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Cummins/Onan J Generator Set

The Cummins/Onan J is a 7.5 kW Gasoline/propane/natural gas standby generator set powered by a Cummins/Onan JB engine. It is available at , 3-phase and 60 Hz. It holds about 3.84 L (1.0 gal) of oil, with a maximum ambient rating of -17.8 °C. Starting uses 2 group-SAE.group tH batteries at 12 V. The set measures 1206×495×676 mm (47.5×19.5×26.6 in) and weighs about 213 kg (470 lb).

7 kW
Standby
0.9834 L
Displacement
3.84 L
Oil capacity
3
Document types

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

Specifications

FuelGasoline/propane/natural gas
Frequency60.0 Hz
Standby power7 kW
Prime power6 kW
Oil capacity3.84 L
AlternatorCummins/Onan Y0 (4-pole)
Voltage options120/240 V, 115/230 V, 110/220 V, 127/220 V, 139/240 V, 115/200 V, 120/208 V, 254/440 V, 277/480 V, 220/380 V, 230/400 V, 240/416 V
Phase3
Battery groupSAE.group tH
Battery voltage12 V
Battery quantity2
Max ambient-17.8 °C
Dimensions (L×W×H)1206×495×676 mm
Dry weight213 kg

Engine

Cummins/Onan JB
Displacement0.9834 L
AspirationAir-cooled
Rated speed1500 rpm

Maintenance & consumables

for the Cummins/Onan JB
ItemSpecCapacityPart #Interval
Air filter140-06368 hr PartsGeek
Fuel filter— find
Oil filter122-01851000 hr Amazon eBay $24.99 PartsGeek
Belt— find
Coolant—
Oil3.84 litre—50 hr

Common questions

What is the power rating of the Cummins/Onan J?

The Cummins/Onan J is rated 7 kW standby.

What engine does the Cummins/Onan J use?

The Cummins/Onan J is powered by the Cummins/Onan JB engine.

What fuel does the Cummins/Onan J use?

The Cummins/Onan J runs on Gasoline/propane/natural gas.

What alternator does the Cummins/Onan J use?

The Cummins/Onan J uses a Cummins/Onan Y0 alternator. It has 4 poles.

What oil filter does the Cummins/Onan J use?

The Cummins/Onan J uses oil filter part number 122-0185.

What air filter does the Cummins/Onan J use?

The Cummins/Onan J uses air filter part number 140-0636.

Troubleshooting

48

Fault codes

CodeMeaningRemedy
does not light when Alarm Test switch is engagedFault lamp(s) does not lightReplace defective lamp(s).
45Low oil pressure cut-offCheck crankcase oil level regularly

