Service parts for the 3.0MDJA
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 |
|---|---|
| Standby power | 3 kW |
| Oil capacity | 2.8 L |
| Coolant capacity | 4.3 L |
Maintenance & consumables
for the Cummins/Onan MDJA| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Filter, Breather Tube | 123-0954 | Amazon eBay | ||
| Fuel filter | Screen, Fuel Transfer Pump | 149-0408 | Amazon eBay | ||
| Fuel filter | Secondary fuel filter | — | 3000 hr | ||
| Oil filter | Cup, Oil Pump Intake Filter | 120-0551 | Amazon eBay | ||
| Battery | Check condition/specific gravity at least every two weeks; recharge if specific gravity below 1.265 | — | |||
| Coolant | Optional heat-exchanger (captive water) cooling system capacity; 50/50 ethylene glycol/water mix recommended | — | |||
| Oil | Crankcase oil, API CD/SE (CC/SE for first 50-hour fill only); use SAE grade per ambient-temperature chart | — | 100 hr |
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 | |
| 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 | Bilge blower time delay | 5 | minutes | |
| 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 |
| 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 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) |
| Resistance | Charge resistor R3 | 1.72 | ohm | |
| Resistance | Charge winding | 0.11 | ohm | |
| Resistance | Control-O-Matic relay A1K1 A-B | 650 | ohm | |
| Resistance | Control-O-Matic relay A1K1 coil A-C | 34 | ohm | |
| Resistance | Reactor leads 1-2 and 3-4 | 0.4 | ohm |
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 | ||
| 120 | 1 | 2-wire | Reconnectible | |
| 120/240 | 1 | 3-wire | Standard connection for MCCK/MDJE/MDJC/MDJF | |
| 240 | 1 | 2-wire | Reconnectible |
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 is the power rating of the Cummins/Onan 3.0MDJA?
The Cummins/Onan 3.0MDJA is rated 3 kW standby.
Which engine powers the Cummins/Onan 3.0MDJA?
The Cummins/Onan 3.0MDJA is powered by the Cummins/Onan MDJA engine.
Is the Cummins/Onan 3.0MDJA diesel or gas?
The Cummins/Onan 3.0MDJA runs on Diesel.
What is the oil capacity of the Cummins/Onan 3.0MDJA?
The Cummins/Onan MDJA engine in the Cummins/Onan 3.0MDJA has an oil capacity of 2.8 liters.
How much coolant does the Cummins/Onan 3.0MDJA hold?
The Cummins/Onan 3.0MDJA cooling system holds 4.3 liters (1.1 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
What oil filter does the Cummins/Onan 3.0MDJA use?
The Cummins/Onan 3.0MDJA uses oil filter part number 120-0551.
What fuel filter does the Cummins/Onan 3.0MDJA use?
The Cummins/Onan 3.0MDJA uses fuel filter part number 149-0408.
What air filter does the Cummins/Onan 3.0MDJA use?
The Cummins/Onan 3.0MDJA uses air filter part number 123-0954.
