Service parts for the MDJF
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | diesel |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 15 kW |
| Oil capacity | 6.0 L |
| Alternator | YD (4-pole) |
| Voltage options | 120 V, 240 V |
| Phase | 1-phase |
| Battery group | IH-two in series |
| Battery voltage | 12 V |
| Battery quantity | 2 |
| Dimensions (L×W×H) | 513×20×67 mm |
| Dry weight | 865 kg |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Breather Filter Element | 123-1871 | Amazon eBay | ||
| Fuel filter | Filter, Fuel - Primary | 122-0325 | Amazon eBay $75.00 NAPA $35.18 | ||
| Oil filter | Filter, Oil | 122-0185 | Amazon Amazon eBay $19.55 eBay NAPA $12.88 | ||
| Belt | Belt, Centrifugal Water Pump | 511-0067 | Amazon eBay NAPA $4.76 |
Service intervals
10| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Crankcase oil | Change | 50 hr | First service — after first 50 hours of operation; drain while engine is still hot | |
| Cylinder head bolts and valve clearance | Adjust | 50 hr | First service — after first 50 hours on an overhauled engine | |
| Governor Linkage | Clean | 100 hr | Every 100 hours; clean plastic joint only, steel joint with graphite | |
| Water filter | Check | 100 hr | check after every 100 hours; change sooner in dirty water | |
| Oil filter | Replace | 200 hr | every 200 hours of normal operation | |
| Crankcase breather pipe | Clean | 500 hr | MDJC, MDJF Begin Spec T | |
| Valve stem tip-to-cap clearance | Check | 5000 hr | or whenever parts exposed or removed | |
| Cooling system | Clean | 12 mo | clean and flush at least once a year | |
| Heat exchanger sea water side | Clean | 12 mo | yearly; remove end caps and flush tubes | |
| Zinc pencils | Inspect | 2 mo | replace if less than half original size |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Service specifications
60| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | Brush wear limit (replace) | 5/8 | in | |
| Clearance | Camshaft end play | 0.007-0.039 | in | room temperature |
| Clearance | Center main bearing clearance (4 cylinder) | 0.0024-0.0052 | in | original |
| Clearance | Collector ring run-out | 0.002 | in | compared to generator bearing |
| Clearance | Connecting rod bearing clearance | 0.001-0.003 | in | |
| Clearance | Crankshaft end play | 0.010-0.015 | in | room temperature |
| Clearance | Main bearing clearance (1 & 2 cylinder) | 0.0014-0.0052 | in | replacement |
| Clearance | Main bearing clearance (1 & 2 cylinder) | 0.002-0.0033 | in | original |
| Clearance | Piston clearance in cylinder | 0.005-0.007 | in | 90 degrees to pin, below oil ring |
| Clearance | Ring gap | 0.010-0.020 | in | |
| Clearance | Valve clearance | .020 (0.51), .018 (0.33), .011 (0.28), .016 (0.41), .017 (0.43), .017 (0.43) | inch (mm) | engine at room temperature about 70°F (21°C) |
| Clearance | Valve guide clearance exhaust | 0.0030-0.0050 | in | |
| Clearance | Valve guide clearance intake | 0.0015-0.003 | in | |
| Clearance | Valve stem tip-to-cap clearance | 0.001-0.005 | in | |
| Gap | Breaker point gap (MAJ) | 0.022 | inch (0.56 mm) | full separation |
| Gap | Breaker point gap (MCCK) | 0.020 | inch (0.51 mm) | |
| Gap | Centrifugal switch gap | 0.020 | in | |
| Gap | Centrifugal switch gap | 0.020 (0.51 mm) | in | |
| Gap | Centrifugal switch point gap | 0.040 | inches | |
| Injection timing | Ignition timing (gasoline) | 19 | degrees BTC | 1800 rpm or slower |
| Injection timing | Ignition timing (gasoline) | 25 | degrees BTC | 3600 rpm or faster |
| Injection timing | Injection timing | 17 | degrees BTC | |
| Injection timing | Injection timing | 18 | degrees BTC | |
| Injection timing | Injection timing | 19 | degrees BTC | Later models after Spec P |
| Injection timing | Injection timing | 21 | degrees BTC | Before Spec P |
| Injection timing | PLB pump timing (DJA) | 17 | degrees BTC | |