Symptoms & remedies

SymptomCauseRemedy
OverheatingDirty cooling surfaces, operating without the engine air housing, and incorrect installation.
No Voltage BuildupTrouble was due to lost residual in the field.Remove the exciter cover, and with the plant tuning, operate the residual reset button on the Magneciter. If output voltage won’t build up after pushing the reset button, flash the field.
Over-Voltage or Fluctuating VoltageThe Magneciter is probably defective.If the engine is operating at the correct speed, see Magneciter Troubleshooting Chart.
Generator will not build up voltage.Circuit breaker in '‘off’' or ‘tripped’?Reset and close breaker.
Open in circuit breaker.Stop plant and check breaker continuity.
No AC power to Magneciter.Check AC voltage at E1-E2 with the plant operating, should be 5 percent of the rated voltage. If not, check continuity from EyEa back to generator.
Partial loss of residual in rotor.With plant operating, jumper from E2 to heat sink of field rectifier Z until voltage begins to build up. Then remove.
Pair of field rectifiers open (either W and Z or X and Y).Test rectifiers and replace if defective.
Both field rectifiers X and Y shorted.Test rectifiers and replace if defective.
Output voltage slow to build up.Either field rectifier X or Y shorted.Test rectifiers and replace if defective.
Output voltage slow to build up and higher than rated voltage after build up.Open circuit in one or more control rectifier.Test rectifiers and replace if defective. Check soldered connections to rectifiers.
Output voltage slow to build up and 10 to 20 percent above rated voltage after build up.Open circuit in one field rectifier.Test rectifiers and replace if defective.
Output voltage builds up normally but less than rated voltage at no load and low voltage at full load.Shorted winding in control reactor.Test control reactor and replace if defective.
Output voltage builds up normally with slightly less than rated voltage at no load and 20 percent above rated voltage at full load.Compound winding S1-S2 in- stalled backward or has open circuit through one of compound windings through reactors A and B and test for continuity.
Output voltage builds up normally but 25 percent above rated voltage after build up: No regulation possible.Open circuit in control rectifier bridge.
Output voltage builds up normally but is 125 to 150 percent above rated voltage after build up.Shorted turn in gate winding Gi-G2 of reactor A or B.Test reactors A and B for shorted turns and replace if defective.
Output voltage builds up normally but 150 to 200 percent above rated voltage after build up.Control winding C1-C2 or reactor A or B polarized incorrectly.Check circuit connections of both reactors A and B.
Output voltage builds up normally but 150 to 200 percent above rated voltage after build up. No regulation possible.Shorted turn in control winding C1-C2 or reactor A or B.Check circuit connections of both reactors A and B.
Generator voltage fluctuating while engine running at constant speed.Check resistance and reset. (4)
The engine will not crank.Possible fault with control or starting system.Check for the following conditions: a. Fuse F1 has blown. Replace the fuse with one of the same type and amp rating. b. Fault circuit breaker has tripped. Service the fault, and reset the circuit breaker. c. Poor battery cable connections. Clean the battery
Indicates insufficient battery voltageBatteries not charged. Battery connections loose or dirty. Insufficient battery charging voltage (contact an Onan distributor for assistance).Contact an Onan distributor for assistance.
The engine cranks, but does not start or starts and then shuts down.Check for empty fuel tank, fuel leaks, or plugged fuel lines and correct as required. Check for dirty fuel filter and replace if necessary (see Maintenance section). Check for dirty or plugged air filter and replace if necessary (see Maintenance section). Check ignition system (see Maintenance section). Contact an Onan distributor for assistance if none of the above.
Engine runs and then shuts downEngine has exceeded normal operating speed.Contact an Onan distributor for service.
Fault lamp lights but no fault exists. Engine gauges show oil pressure.Engine sensor is faulty. Contact an Onan distributor for assistance.
No AC output voltage because the line circuit breaker (if provided) or the field circuit breaker has tripped.Determine the cause (overload or short circuit) and clear the fault. Reset the line circuit breaker and/or the field circuit breaker. Contact an Onan distributor if voltage buildup causes breaker to trip.
No AC OutputVoltage Regulator VR21 is faulty.Check voltage across TB21-3 & 4. Voltage across leads must be 7.0VDC or more. If not, check all connections against the wiring diagrams on page 7-7 and rewire as necessary. Replace the voltage regulator if the wiring is correct and there is no output voltage.
Output Voltage Is Too High Or Is Too LowEngine speed is too high or too low.Adjust engine speed according to engine service manual. 1. Engine speed is unstable, troubleshoot according to Table 4-2, Control Troubleshooting - Run Mode
Output Voltage Is UnstableThe voltage has been adjusted improperly.Adjust output voltage according to AC Control in Section 2.
Field Circuit Breaker Keeps TrippingThe rotating rectifier assembly (diodes CRi1 through CR6) is faulty.Shut down the set and check each diode according to Servicing the Generator in Section 5. Service as necessary.
Phase Currents Are UnbalancedThe connected loads are distributed unevenly among the phases.Shutdown the set and redistribute the loads so that there is a difference of less than 10 percent between phases.
Load Has A Ground Fault Or Short CircuitA load has a ground fault or short circuit.Service the faulty equipment as necessary
OverspeedOperation of overspeed switch (S5)
Low Oil PressureCheck oil level and add oil if low. Monitor oil pressure gauge. If gauge reading is within normal range, switch S4 is defective.
High Engine TemperatureCheck air inlet to make sure it is open and free of debris. Refer to engine service manual to verify operation of high engine temp switch (S6).
Low Battery VoltageA. Low charge rate.Adjust slide tap on adjustable resistor R21 for proper charge rate. Refer to Battery Charge - Rate Adjustment in Section 6.