Troubleshooting
2Fault codes
| Code | Meaning |
|---|---|
| e008 | No specific name provided for e008 |
| 10 | Overload |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Repair guides
7- Bleeding Fuel System
- 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
250| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 101-0386 | Gasket and Shim Kit, Rear Bearing Plate - Includes Bearing Plate Mounting Washers | 1 | Gasket | Amazon eBay |
| 102-0459 | Gasket, Base | 1 | Gasket | Amazon eBay |
| 110-0419 | Gasket, Shield to Head (Copper) | 4 | Gasket | Amazon eBay |
| 115-0165 | Tappet, Injection Pump | 1 | Fuel pump | Amazon eBay |
| 119-0086 | Seal, Crankshaft - Rear | 1 | Seal | Amazon eBay |
| 120-0533 | Oil Pump Mounting (5/16) | 1 | Pump | Amazon eBay |
| 120-0547 | Pump Assembly, Oil | 1 | Pump | Amazon eBay $295.00 |
| 120-0551 | Cup Assembly, Oil Pump Intake | 1 | Pump | Amazon eBay |
| 120-0562 | 1 Gasoline Sets - Spec A through N | 1 | Hose | Amazon eBay |
| 120-0572 | Tube, Crankcase Oil | 1 | Hose | Amazon eBay |
| 120-0580 | Gasket Kit, Oil Pump | 1 | Gasket | Amazon eBay |
| 120-0622 | Line, Adapter to Cylinder Head | 1 | Hose | Amazon eBay |
| 122-0182 | Adapter, Oil Filter | 1 | Oil filter | Amazon eBay |
| 122-0185 | Filter, Oil | 1 | Oil filter | Amazon Amazon eBay $19.55 eBay $14.00 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 |
| 123-0191 | Gasket, Oil Fill Cap | 1 | Gasket | Amazon eBay |
| 123-0567 | Gasket, Cap | 1 | Gasket | Amazon eBay |
| 123-0716 | Cap and Valve Assembly, Breather | 1 | Gasket | Amazon eBay |
| 123-0724 | Tube, Oil Fill | 1 | Hose | Amazon eBay |
| 123-0769 | Hose, Breather | 1 | Hose | Amazon eBay |
| 123-1201 | Retainer, Breather screen | 1 | Air filter | Amazon eBay |
| 123-1202 | Screen, Breather | 1 | Air filter | Amazon eBay |
| 123-1283 | Filter, Breather Tube | 1 | Air filter | Amazon eBay |
| 129-0515 | Oil Filter Adapter Mounting (5/16") | 1 | Oil filter | Amazon eBay |
| 131-0142 | Plate, Water Pump Drive Shaft Bearing | 1 | Pump | Amazon eBay |
| 131-0152 | Pump, Water | 1 | Pump | eBay |
| 131-0257 | Pump, Water (Sea Water) | 1 | Pump | Amazon eBay |
| 132-0009 | Body, Pump | 1 | Pump | Amazon eBay |
| 132-0037 | Pump, Water | 1 | Pump | Amazon eBay |
| 132-0059 | Kit, Water Pump Service | 1 | Pump | Amazon eBay |
| 132-0060 | Shaft, Water Pump | 1 | Pump | Amazon eBay $45.78 |
| 132-0063 | Cover, Water Pump | 1 | Pump | Amazon eBay |
| 132-0064 | Impeller | 1 | Impeller | Amazon eBay $40.00 |
| 132-0074 | Fresh water pump, with metal impeller | 1 | Pump | Amazon eBay |
| 132-0091 | Face, Wear | 1 | Impeller | Amazon eBay |
| 132-0092 | Seat, Seal | 1 | Seal | Amazon eBay |
| 132-0110 | Pump, Water | 1 | Pump | Amazon eBay |
| 132-0112 | Gasket, Cover | 1 | Gasket | Amazon eBay |
| 132-0114 | Impeller | 1 | Impeller | Amazon eBay |
| 132-0115 | Pump, Water - Complete | 1 | Pump | Amazon eBay |
| 132-0138 | Seal Assembly | 1 | Seal | Amazon eBay |