| Other | Battery charging high rate | 6 to 8 | amps | |
| Other | Battery charging low rate | 2 to 3 | amps | |
| Other | Battery charging rate solid state combined | 5.26 | amps | |
| Other | Battery charging rate solid state high | 3.7 | amps | |
| Other | Battery charging rate solid state low | 1.56 | amps | |
| Other | Battery specific gravity when 75 percent charged | 1.290 to 1.225 | 75 percent charged | |
| Other | Bilge blower time delay | 5 | minutes | |
| Other | Cranking limiter limits cranking time | 45 to 90 | seconds | depending on ambient temperature |
| Other | Cranking limiter time | 45 to 90 | seconds | |
| Other | Emergency relay K14 operation time | 15 | seconds | |
| Other | Emergency time delay low oil shutdown | 45 | seconds | |
| Other | Maximum operation angle MCCK, MDJA, MDJE | 20 | degrees | any direction |
| Other | Maximum operation angle MDJC, MDJF | 30 | degrees | any direction |
| Other | Voltage adjust rheostat adjustment | plus or minus 5 | percent | |
| Pressure | Compression pressure | 300-350 | psi | cranking at about 300 rpm, prior to Spec P |
| Pressure | Compression pressure | 350-400 | psi | cranking at about 300 rpm, Spec P and later |
| Pressure | Delivery valve line pressure | 300-600 | psi | engine running |
| Pressure | Fuel pump pressure (MDJA) | 5-6 | psi (34.5-41.4 kPa) | at 1800 rpm |
| Pressure | Fuel pump pressure (MDJC, MDJE, MDJF) | 12-14 | psi (83-97 kPa) | at 1800 rpm |
| Pressure | Fuel transfer pump pressure | 12-14 | psi | operating at 1800 rpm |
| Pressure | Fuel transfer pump pressure | 5-6 | psi | operating at 1800 rpm |
| Pressure | Fuel transfer pump vacuum | 15-18 | inches (25.4-43.4 mm) | at sea level |
| Pressure | Injection line pressure | 1900 | psi (13,110 kPa) | |
| Pressure | Injection nozzle opening pressure | 1900-1950 | psi | new |
| Pressure | Injection nozzle opening pressure | 2100-2200 | psi | new Bryce/Kiki |
| Pressure | Low oil pressure switch close | 13-15 | psi | increasing pressure |
| Pressure | Nozzle opening pressure | 1900-1950 | psi (13,110-13,455 kPa) | |
| Pressure | Nozzle opening pressure (Kiki/Yanmar) | 2133-2204 | psi (14707-15196 kPa) | |
| Pressure | Nozzle opening pressure after several hundred hours | 1750 | psi (12,075 kPa) | |
| Pressure | Oil pressure | 25 | psi | normal at operating temperature |
| Pressure | Oil pressure minimum | 20 | psi | governed speed; inspect if below |
| Resistance | Brushless exciter field leads resistance | 12.2 + 10% | ohms | at 20 C (68 F.) |
| Resistance | Brushless exciter rotor lead pairs T1-T2, T2-T3, T1-T3 | 0.5 to 0.6 | ohm | at 68°F (20°C) |
| Resistance | Brushless exciter stator field leads | 11 to 13.4 | ohm | at 68°F (20°C) |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Recommended fluids
| Fluid | Grade | Standard | Ambient | Capacity | Notes |
|---|---|---|---|---|---|
| Coolant | 50/50 mixture antifreeze and clean water | increase antifreeze percentage in extremely low temperatures (-25F or lower) | |||
| Coolant | antifreeze | Replace annually in captive system | |||
| Engine oil | 5W-30 | API CC/SE | below 0°C | recommended for service in ambient temperatures of 32F and colder | |
| Engine oil | API CD/SE | Diesel engines; use CC/SE for first fill only (50 hours) | |||
| Engine oil | API SE or SE/CC | Gasoline engines | |||
| Engine oil | SAE 15W-40 or 20W-40 | API CD/SE or CC/SE | -10°C to 32°C | SAE 15W-40 or 20W-40 in 15F (-10C) through 90F (32C); multi-grade 5W-30 below 32F (0C) | |
| Fuel | ASTM 2-D or 1-D | minimum Cetane number 45 | use 1-D below 32F, long periods of light load or no load; low sulfur; pour point at least 10F below lowest expected | ||
| Fuel | nonleaded gasoline | Recommended for gasoline engines | |||
| Grease | graphite lubricant | Steel governor ball joints |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Adjust Carburetor adjustment
⚠ Do not force needles against seats.