Engine Cranks But Does Not Start1. Restricted fuel supply due to: a. Open any closed shutoff valve in the fuel line b. Fill the main fuel supply tank if the set is gasoline or propane fueled. for natural gas fueled sets, check with the gas utility. 2. The engine ignition system is malfunctioning (ignition coil, distributor, spark valves, high tension spark plugs and coil cables and timing). 3. Run relay (K12) not energized due to: a. Test solenoid K11 and wiring. b. Test run relay K12 and wiring. 4. Optional fuel solenoid (K1) not energized due to: a. Check wiring continuity of fuel solenoid circuit. b. Test fuel solenoid. 5. Optional fuel tank solenoid (K2) not energized due to: a. Check wiring continuity of fuel tank solenoid circuit. b. Test fuel tank solenoid.1a. Open any closed shutoff valve in the fuel line 1b. Fill the main fuel supply tank if the set is gasoline or propane fueled. 2. Service according to the engine service manual. 3a. Test solenoid K11 and wiring. 3b. Test run relay K12 and wiring. 4a. Check wiring continuity of fuel solenoid circuit. 4b. Test fuel solenoid. 5a. Check wiring continuity of fuel tank solenoid circuit. 5b. Test fuel tank solenoid.
Engine Starts But Stops When Switch is Released1. Low oil level. 2. Centrifugal switch (S1) faulty or out of adjustment. 3. Defective fault sensor switch (low oil pressure, high air temp., or overspeed switch). 4. Open or defective fault circuit breaker (CB4, CB5, or CB6). 5. Diode CR12 defective.1. Check oil level and add oil if low. 2. Refer to Section 6, Adjustments. 3. Refer to engine service manual. 4. Check breakers. If open, locate and correct cause of fault. 5. A good diode has a higher reading in one direction than the other. If both readings are high, or low, diode is defective.
Engine Starts But Lacks Power or Stops1. Fuel delivery to the set is inadequate. 2. Fuel is contaminated. 3. Dirty air filter. 4. The governor and carburetor fuel mixture adjustments are incorrect. 5. Gaseous fuel delivery (vapor withdrawal) to the set is inadequate. 6. Gaseous fuel delivery (vapor withdrawal) to the set is inadequate.1a. Check for and replace clogged fuel lines and filters. 1b. Measure the vertical distance between the fuel lift pump on the engine and the bottom of the dip tube in the supply tank. Make necessary provisions so that lift does not exceed 6 feet (1.8 metres). 2. Connect the set to a container of fuel of known quality and run the set under various loads. Replace the contents of the fuel supply tank if there is a noticeable improvement in performance. 3. Check air filter and clean if dirty. 4. Adjust the carburetor fuel mixture according to the engine service manual. Refer to Section 6, Adjustments, to service the automatic choke. 5. Check the gas supply pressure at the fuel inlet fitting on the skid. Make necessary provisions so that gas supply pressure is at least 10 inches (254 mm) Water Column (WC) when the set is under full load, and not more than 20 inches (508 mm) WC. (The gas supply system must be able to supply this pressure when supplying all other concurrent building loads.) 6. Check with the propane supplier or the gas utility to confirm the energy content of the gaseous fuel being used. Propane must have approximately 2500 BTU’s per cubic foot and natural gas 1000 BTU’s per cubic foot.
Engine Starts, But Lacks Power or Stops (Cont.)7. The carburetor fuel passages (gasoline-fueled sets) are clogged. 8. Fault shutdown occurs, but no fault lamp indication.7. Clean and rebuild gasoline carburetors with the appropriate carburetor kit according to the kit instructions. Adjust fuel mixture according to the engine service manual. 8. Perform lamp test by engaging Alarm Test switch. All lamps
Engine does not crank.Battery dead, loose connections, incorrect wiring, or faulty starter motor.Check 12 VDC to ground at battery BT1 and at starter motor Bl. Check B+ present at TB11, K13, S1, and M11. Check battery cables for polarity and tightness at battery and starter motor. If battery is dead, check if centrifugal switch S1 is open to ground. Replace S4 or charge battery. Jumper battery cable connection to ground at starter. Check starter motor. With S11 at START, jumper K11 contacts to starter solenoid. Start relay K11 is defective; replace it.
Engine cranks but does not start.Faulty switch or lead connections.Check 12 VDC present between start terminal on S11 and ground (TB11-1) with S11 at START. Check 12 VDC present between M11-B+ and ground TB11-1 with S11 at START. Replace faulty switch S11 if necessary. Check lead from TB12-4 to fuel pump; check fuel pump and replace if necessary.
Engine starts but stops when start switch is released.Faulty switch or lead connections.Connect voltmeter from 12 VDC to ground at battery BT1 and at starter motor Bl. Check B+ present at TB11, K13, S1, and M11. Check battery cables for polarity and tightness at battery and starter motor. If battery is dead, check if centrifugal switch S1 is open to ground. Replace S4 or charge battery. Jumper battery cable connection to ground at starter. Check starter motor. With S11 at START, jumper K11 contacts to starter solenoid. Start relay K11 is defective; replace it.
No build up of AC output voltage.Is Field Breaker CB21 on control panel ON? If not, step 2. Connect jumper wire across terminals of Field Breaker, CB21. Does AC output voltage build up? If yes, replace Field Breaker. If no, push to reset Field Breaker. Does AC output voltage build up? If yes but is high, low, unstable, or causes tripping of Field Breaker, refer to Tables B, C, or D. If no, step 4. Disconnect alternator stator leads 1 & 2 from TB21-1 and TB21-2 on VR22. Is reference voltage across 1 & 2 20 VAC or more? If not, refer to step 14.
AC output voltage builds up, but is unstable.Are there any loose or broken wires or connections on voltage regulator assembly VR22? If yes, step 3. Is W9 (exciter field) wiring harness from VR22 to End bell OK? If no, replace PC Board VR21. Do not replace the printed circuit board until the trouble not on the PC board has been located and corrected to avoid damage to new PC board.
AC output voltage builds up, but is high or low.Is set running at correct RPM? (See appropriate engine manual to set RPM) If no, step 3. Does adjustment of Voltage Adjusting knob for R22 on VR22 result in correct output voltage? If no, step 4. Does adjustment of potentiometer R26 on VR21 result in correct output voltage? If no, refer to step 5. Is correct voltage reference V4 to V1, V2, or V3 on VR21 being used? Refer to Figure 6. If no, replace voltage regulator PC board VR21. Do not replace the printed circuit board until the trouble not on the PC board has been located and corrected to avoid damage to new PC board.
AC output voltage builds up, but Field Breaker trips.Does AC output voltage build up to 140% or more of rated voltage before Field Breaker trips? If yes, are there any loose or broken wires or connections on VR22? If no, is diode CR15 on VR21 OK? If no, are T21 windings and connections OK? If no, are generator stator leads properly connected? Refer to Figure 6. Replace VR21 if necessary. Are diodes CR1, CR2, CR3, CR4, CR5, CR6 in rotating rectifier assemblies OK? Check all diodes - more than one may be defective. Is brushless exciter stator winding OK? Is generator rotor field winding OK? If no, is brushless exciter rotor windings OK?

