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Home›Cummins/Onan›Cummins/Onan P4500

Cummins/Onan P4500 Generator Set

The Cummins/Onan P4500 is a 3.7 kW (3.7 kVA) Unleaded Gasoline, 10% Ethanol or less prime generator set powered by a Cummins/Onan OHV 4-stroke engine. It is available at 120 V, Single Phase-phase, 60 Hz and rated 37.5 A. It holds about 0.18 L (0.0 gal) of oil, with a maximum ambient rating of 40 °C. The set measures 622×463×520 mm (24.5×18.2×20.5 in), weighs about 44 kg (97 lb) and produces 52 dBA. An integrated tank holds 12.8 L (3.4 gal), roughly 18 hours of runtime.

0.224 L
Displacement
0.181 L
Oil capacity
6
Document types

How to read your Cummins/Onan serial & model number →

Specifications

FuelUnleaded Gasoline, 10% Ethanol or less
Frequency60.0 Hz
Prime power3 kW
EmissionsEPA, CARB
Oil capacity0.181 L
Voltage options120 V
PhaseSingle Phase
Rated current37.5 A
Power factor1.0
Circuit breaker30 A
Battery voltage5 V
Max ambient40 °C
Dimensions (L×W×H)622×463×520 mm
Dry weight44 kg
Sound level52.0 dBA
Fuel tank12.8 L
Tank runtime18 hr

Engine

Cummins/Onan OHV 4-stroke
Oil capacity0.63 L
Displacement0.224 L

Maintenance & consumables

for the Cummins/Onan OHV 4-stroke
ItemSpecCapacityPart #Interval
Air filterCheck, Clean*—300 hr find
Fuel filter—300 hr find
Oil filter— find
Belt— find
CoolantCheck/Clean—
OilCheck Level, Change1.16 L—100 hr

Common questions

What engine does the Cummins/Onan P4500 use?

The Cummins/Onan P4500 is powered by the Cummins/Onan OHV 4-stroke engine.

What fuel does the Cummins/Onan P4500 use?

The Cummins/Onan P4500 runs on Unleaded Gasoline, 10% Ethanol or less.

What is the oil capacity of the Cummins/Onan P4500?

The Cummins/Onan OHV 4-stroke engine in the Cummins/Onan P4500 has an oil capacity of 0.63 liters.

Troubleshooting

10

Symptoms & remedies

SymptomCauseRemedy
ENGINE DOES NOT CRANK (ELECTRIC START)Bad battery connectionClean and tighten battery connections
ENGINE CRANKS SLOWLY (ELECTRIC START)Load is connectedDisconnect load while starting
Fouled spark plugRemove and clean or replace spark plug
ENGINE WON'T STARTLow oil levelAdd oil as necessary
BLACK EXHAUSTContact an Onan service center
ENGINE STOPSLow oil levelAdd oil as necessary
Generator set not levelMove generator set to level surface
ENGINE SURGESDirty fuel strainerHave the strainer cleaned
NO AC OUTPUTTripped AC circuit breakerRemove all loads, reset breaker, check loads for defects. Do not exceed generator set rating.
NO DC OUTPUTTripped DC circuit breakerDisconnect battery, reset breaker and have battery tested for shorts