- Open both needles 1 to 1-1/2 turns off seats.
- Apply full load; turn main fuel screw in until speed drops, then out to normal.
- Remove load; turn idle screw out until speed drops, then in to normal.
Adjust Governor Linkage (Diesel) adjustment
- Loosen locknuts on governor linkage, remove link at one ball joint.
- Position governor arm and fuel control arm fully forward.
- Adjust linkage so both ball joints fit without moving arms.
- Tighten locknuts.
- Release fuel solenoid plunger.
Adjust Valve Clearance (Diesel) adjustment
Tools: feeler gauge, socket wrench
- Turn flywheel to compression stroke for cylinder to adjust.
- Turn flywheel clockwise additional 10 to 45 degrees.
- Loosen locknut to increase clearance, tighten to reduce.
- Use feeler gauge to set proper gap.
- Adjust in firing order 1-2-4-3.
Adjust Valve Tappet (Gasoline) adjustment
Tools: feeler gauge, wrench
- Remove valve covers.
- Crank engine until intake valve opens and closes.
- Continue 1/4 turn until timing marks align.
- Turn adjusting screw to obtain correct clearance.
- Use flat feeler gauge between valve and valve rotator.
Battery Charge Rate Adjustment adjustment
⚠ Avoid overcharging.
Tools: DC ammeter
- Set slide tap on resistor R4 to about 2 amperes charging rate.
- For frequent starts, increase charge rate slightly until battery stays charged.
- Stop engine when readjusting to avoid shorts.
Fuel Injection Pump Timing (MDJA Method 2) adjustment
- Install pump with 0.006-inch (0.15 mm) shims.
- Loosen delivery valve holder to relieve spring pressure.
- Rotate flywheel to about 15 degrees before port closing point.
- Blow in pump inlet and rotate flywheel slowly clockwise until air stops.
- Measure distance from port closing point to PC mark.
- Select shims from table and install pump.
Set Breaker Points (MAJ) adjustment
- Remove flywheel and examine breaker points.
- Adjust gap to .022 inch (0.56 mm) at full separation.
- Loosen screw to shift point set, retighten securely.
Time Ignition (MCCK) adjustment
Tools: continuity light, thickness gauge
- Crank engine to fully open breaker points.
- Loosen locking screws and turn cam to adjust.
- Set point gap to .020 inch (0.51 mm).
- Shift breaker point box to align timing mark.
Time PLB Pump (DJA) adjustment
Tools: depth micrometer
- Install pump tappet in recess, position flywheel on port closing mark.
- Measure distance from mounting pad to tappet center.
- Subtract from 1.670-inch port closing dimension.
- Select correct shims and install pump.
Valve Clearance Adjustment (2-Cylinder) adjustment
Tools: feeler gauge
- Turn flywheel until cylinder to be adjusted is on compression stroke.