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

Parts

250
Part #DescriptionQtySystem
101-03641 "Bearing, Precision Cam Center (Standard Only) 9 "TUBE, CRANKCASE OIL1Fluid PartsGeek
101-0386Gasket and Shim Kit, Rear Bearing Plate1Gasket PartsGeek
102-0451Gasket, Base1Gasket PartsGeek
102-04751 Gasket, Oil Base1Gasket PartsGeek
102-05491 For Optional Oil Base Heater - Begin Spec KFluid PartsGeek
102-05581 Heater, Oil Base - Optional Equipment 371Fluid PartsGeek
103-0218Gasket, Backplate1Gasket PartsGeek
103-0231Gasket, Gear Cover1Gasket PartsGeek
103-0251Gasket, Gear Cover1Gasket PartsGeek
103-0319Gasket, Gear Cover1Gasket PartsGeek
110-12232 3 GUIDE, VALVE1Gasket PartsGeek
115-0130Gasket, Rocker Cover1Gasket PartsGeek
120-0547Pump Assembly, Oil1Pump PartsGeek
120-0580Gasket Kit, Pump1Gasket PartsGeek
120-0586'TUBE, CRANKCASEOIL1Fluid PartsGeek
120-06282 Line, Oil - Rocker Cover 261Fluid PartsGeek
122-01821 Adapter, Oil Filter 71Oil filter PartsGeek
122-0185Oil Filter1Oil filter Amazon eBay $24.99 PartsGeek
122-01881 Gasket, Adapter 61Gasket PartsGeek
122-0193Filter (5-1/2" Long) - Optional1Oil filter PartsGeek
123-0191Gasket, Oil Fill Cap1Gasket PartsGeek
123-06491 Tube, Oil Fill1Fluid PartsGeek
123-06671 Gasket1Gasket PartsGeek
124-0732t 1 Tube, Nyton 16 . 149-0577 1 i Gasket, Fuel Pump Bow!1Pump PartsGeek
133-07921 Plenum, Manilold Heater - 19 503-0474 + Hose, Control to Air Cleaner1Air filter PartsGeek
140-0565Gasket, Adapter to Carburetor1Gasket PartsGeek
140-0584Gasket, Air Cleaner1Gasket PartsGeek
140-0636Element and Retainer, Air Cleaner1Air filter PartsGeek
140-0645Adapter, Air Cleaner 24 155-1239 2 Clamp, Muffler (1-5/8")1Air filter PartsGeek
140-0765Air Cleaner (Contractor Model)1Air filter PartsGeek
140-0921Gasket, Adapter to Carburetor1Gasket PartsGeek
141-0281Gasket, Carburetor Flange1Gasket PartsGeek
141-0661Seal, Rubber1Seal PartsGeek
141-0697Seal, Felt1Seal PartsGeek
141-0701Gasket, Bowl to Body1Gasket PartsGeek
141-0748Gasket Kit1Gasket PartsGeek
141-0861+ + +*Seal, Rubber Linits1Seal PartsGeek
143-0015Gasket, Fuel Inlet Valve1Gasket PartsGeek
143-0077Gasket, Bowl Ring1Gasket PartsGeek
143-0201Gasket Kit, Carburetor1Gasket PartsGeek
143-0209Gasket, Bowl Screw1Gasket PartsGeek
148-05191 1 Connector, Hose \S 41Hose PartsGeek
149-0517Gasket, Fuel Pump Bowl1Gasket PartsGeek
149-06364 1 Piste, Fuel Pump Hole1Pump PartsGeek
149-0792Gasket, Fuel Pump Mounting1Gasket PartsGeek
149-0803Pump, Fuel1Pump PartsGeek
149-0805Pump, Fuel1Pump PartsGeek
149-1048Repair Kit, Fuel Pump1Fuel pump PartsGeek
153-03251 1 Gaver Assembly. Electric 336-1551 f 1 Shoke to ignition Coil1Fluid PartsGeek
154-0463Gasket, Exhaust Manifold to Head2Gasket PartsGeek
154-07324 1 Gasket, Carburetor Flange 149-4085 i Begin Spee A1Gasket PartsGeek
154-0733Gasket, Intake Manifold1Gasket PartsGeek
154-0738Gasket, Exhaust Outlet1Gasket PartsGeek
160-0721Gasket, Backplate Opening Cover1Gasket PartsGeek
161-0062Drive End Seal1Seal PartsGeek
166-0346“Coil? Ignition ~1Fluid PartsGeek
167-0237Spark Plug1Spark plug PartsGeek
167-0241Spark Plug2Spark plug PartsGeek
167-1373Cable, Spark Plug1Spark plug PartsGeek
167-1379Cable, Spark Plug2Spark plug PartsGeek
167-1381Cable, Spark Plug1Spark plug PartsGeek
167-1384Cable, Spark Plug2Spark plug PartsGeek
167-1386Cable, Spark Plug2Spark plug PartsGeek
167-1387Cable, Spark Plug2Spark plug PartsGeek
167-1393Cable, Spark Plug1Spark plug PartsGeek
167-1395Cable, Spark Plug3Spark plug PartsGeek
168-0083Gasket Kit Set (overhaul)Gasket PartsGeek
168-0095Gasket Kit, Engine1Gasket PartsGeek
184-07384 Gasket, Exhaust Cutiet1Gasket PartsGeek
