handle slowly. Looking through the spark plug hole, the piston should be at the top (both valves are closed).

4. Both the rocker arms should be loose at TDC on the

compression stroke. If they are not, rotate the engine 360°.

5. Insert a feeler gauge between the rocker arm and the

valve stem to measure valve clearance. Pivot Adjusting NutValve StemRocker ArmRocker Arm PivotIntake Valve Exhaust ValveValve Clearance0.0031 – 0.0047 in. (0.08 – 0.12 mm)0.0051 – 0.0067 in. (0.13 – 0.17 mm)Torque

7. Turn the rocker arm pivot to obtain the specied

clearance. Hold the rocker arm pivot and re-tighten the pivot adjusting nut to the specied torque. Torque: 106 inch-pound (12 N•m)

8. Perform this procedure for the other valve.

9. Install the gasket, rocker arm cover, and spark plug.Copyright © 2024 Cummins Inc.

A062R850 (Issue 7) 8-2024 TROUBLESHOOTING TROUBLESHOOTING TROUBLESHOOTING

PROBLEM POSSIBLE CAUSE CORRECTION

Engine will not startOut of fuel. Refuel.Bad fuel, generator stored without treating or draining gasoline, or refueled with bad gasoline.Drain the fuel tank. Refuel with fresh gasoline. Dirty air lter. Clean the air lter. Low engine oil level stopped generator. If low oil LED illuminated, add engine oil. Spark plug wet with fuel (ooded engine).Wait ve minutes. Pull recoil handle rapidly several times. If the generator does not start, remove spark plug and dry. Spark plug faulty, fouled, or improperly gapped. Gap or replace the spark plug. Reinstall.Fuel lter restricted, fuel system malfunction, fuel pump failure, ignition malfunction, valves stuck, etc. Contact Cummins support toll-free at 1-800-CUMMINSChoke partially open or closed.Manually set the choke. See Maintenance section.Engine starts, then shuts downOut of fuel. Refuel.Incorrect engine oil level. Check engine oil level. Dirty air lter. Clean the air lter. Contaminated fuel. Drain the fuel tank. Refuel with fresh gasoline.Defective low oil level switch.Contact Cummins support toll-free at 1-800-CUMMINSEngine lacks powerAir lter restricted. Clean or replace air lter.Bad fuel, generator stored without treating or draining gasoline, or refueled with bad gasoline.Drain the fuel tank. Refuel with fresh gasoline. Fuel lter restricted, fuel system malfunction, fuel pump failure, ignition malfunction, valves stuck, etc. Contact Cummins support toll-free at 1-800-CUMMINSEngine runs rough or bogs when load appliedDirty air lter. Clean the air lter. Generator overloaded. Unplug some devices.Faulty power tool or appliance.Replace or repair tool or appliance. Stop and restart the engine. Fuel lter restricted, fuel system malfunction, fuel pump failure, ignition malfunction, valves stuck, etc. Contact Cummins support toll-free at 1-800-CUMMINSNo power at AC receptaclesOUTPUT READY LED is OFF and OVERLOAD LED is ON.Check AC load. Stop and restart engine. Check the air inlet. Stop and restart the engine. AC circuit breaker/s tripped. Check AC loads and reset circuit breaker/s.Faulty power tool or appliance.Replace or repair tool or appliance. Stop and restart the engine. Faulty generator. Contact Cummins support toll-free at 1-800-CUMMINS8-2024 Copyright © 2024 Cummins Inc.

P2500i Exploded View A (Engine)Copyright © 2024 Cummins Inc.

if applicableCopyright © 2024 Cummins Inc.

Not used on this model

Copyright © 2024 Cummins Inc.

Copyright © 2024 Cummins Inc.

Copyright © 2024 Cummins Inc.

Copyright © 2024 Cummins Inc.

Copyright © 2024 Cummins Inc.

PROBLÈME CAUSE POSSIBLE CORRECTION