- Align TC mark with timing pointer.
- Turn flywheel clockwise an additional 10 to 45 degrees.
- Check clearance between rocker arm and valve with feeler gauge.
- Adjust with lock nut securing rocker arm to cylinder head.
Valve Clearance Adjustment (4-Cylinder) adjustment
Tools: feeler gauge
- Adjust valves in firing order 1-2-4-3.
- Adjust number 1 cylinder as for 2-cylinder engine.
- Turn flywheel 180 degrees clockwise for number 2 cylinder.
- Adjust number 2 cylinder.
- Turn flywheel 180 degrees clockwise for number 4 cylinder.
- Adjust number 4 cylinder.
- Turn flywheel 180 degrees clockwise for number 3 cylinder.
- Adjust number 3 cylinder.
Voltage Calibration Adjustment adjustment
Tools: AC voltmeter
- Set voltage adjust potentiometer halfway if present.
- With unit running at no load, turn R26 clockwise to increase voltage.
- Turn R26 counterclockwise to decrease voltage.
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Voltage reconnection
| Voltage | Phase | Connection | Leads | Notes |
|---|---|---|---|---|
| 12-lead broad range reconnectible alternator | 12 lead | User connects for required voltage and amperage | ||
| X1 to VR21-5 | X1 | for 50 Hertz | ||
| X1 to VR21-6 | X1 | for 60 Hertz | ||
| 110 | 1 | 518 | V1 | 50 hertz |
| 110/190 | 3 | 53C | V1 | 50 hertz |
| 110/220 | 1 | 518 | V1 | 50 hertz |
| 110/220 | 1 | 53C | V1 | 50 hertz |
| 110/220 | 3 | 518 | V1 | 50 hertz |
| 115 | 1 | 518 | V2 | 50 hertz |
| 115/200 | 3 | 53C | V2 | 50 hertz |
| 115/230 | 1 | 518 | V2 | 50 hertz |
| 115/230 | 1 | 53C | V2 | 50 hertz |
| 115/230 | 3 | 518 | V2 | 50 hertz |
| 120 | 1 | 2-wire | Reconnectible | |
| 120 | 1 | 3C | V1 | 60 hertz |
| 120 | 1 | 518 | V3 | 50 hertz |
| 120/208 | 3 | 3C | V1 | 60 hertz |
| 120/208 | 3 | 53C | V3 | 50 hertz |
| 120/240 | 1 | 3-wire | Standard connection for MCCK/MDJE/MDJC/MDJF | |
| 120/240 | 1 | 3C | V1 | 60 hertz. Connect X1 to VR21-5 for 50 hertz and X1 to VR21-6 for 60 hertz generators. Jumper W10 on VR21 must connect VR21-V4 to V1, V2, or V3 as listed. |
| 120/240 | 1 | 518 | V3 | 50 hertz |
| 120/240 | 1 | 53C | V3 | 50 hertz |
| 120/240 | 3 | 3C | V1 | 60 hertz |
| 127/220 | 3 | 3C | V2 | 60 hertz |
| 127/220 | 3 | 53C | V4 | 50 hertz |
| 139/240 | 3 | 3C | V4 | 60 hertz |
| 220/380 | 3 | 518 | V1 | 50 hertz |
| 230/400 | 3 | 518 | V2 | 50 hertz |
| 240 | 1 | 2-wire | Reconnectible | |
| 240/416 | 3 | 3C | V1 | 60 hertz; Figure 6 text partly garbled |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Common questions
What size generator is the Cummins/Onan MDJF?
The Cummins/Onan MDJF is rated 15 kW standby.
What kind of fuel does the Cummins/Onan MDJF run on?
The Cummins/Onan MDJF runs on diesel.
How much oil does the Cummins/Onan MDJF take?