191-04192 2 Brush 509-0093 1 41 Seal, “O” Ring - Starter1Seal PartsGeek
28-30Spark plug gap ^ - g • Centrifugal switch, beaker point adjustmentSpark plug PartsGeek
309-00641 Spec A through F1Sensor PartsGeek
309-0162Switch, Hi Temperature1Sensor PartsGeek
309-0189Switch, Low Oil Pressure1Sensor PartsGeek
336-01791 Lead, Coil to Breaker Box {Magnete Ignition)1Fluid PartsGeek
420-0169CARBURETOR ADJUSTING TOOL1Carburetor adjustment wrench PartsGeek
420-06952 Line, Cylinder Head - Seguin 450-0045. 2 2 Git Pump Mounting1Pump PartsGeek
502-0313Elbow, Hose − 90° (1/8” Pipe to 1/4” Hose)4Hose PartsGeek
503-0189Clamp, Hose1Hose PartsGeek
503-0364Hose, Breather to Air Cleaner Adapter1Hose PartsGeek
503-0365Clamp, Hose1Hose PartsGeek
503-0389Hose, Breather to Air Cleaner Adapter1Hose PartsGeek
503-0395Hose, Breather to Air Cleaner Adapter1Hose PartsGeek
503-0416Hose, Breather to Air Cleaner Adapter1Hose PartsGeek
503-0471Hose, Breather to Air Cleaner Adapter1Hose PartsGeek
503-0474Hose, Control to Air Cleaner1Hose PartsGeek
503-0475Hose, Control to Air Cleaner1Hose PartsGeek
503-0476Hose, Adapter to Control1Hose PartsGeek
503-0543Hose, Breather to Air Cleaner Adapter1Hose PartsGeek
504-0007t 1 Valve, Shut-off (Puet Pump1Pump PartsGeek
507-0241Plug, Spark2Spark plug PartsGeek
509-0018Ring, "O" - Spark Plug Cables2Seal PartsGeek
509-0065Seat, "O" Ring1Seal PartsGeek
509-008416 Seal, Push Rod Shield 228Seal PartsGeek
509-00861 "Seal, Crankshaft Rear1Seal PartsGeek
509-0087Seal, Oil1Seal PartsGeek
509-00904 Seal, Oil Intake Valve (Includes Retaining Rings) 122Seal PartsGeek
509-0092Seal, Oil - Armature Shaft1Seal PartsGeek
509-0093Seal, "O" Ring - Starter Motor Mounting1Seal PartsGeek
509-0096Seal Base1Seal PartsGeek
522-0198Gasket Kit, Engine1Gasket PartsGeek
525-0137Paint, Touch-up (Green Enamel)1Fluid PartsGeek
526-0018Gasket, Flange (1-3/4)1Gasket PartsGeek FridayParts $1002.50
609-00902 4 Seal, Oit - take Valve, {Not Used on Early Models}.1Seal PartsGeek
702-04751 Gasket, Base1Gasket PartsGeek
783-0006; 1 Gauge, O8 Pressure 502-0080 1 Gasoline Engines - Spec A1Hose PartsGeek
800-0015Hose, Tank to Filter1Hose PartsGeek
803-6858% insulator, Breather Hose ~ 154-0724 Speco A Only1Hose PartsGeek
816-0212Bearing Plate Mounting "Center Main Bearing Housing Oil Base Mounting (7/16-14 x 1-1/4")Fluid PartsGeek
909-9092t } Seal, Oi - Armature Shaft1Seal PartsGeek
101-0337'Plate. Rear Bearing (Less1Service part / kit PartsGeek
101-03422 "Bolt, Center Bearing HousingService part / kit PartsGeek
101-03612 "StandardService part / kit PartsGeek
101-0361202 .020" UndersizeService part / kit PartsGeek
101-03631 "Bearing, Precision Cam Front (Standard Only) 81Service part / kit PartsGeek
101-03651 "Bearing, Precision Cam Rear (Standard Only) 8A1Service part / kit PartsGeek
102-04481 Base, Ol1Service part / kit PartsGeek
102-04761 Spec A through H1Service part / kit PartsGeek
102-0477+ Bese, Oi1Service part / kit PartsGeek
102-05391 Begin Spec K1Service part / kit PartsGeek
104-03611Service part / kit PartsGeek
104-0418Gear1Service part / kit PartsGeek
104-04202 "Washer, Crankshaft Thrust2Service part / kit PartsGeek
104-0423HEX CAP1Service part / kit PartsGeek
104-04381Service part / kit PartsGeek
104-0543Flywheel1Service part / kit PartsGeek
104-0557Service part / kit PartsGeek
104-0572Flywheel Assembly - Sets With Vacu-Flo Cooling1Service part / kit PartsGeek
104-06151Service part / kit PartsGeek
105-02051 Washer, Thrust Gear 51Service part / kit PartsGeek
105-02181 Begin Spec B 121Service part / kit PartsGeek
105-02231 . Spec A Only Yoke - Begin Spec BService part / kit PartsGeek