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

80
Part #DescriptionQtySystem
0541-1340Wheel Kit1Wheel kit PartsGeek
14L-A2Battery (EGMBU/P5000e only)1Battery PartsGeek
A058U955Rev02Spark PlugSpark plug Amazon eBay PartsGeek
A058U961BATTERY5Battery Amazon eBay PartsGeek
A058V025Bougie d'allumageSpark plug Amazon eBay PartsGeek
A058V034FOAM FILTERAir filter Amazon eBay PartsGeek
A064D595OIL DRAIN BOLT WASHERGasket PartsGeek
A064D598OIL DRAIN BOLT WASHERGasket PartsGeek
A064D643CYLINDER HEAD GASKETGasket PartsGeek
A064D664STARTING MOTOR ASSEMBLYStarter PartsGeek
A064D803AIR FILTER ASSEMBLYAir filter Amazon eBay PartsGeek
A064D805STARTER PULLEYStarter PartsGeek
A064D807TEMPERATURE SENSORSensor PartsGeek
A064D834GASOLINE SENSORSensor PartsGeek
A064N124Fuel filter1Fuel filter Amazon eBay PartsGeek
A064N128FILTERFuel filter Amazon eBay PartsGeek
A069E112P11000iTF Air Filter ElementAir filter element PartsGeek
A069E131P11000iTF Carubretor KitCarburetor kit PartsGeek
A069E132P11000iTF Fuel Selector Switch KitSwitch kit PartsGeek
A069E134P11000iTF Maintenance KitMaintenance kit PartsGeek
A076K659CYLINDER HEAD COVER SEAL WASHERGasket PartsGeek
A076K669SPARK PLUGSpark plug Amazon eBay PartsGeek
A076K672EXHAUST SEAL WASHERGasket PartsGeek
A076K748AIR FILTER ELEMENTAir filter Amazon eBay PartsGeek
A076K926CARBURETOR GASKETGasket PartsGeek
A076K959INTAKE GASKETGasket PartsGeek
A076L181GASOLINE SENSOR ASSEMBLYSensor PartsGeek
A076L191SPARK PLUG WRENCHSpark plug PartsGeek
518913-01CARBURETOR JET KITService part / kit PartsGeek
A058M29050A 120V Paralleling KitService part / kit PartsGeek
A058U958P4500i/P4500iDF Key FobService part / kit PartsGeek
A058U959CONTROL MODULEService part / kit PartsGeek
A058V024High Altitude Carburetor KitService part / kit PartsGeek
A058V040TCI INDICATORService part / kit PartsGeek
A058V046BATTERY TIEService part / kit PartsGeek
A058V048FUEL TANK CAPService part / kit PartsGeek
A058V065ONE PUSH START BUTTONService part / kit PartsGeek
A064D508ECO SWITCHService part / kit PartsGeek
A064D570OIL DRAIN SOLENOIDService part / kit PartsGeek
A064D608STEEL WASHERService part / kit PartsGeek
A064D670OIL BOTTLE ASSEMBLYService part / kit PartsGeek
A064D749WATERPROOF COVERService part / kit PartsGeek
A064D801CARBURETOR CONNECTION BLOCKService part / kit PartsGeek
A064D809TRIGGERService part / kit PartsGeek
A064N094FUEL SLOTService part / kit PartsGeek
A064N100COVERService part / kit PartsGeek
A064N113BATTERY CABLEService part / kit PartsGeek
A064N115DEPUTY WIRING HARNESSService part / kit PartsGeek
A064N122CHARGERService part / kit PartsGeek
A064N164DIPSTICK ASSEMBLYService part / kit PartsGeek
A064N183OBSERVATION COVERService part / kit PartsGeek
A064N186LEFT PANELService part / kit PartsGeek
A064N193CARBON CANISTER ASSEMBLYService part / kit PartsGeek
A069E13350A 120/240V Paralleling KitService part / kit PartsGeek
A076K656CYLINDER HEAD COVER KIT ASSEMBLYService part / kit PartsGeek
A076K666CYLINDER HEAD KIT ASSEMBLYService part / kit PartsGeek
A076K677AIR INLET STUD BOLTService part / kit PartsGeek
A076K682BOLT M8*12Service part / kit PartsGeek
A076K691OIL DRAIN BOLTService part / kit PartsGeek
A076K692IGNITION COIL KIT ASSEMBLYService part / kit PartsGeek
A076K724START PULLER KIT ASSEMBLYService part / kit PartsGeek
A076K740SPARK ARRESTERService part / kit PartsGeek
A076K758CARBURETOR KIT ASSEMBLYService part / kit PartsGeek
A076K927CROSS SCREW STUD M4X6Service part / kit PartsGeek
A076K946RESONANT CAVITY KIT ASSEMBLYService part / kit PartsGeek
A076K975LEFT FRAME KIT ASSEMBLYService part / kit PartsGeek
A076L149INVERTER KIT ASSEMBLYService part / kit PartsGeek
A076L164CONTROL PANEL HOUSINGService part / kit PartsGeek
A076L174LED DATA CENTERService part / kit PartsGeek
A076L175L5-20R RECEPTACLEService part / kit PartsGeek
A076L176WHEEL KIT ASSEMBLYService part / kit PartsGeek
A076L180FUNNELService part / kit PartsGeek
A076L190DUAL-PURPOSE KNIFEService part / kit PartsGeek
A076L193DC VOLTAGE REGULATORService part / kit PartsGeek
A076L196HANDLE KIT ASSEMBLYService part / kit PartsGeek
A076L369MUFFLER COVER KIT ASSEMBLYService part / kit PartsGeek
A076L605FUEL VALVE ASSEMBLYService part / kit PartsGeek
A076L607CONTROL PANEL HOUSINGService part / kit PartsGeek
A076L608KNOB KIT ASSEMBLYService part / kit PartsGeek
A076L623RIGHT FRAME KIT ASSEMBLYService part / kit PartsGeek

Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.

Fuel consumption

RatingLoadL/hgal/h
Prime
Prime25%
Prime50%
Standby
Standby50%2.270.6
Standby100%3.410.9

Available documents

Spec sheet — 0043135 (Cummins/Onan)Spec sheet — 0059500Spec sheet — 0077418Spec sheet — onan-4500i-spec-sheet (Cummins/Onan)Operator's manual — 914-0114 Cummins EGMBT Operators Manual (4-2008) (Cummins/Onan)Reference — 0059502Owner's manual — p4500i-owners-manual (Cummins/Onan)Parts manual — 0061221Service manual — 914-0508 Onan EGMBT P24500 EGMBU P5000e (spec A) Portable Genset Service manual (10-2009) (Cummins/Onan)Service manual — onan-p4500i-inverter-portable-generator-manual-03-2021 (Cummins/Onan)

Other sets with this engine

Cummins/Onan P2500I