The Cummins/Onan MDJF has an engine oil capacity of 6 liters (6.3 US quarts), per the manufacturer specification sheet.
What is the dry weight of the Cummins/Onan MDJF?
The Cummins/Onan MDJF has a dry weight of 865 kg (1906 lb).
What voltage does the Cummins/Onan MDJF produce?
The Cummins/Onan MDJF is offered in 120 V, 240 V, 1-phase-phase.
What battery does the Cummins/Onan MDJF use?
The Cummins/Onan MDJF uses 2 batteryies, 12 V each, group IH-two in series, per the manufacturer specification sheet.
Which alternator is fitted to the Cummins/Onan MDJF?
The Cummins/Onan MDJF uses a YD alternator. It has 4 poles.
What oil filter does the Cummins/Onan MDJF use?
The Cummins/Onan MDJF uses oil filter part number 122-0185.
Which fuel filter part number does the Cummins/Onan MDJF take?
The Cummins/Onan MDJF uses fuel filter part number 122-0325.
What air filter fits the Cummins/Onan MDJF?
The Cummins/Onan MDJF uses air filter part number 123-1871.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| 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. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan MDJF troubleshooting guide (9 entries) →
Repair guides
8- Bleeding Fuel System
- Compression Test
- Draining Cooling System
- Fuel Injection Pump Timing (MDJA Method 2)
- Valve Clearance Adjustment (2-Cylinder)
- Valve Clearance Adjustment (4-Cylinder)
- Water Pump #131-0152 Disassembly
- Water Pump #132-0110 Disassembly
Step-by-step procedures compiled from the Cummins/Onan service manual for this model.
Parts
88| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 12-0363 | Battery Cable | 1 | Cable | Amazon eBay |
| 122-0185 | Oil Filter | 1 | Oil filter | Amazon Amazon eBay $19.55 eBay NAPA $12.88 |
| 122-0188 | Gasket, Oil Adapter | 1 | Gasket | Amazon eBay |
| 122-0325 | Filter, Fuel - Primary | 1 | Fuel filter | Amazon eBay $75.00 NAPA $35.18 |
| 122-0326 | Filter, Fuel - Secondary | 1 | Fuel filter | Amazon eBay $65.00 NAPA $37.59 |
| 131-0152 | Pump, Water (sets without heat exchanger) | 1 | Pump | buy |
| 131-0160 | Impeller (water pump 131-0152) | 1 | Impeller | eBay KuduParts $234.00 FridayParts $244.13 |
| 131-0179 | Kit, Water Pump Repair | 1 | Pump | eBay |
| 132-0074 | Fresh water pump, with metal impeller | 1 | Pump | Amazon eBay |
| 132-0087 | Impeller (water pump 132-0074) | 1 | Impeller | buy |
| 132-0093 | Repair Kit, Water Pump (132-0074) | 1 | Pump | Amazon eBay |
| 132-0110 | Pump, Water | 1 | Pump | Amazon eBay |
| 132-0114 | Impeller | 1 | Impeller | Amazon eBay |
| 132-0115 | Pump, Water - Complete (units with heat exchanger) | 1 | Pump | Amazon eBay |
| 132-0116 | Repair Package, Water Pump (includes Parts Marked ‘) | 1 | Pump | eBay |
| 132-0146 | Water pump, neoprene impeller | 1 | Pump | buy |
| 132-0147 | Raw water pump, with neoprene impeller | 1 | Pump | buy |
| 147-0044 | Nozzle Only (component of Nozzle & Holder Assembly) | 4 | Injector | Amazon eBay $24.95 |
| 147-0136 | Nozzle & Holder Assembly | 1 | Injector | Amazon eBay |