105-02401 Spec A through N1Service part / kit PartsGeek
105-02751 Begin Spec P1Service part / kit PartsGeek
110-08158 Screw (3/8-16 x 2"), Cylinder Head 29Service part / kit PartsGeek
110-0856a 16 Look. Valve Spring Retainer iised.on Early Models:1Service part / kit PartsGeek
110-08598 Cap, Valve Stem 118Service part / kit PartsGeek FridayParts $124.86
110-12154 StandardService part / kit PartsGeek
110-12184 Gasoline SetsService part / kit PartsGeek
110-12194 Valve, Exhaust - Stellite 7Service part / kit PartsGeek
110-12208 Retainer, Valve Spring 9 . 110-0858 16Service part / kit PartsGeek
110-1221Valve, Exhaust (Stellite)8Service part / kit PartsGeek
110-122510 Screw (3/8-16 x 4-3/4"), Cylinder Head 281Service part / kit PartsGeek
110-12824 Screw (3/8-16 x 4"), Cylinder Head 30Service part / kit PartsGeek
110-12864 Gas & Gas-Gasoline Sets 6Service part / kit PartsGeek
110-12874 StandardService part / kit PartsGeek
110-13122 Baffle, Fuel Distributing 40Service part / kit PartsGeek
110-1328QTY. USED 1 PART1Service part / kit PartsGeek
110-1392Service part / kit PartsGeek
110-1439Service part / kit PartsGeek
110-1440Service part / kit PartsGeek
110-32204 8 Retainer, Valve Spring 45 402-0361 2 Cushion. Vibration (Not1Service part / kit PartsGeek
113-01074 Standard4Service part / kit PartsGeek
114-0170Bushing, Piston Pin - Connecting Rod2Service part / kit PartsGeek
115-01278 Ball, Rocker Arm 15Service part / kit PartsGeek
115-01284 . Exhaust1Service part / kit PartsGeek
115-01294 Intake 144Service part / kit PartsGeek
115-01328 Spec A through N2Service part / kit PartsGeek
115-01378 Shield, Push Rod 21Service part / kit PartsGeek
115-01458 Rod, Valve Push (Aluminum) 18 TAPPET, VALVEService part / kit PartsGeek
115-01468 Spring, Shield Retainer REF. PARTService part / kit PartsGeek
115-0150Ball, Rocker Arm8Service part / kit PartsGeek
115-01844 • Lock, Stud 17Service part / kit PartsGeek
115-01894 Stud, Rocker Arm (2 Studs & Lock) 16AService part / kit PartsGeek
115-01958 Begin Spec P 198Service part / kit PartsGeek
115-01962 Guide, Push Rod 20Service part / kit PartsGeek
115-01972 Cover, Rocker 252Service part / kit PartsGeek
119-12192 4 Vaive. Exhaust, Stellite — 43. §20-0998 4 Stud, Intake Manifold1Service part / kit PartsGeek
120-05511 Spec A through G1Service part / kit PartsGeek
120-0555i 1 Spring, By-Pass . oe 502-0394 2 A! - Begin Spec T1Service part / kit PartsGeek
120-05621 Gasoline Sets - Spec A through N1Service part / kit PartsGeek
120-05851 Rear1Service part / kit PartsGeek
120-06011 Begin Spec H 3A 120,06021Service part / kit PartsGeek
120-06061 Gas & Gas-Gasoline SetsService part / kit PartsGeek
120-06371 Gasoline Sets - Spec P through SService part / kit PartsGeek
120-0695Line, Oil - Cyiinder Head - Begin Spec T2Service part / kit PartsGeek
120-07071 Serial #698178 through Spec P Begin Spec TService part / kit PartsGeek
123-04581 Spec A through H1Service part / kit PartsGeek
123-06451 "Tube, Breather - Spec A through S 211Service part / kit PartsGeek
123-0658“4 Cap ane indicator1Service part / kit PartsGeek
123-06981 Cap & Indicator1Service part / kit PartsGeek
123-07871 Spec J through S1Service part / kit PartsGeek
123-08651 Baffle, Breather Tube- Spec A through S BASE, OIL1Service part / kit PartsGeek
123-11681 "Cap, Breather - Begin Spec TService part / kit PartsGeek
123-11692 Adapter, PCV Valve - Begin ' Spec T 50Service part / kit PartsGeek
123-11702 Valve, PCV (Positive Crank- case Ventilator) - Begin Spec TService part / kit PartsGeek
123-12031 Cap and Yaive Assembly1Service part / kit PartsGeek
126-05391 1 Velve, By-Pass tHroUgN S (Restricted)1Service part / kit PartsGeek