| 132-0146 | Water pump, neoprene impeller | 1 | Pump | eBay |
| 132-0147 | Fresh water pump | 1 | Pump | eBay |
| 132-0152 | Kit, Water Pump Service - Begin Spec E | 1 | Pump | Amazon eBay |
| 140-0504 | Adapter, Air Cleaner | 1 | Air filter | Amazon eBay |
| 140-0516 | Adapter, Air Cleaner | 1 | Air filter | Amazon eBay |
| 140-0517 | Adapter, Air Cleaner | 1 | Air filter | Amazon eBay |
| 140-0584 | Gasket, Air Cleaner | 1 | Gasket | Amazon eBay |
| 140-0594 | Gasket, Air Cleaner | 1 | Air filter | Amazon eBay |
| 140-0606 | Element, Air Cleaner | 1 | Air filter | Amazon eBay |
| 140-0607 | Element, Air Cleaner - Foam Type | 1 | Air filter | Amazon eBay |
| 140-0705 | Element and Retainer, Air Cleaner | 1 | Air filter | Amazon eBay |
| 140-0706 | Gasket, Manifold Heater - Insulated | 1 | Gasket | Amazon eBay |
| 140-1704 | Gasket, Manifold Heater - Insulated | 1 | Gasket | Amazon eBay |
| 147-0043 | Gasket, Nozzle Heat Shield (Asbestos) | 4 | Gasket | Amazon eBay |
| 147-0044 | Shield, Nozzle Heat (Steel) | 4 | Injector | Amazon eBay $24.95 |
| 147-0134 | Nozzle Only | 4 | Injector | Amazon eBay $87.50 |
| 147-0136 | Nozzle & Holder Assembly | 4 | Injector | Amazon eBay |
| 147-0141 | Flange, Injection Nozzle Hold-down | 1 | Injector | Amazon eBay |
| 147-0167 | Pump, Injection | 1 | Pump | Amazon eBay |
| 147-0172 | Line, Injection Pump to Nozzle | 1 | Hose | Amazon eBay |
| 149-0408 | Filter, Secondary Fuel (Includes Cartridge) | 1 | Fuel filter | Amazon eBay |
| 149-0428 | Cartridge, Secondary Fuel Filter | 1 | Fuel filter | Amazon eBay $89.10 NAPA $20.57 |
| 149-0455 | Gasket, Secondary Filter Cartridge to Head - Specs A Through R | 1 | Gasket | Amazon eBay |
| 149-0456 | Gasket, Secondary Filter Bowl to Cover | 1 | Gasket | Amazon eBay |
| 149-0463 | Valve, Check | 1 | Fuel filter | Amazon eBay |
| 149-0493 | Gasket, Secondary Filter Cartridge to Retainer - Specs A Through R | 1 | Gasket | Amazon eBay |
| 149-0517 | Gasket, Fuel Pump Bowl | 1 | Gasket | Amazon eBay |
| 149-0792 | Gasket, Fuel Transfer Pump Mounting | 1 | Gasket | Amazon eBay |
| 149-0947 | Washer, Flange - Pump Mounting | 1 | Pump | Amazon eBay |
| 149-0958 | Gasket, Pump Mounting | 1 | Gasket | Amazon eBay |
| 149-1307 | Strainer, Fuel Pump Mounting | 2 | Fuel filter | Amazon eBay |
| 149-1339 | Pump, Fuel Transfer (Includes Mounting Gasket) | 1 | Pump | Amazon eBay |
| 149-1964 | Bowl, Fuel Pump - Replacement Kit for sets with long (2-3/8") fuel pump bowl | 1 | Fuel pump | Amazon eBay |
| 154-0894 | Tube, Water Injection - Exhaust | 1 | Hose | Amazon eBay |
| 154-1057 | Gasket, Exhaust Manifold | 4 | Gasket | Amazon eBay |
| 160-0721 | Gasket, Breaker Plate | 1 | Gasket | Amazon eBay |
| 168-0195 | Complete engine gasket kit | 1 | Gasket | Amazon eBay |
| 191-0331 | Gear & Shaft Assembly, Water Pump Drive | 1 | Pump | Amazon eBay |
| 191-0552 | Gear & Shaft Assembly, Water Pump Drive | 1 | Pump | Amazon eBay |