| 147-0232 | Pump, Fuel - Injection (includes mounting gasket) | 1 | Pump | eBay |
| 149-0408 | Filter, Secondary Fuel (Includes Cartridge) | 1 | Fuel filter | Amazon eBay |
| 149-0428 | Cartridge, Secondary Fuel Filter | 1 | Fuel filter | Amazon eBay NAPA $20.57 |
| 149-1038 | Pump, Fuel Transfer | 1 | Pump | buy |
| 149-1046 | Repair Kit, Fuel Pump | 1 | Pump | Amazon eBay |
| 154-1057 | Gasket, Exhaust Manifold | 4 | Gasket | Amazon eBay |
| 16-0487 | Battery Cable | 2 | Cable | Amazon eBay |
| 168-0107 | Gasket Kit, Engine | 1 | Gasket | buy |
| 168-0204 | Gasket Kit MDJF | 1 | Gasket | Amazon |
| 191-0434 | Brush Set, Service (starter, 12 Volt) | 1 | Brush | Amazon eBay |
| 191-0774 | Brush Set, Service (starter, 24 Volt) | 1 | Brush | buy |
| 214-0059 | Brush, Collector Ring | 2 | Brush | buy |
| 309-0002 | High temperature cut-out switch | 1 | Sensor | Amazon eBay |
| 309-0054 | Thermostat | 1 | Thermostat | buy |
| 309-0130 | Thermostat | 1 | Thermostat | Amazon eBay $55.00 NAPA $35.33 |
| 309-0151 | High temperature cut-out switch | 1 | Sensor | Amazon eBay |
| 309-0156 | Cover, Thermostat Switch | 1 | Sensor | Amazon eBay $150.00 |
| 309-0178 | Switch, High Water Temperature Alarm - Optional | 1 | Sensor | Amazon eBay $350.00 |
| 309-0179 | Switch, High Water Temperature | 1 | Sensor | Amazon eBay |
| 309-0192 | High temperature cut-out switch | 1 | Sensor | Amazon eBay FridayParts $43.99 |
| 309-0238 | Thermostat - mounts inside expansion chamber | 1 | Thermostat | buy |
| 309-0252 | High temperature cut-out switch | 1 | Sensor | Amazon eBay |
| 309-0259 | SWITCH | 1 | Sensor | Amazon eBay $149.95 |
| 309-0289 | Thermostat | 1 | Thermostat | Amazon eBay |
| 309-0298 | Thermostat | 1 | Thermostat | Amazon eBay $32.95 |
| 333-0106 | Plug, Glow - 12 Volt (includes gasket) | 4 | Glow plug | Amazon eBay |
| 333-0107 | Glow Plug (24 Volt) - includes gasket | 1 | Glow plug | Amazon eBay |
| 333-0112 | Glow Plug (32 Volt) - includes gasket | 1 | Glow plug | Amazon eBay $134.95 |
| 416-0487 | Battery Cable | 2 | Cable | Amazon eBay |
| 502-0076 | Gasket, Water Pump Mounting | 1 | Gasket | buy |
| 503-0217 | Hose, Rubber (3/4 in I.D. x 56 in) - heat exchanger hoses | 1 | Hose | buy |
| 511-0067 | Belt, Centrifugal Water Pump | 1 | Belt | Amazon eBay NAPA $4.76 |
| 511-0068 | Water Pump Belt Keel Cooling Pump | 1 | Belt | Amazon eBay |
| 123-1061 | Damper, Breather Pulsation | 1 | Service part / kit | Amazon eBay |
| 123-1871 | Breather Filter Element | 1 | Service part / kit | Amazon eBay |
| 130-0553 | Pressure cap, 4 psi (28 kPa) | 1 | Service part / kit | buy |
| 130-0589 | Pressure cap, 14 psi (97 kPa) | 1 | Service part / kit | buy |
| 130-0626 | Pencil, Zinc (Included in Heat Exchanger) | 1 | Service part / kit | Amazon eBay |
| 130-0661 | Pressure cap, 7 psi (48 kPa) | 1 | Service part / kit | buy |
| 130-0824 | Pressure cap, 15 psi (103.5 kPa) | 1 | Service part / kit | buy |
| 130-0915 | Heat exchanger kit (J-Series) | Service part / kit | buy | |
| 130-1340 | Zinc Pencil | 1 | Service part / kit | Amazon eBay NAPA $97.32 |