1335-0791} Plenum, Manifold Heater - : Support1Service part / kit PartsGeek
134-0988r 24 850:0055 iService part / kit PartsGeek
134-1091Component 134-10911Service part / kit PartsGeek
134-1097t Baffle, Center Cylinder Mounting (1/420 x 5/8’)1Service part / kit PartsGeek
134-1404QTY. PART USED DESCRIPTIONService part / kit PartsGeek
134-1406Flywheel Assembly - Begin Spec H (Replaces assembly used Spec A-G)1Service part / kit PartsGeek
134-1431Service part / kit PartsGeek
134-1436Service part / kit PartsGeek
134-18581 Flywheel, Includes Ring Gear1Service part / kit PartsGeek
134-3081Service part / kit PartsGeek
140-07211Service part / kit PartsGeek
140-07222Service part / kit PartsGeek
140-072320Service part / kit PartsGeek
140-07401Service part / kit PartsGeek
140-0766t 1 “Spring, Shutter Control " « included in Control Assembly1Service part / kit PartsGeek
140-12671Service part / kit PartsGeek
140-12711Service part / kit PartsGeek
140-2929Service part / kit PartsGeek
140-96774 1 Conversion Kit, Of Bath1Service part / kit PartsGeek
141-0077£*Washer, Main Jet Assembly 161Service part / kit PartsGeek
141-0698Screw & Washer, Choke and4Service part / kit PartsGeek
141-0700Screw, Throttle Stop13Service part / kit PartsGeek
141-0702° Float Assembly11Service part / kit PartsGeek
141-0703141--07(32 TL~~.-oyo;10Service part / kit PartsGeek
141-0708Bowi, Fuel2Service part / kit PartsGeek
141-0710Spring, Idie Needie > F5-120716Service part / kit PartsGeek
141-0711Spring, Throttle Stop14Service part / kit PartsGeek
141-0713Part 141-071315Service part / kit PartsGeek
141-0733Spring, Main Gas Needle4Service part / kit PartsGeek
141-0734Needle. Main Gas Adjusting1Service part / kit PartsGeek
141-0747Repair Kit1Service part / kit PartsGeek
141-0793Service part / kit PartsGeek
141-0799Spring, idle Needle Gasoline and Gas20Service part / kit PartsGeek
141-0830*Valve Seat Assembly, Fuel1Service part / kit PartsGeek
141-094218Service part / kit PartsGeek
141-0961Service part / kit PartsGeek
141-0962Service part / kit PartsGeek
141-0963Service part / kit PartsGeek
141-0965Service part / kit PartsGeek
141-0967as shown on page 5, is the replacement for all straight gasolineService part / kit PartsGeek
141-0969Service part / kit PartsGeek
141-0970Service part / kit PartsGeek
1422-01835 3 Filter (5-1/2 Long) - : Head Tee - Bagin Spec1Service part / kit PartsGeek
143-0200Repair Kit, Carburetor1Service part / kit PartsGeek
143-02027 t Valve, Throttle- & 143-0221 4 ¥1Service part / kit PartsGeek
143-0231Service part / kit PartsGeek
143-0241Repair Kit, Carburetor1Service part / kit PartsGeek
143-0298Repair Kit, Carburetor1Service part / kit PartsGeek
143-0341Valve, Fuel Inlet1Service part / kit PartsGeek
144-0735+ hat and Lever, Throtile1Service part / kit PartsGeek
145-01274 8 Ball, Racker Arm 49 193-7166 2 Adapter, PCV Vaive1Service part / kit PartsGeek
145-0693Service part / kit PartsGeek
1456-0838t “Shatt, Governor - Begin Spec DB - early modeis aise order1Service part / kit PartsGeek
146-0639Service part / kit PartsGeek
146-0786+ 1 Control Assembly, Teragerature - | to Control1Service part / kit PartsGeek
148-0107Vent, Regulator1Service part / kit PartsGeek
148-0367Service part / kit PartsGeek
148-1011Service part / kit PartsGeek
15-01324 8 Spec A through oO 800-0030 & Focker Cover Mounting1Service part / kit PartsGeek
150-0075Pin, Camshaft Center1Service part / kit PartsGeek
150-0078Ring, Camshaft Center Pin1Service part / kit PartsGeek
150-07731 Plate, Governor Flyball 6 FLYBALL, GOVERNOR1Service 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
Standby

Available documents

Operator's manual — 967-0107 Onan JB JCA JCB Genset Operator's manual (08-1994) (Cummins/Onan)Operator's manual — 967-0340 Onan JC Genset Operator's Manual (7-1975) (Cummins/Onan)Parts manual — 0932-0112 Onan Post-Sale Literature Index (07-1998) (Cummins/Onan)Parts manual — 967-0220 Onan JC Genset Parts Manual (9-1989) (Cummins/Onan)Parts manual — 967-0254 Onan JB (spec A-T) JC (spec A-V) Engine Parts manual (09-1974) (Cummins/Onan)Parts manual — 967-0254 Onan JB spec A-T JC spec A-V Engine Parts manual 09-1974 text (Cummins/Onan)Parts manual — 967-0254 Onan JB spec A-T JC spec A-V Engine Parts manual indexed 09-1974 (Cummins/Onan)Parts manual — DK-Kohler (Cummins/Onan)Parts manual — F-1061 Cummins-Onan RV Green Label Parts (Filter & Tune-Up) Reference Guide (02-2010) (Cummins/Onan)Parts manual — NET-Onan (Cummins/Onan)Service manual — 900-0184 Onan YD Generators & Controls Major Service manual (10-1975) (Cummins/Onan)Service manual — 967-0120 Onan JB JC Genset Operators manual (06-1989) (Cummins/Onan)Service manual — 967-0123 Onan JB Operators Manual (2-1977) (Cummins/Onan)Service manual — 967-0500 Onan JB JC (spec A-T) Genset Service manual MAGNECITER END (11-1971) (Cummins/Onan)Service manual — 967-0500 Onan JB JC Genset Engine Genset Magneciter Service Manual 11-1971 (Cummins/Onan)Service manual — 967-0500 Onan JB JC Genset Engine Magneciter Gen-end Service Manual 11-1971 bestmanual (Cummins/Onan)Service manual — 967-0507 Onan JB JCA JCB (New Control) Genset Service manual (08-1994) (Cummins/Onan)Service manual — 967-0754 Onan JB spec A-T JC spec A-V Industrial Engine Opererators Service Manual 01-1976 (Cummins/Onan)