| 132-0111 | Repair Kit | 1 | Service part / kit | Amazon eBay |
| 147-0147 | Tappet | 1 | Service part / kit | Amazon eBay |
| 147-0148 | Injection pump timing button, code 2 or B, size 0.116 | 1 | Service part / kit | Amazon eBay |
| 147-0149 | Injection pump timing button, code 3 or C, size 0.113 | 1 | Service part / kit | Amazon eBay |
| 147-0150 | Tappet | 1 | Service part / kit | Amazon eBay |
| 147-0151 | Tappet | 1 | Service part / kit | Amazon eBay |
| 147-0152 | Injection pump timing button, code 6 or F, size 0.101 | 1 | Service part / kit | Amazon eBay |
| 147-0153 | Injection pump timing button, code 7 or H, size 0.098 | 1 | Service part / kit | Amazon eBay |
| 147-0154 | Injection pump timing button, code 8 or J, size 0.095 | 1 | Service part / kit | Amazon eBay |
| 147-0155 | Tappet | 1 | Service part / kit | Amazon eBay |
| 147-0156 | Tappet | 1 | Service part / kit | Amazon eBay |
| 147-0161 | Tappet | 1 | Service part / kit | Amazon eBay |
| 147-0186 | Injection pump timing button, code 16 or S, size 0.134 | 1 | Service part / kit | Amazon eBay |
| 147-0187 | Injection pump timing button, code 15 or R, size 0.131 | 1 | Service part / kit | Amazon eBay |
| 147-0188 | Tappet | 1 | Service part / kit | Amazon eBay |
| 147-0189 | Injection pump timing button, code 13 or N, size 0.125 | 1 | Service part / kit | Amazon eBay |
| 147-0190 | Injection pump timing button, code 12 or M, size 0.122 | 1 | Service part / kit | Amazon eBay |
| 149-0463 | Valve, Check | 1 | Service part / kit | Amazon eBay |
| 155-1004 | Muffler, Aqualift Marine | 1 | Service part / kit | buy |
| 304-0500 | Resistor, Tapped (Adjustable) | 1 | Service part / kit | eBay $109.95 |
| 304-0534 | Resistor, Tapped Adjustable | 1 | Service part / kit | buy |
| 309-0169 | 1 Begin Spec G 25 26 | 1 | Service part / kit | Amazon eBay |
| 505-0057 | Plug, Square Head (1/8') | 1 | Service part / kit | Amazon eBay |
| 522-0242 | Overhaul Kit, Engine - units without heat exchanger | 1 | Service part / kit | buy |
| 522-0243 | Overhaul Kit, Engine - units with heat exchanger | 1 | Service part / kit | buy |
| 522-0252 | Overhaul Kit, Engine - units with heat exchanger | 1 | Service part / kit | buy |
| 522-0253 | Overhaul Kit, Engine - units without heat exchanger | 1 | Service part / kit | buy |
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.
Available documents
Parts manual — 932-0109B Onan Engine & Genset Short Block Index (10-1998) (Cummins/Onan)Parts manual — DK-Kohler (Cummins/Onan)Parts manual — F-1229D Onan Marine Service Parts & Maintenance Schedule Card (09-2002) (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 — 932-0405 Onan Marine Genset MCCK MDJA MDJC MDJE MDJF Training Manual (07-1979) (Cummins/Onan)Service manual — 968-0345 Onan MDJF Operators and Parts Manual (6-1973) (Cummins/Onan)Service manual — 974-0750 Onan MDJA to MDJF Marine Diesel Engine Service Manual 12-1985 (Cummins/Onan)
This page was generated from the 8 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.