| 193-0006 | Gauge, Oil Pressure | 1 | Sensor | Amazon eBay $94.95 |
| 241-0281 | Gasket, Air Cleaner Adapter to Engine | 1 | Gasket | Amazon eBay |
| 305-0019 | Gasket Kit #168-0091 | 6 | Gasket | Amazon eBay |
| 307-0736 | Gasket, Solenoid Mounting | 1 | Gasket | Amazon eBay |
| 309-0002 | Switch Assembly - High Temperature Cut-Off | 1 | Sensor | Amazon eBay |
| 309-0054 | Thermostat | 1 | Thermostat | eBay |
| 309-0130 | Thermostat | 1 | Thermostat | Amazon eBay $55.00 NAPA $35.33 |
| 309-0144 | Cover, Thermostat Outlet | 1 | Thermostat | Amazon eBay FridayParts $374.61 |
| 309-0145 | Gasket, Thermostat Cover | 1 | Gasket | Amazon eBay |
| 309-0151 | High temperature cut-out switch | 1 | Sensor | Amazon eBay |
| 309-0154 | Cover, Thermostat Switch | 2 | Thermostat | Amazon eBay |
| 309-0156 | Switch, High Temperature | 1 | Sensor | Amazon eBay $150.00 |
| 309-0161 | Cover, Thermostat Outlet | 1 | Thermostat | Amazon eBay |
| 309-0178 | Switch, High Water Temperature Top Mounted On Water Outlet Housing | 1 | Sensor | Amazon eBay $350.00 |
| 309-0179 | Switch, High Water Temperature (Standard Part) Side Mounted On Water Outlet Housing | 1 | Sensor | Amazon eBay |
| 309-0192 | High temperature cut-out switch | 1 | Sensor | Amazon eBay FridayParts $43.99 |
| 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 |
| 309-0420 | Switch, Cut-Off - High Exhaust Temperature | 1 | Sensor | Amazon eBay |
| 333-0106 | Plug, Glow - 12 Volt (includes gasket) | 4 | Glow plug | Amazon eBay |
| 336-1313 | Lead, Glow Plug to Air Heater - Round Type Terminal | 1 | Glow plug | Amazon eBay |
| 336-1505 | Lead, Glow Plug to Air Heater - Blade Type Terminal | 1 | Glow plug | Amazon eBay |
| 501-0032 | Line, Pump to Secondary Filter | 1 | Hose | Amazon eBay |
| 501-0103 | Line, Fuel Secondary Filter to Injection Pump | 1 | Hose | Amazon eBay |
| 501-0242 | Elbow, Injection Pump Inlet | 1 | Fuel pump | Amazon eBay |
| 502-0002 | Elpow, Street - Fuel Pump 2 | 1 | Fuel pump | Amazon eBay |
| 502-0020 | Elbow, Street - Fuel Pump Inlet | 1 | Fuel pump | Amazon eBay |
| 502-0065 | ELBOW, NOZZLE (Fuel Return Line) Inverted 45 Degrees (#1 and 4 Cylinders) | 2 | Gasket | Amazon eBay |
| 502-0103 | Gasket, Exhaust Manifold to Head | 1 | Gasket | Amazon eBay |
| 502-0237 | Elbow, Brass - Water Hose Adapter | 2 | Hose | Amazon eBay |
| 503-0365 | Clamp, Hose | 1 | Hose | Amazon eBay |
| 503-0446 | Clamp, Hose | 2 | Hose | Amazon eBay |
| 503-0465 | Clamp, Hose | 4 | Hose | Amazon eBay $23.99 |
| 503-0479 | Hose, Flexible - Breather | 1 | Hose | Amazon eBay |
| 503-0560 | Hose, Breather | 1 | Hose | Amazon eBay |
| 503-0575 | Elbow, Exhaust Hose | 1 | Hose | Amazon eBay |
| 503-0586 | Hose, Rubber (1/2 x 36") - Water Outlet & Inlet | 1 | Hose | Amazon eBay |
| 505-0180 | Plug, Pipe (1-1/4"), Air Cleaner Adapter and Intake Manifold | 1 | Air filter | Amazon eBay |
| 509-0018 | Ring, "O" - Spark Plug Cables | 1 | Seal | Amazon eBay |
| 509-0101 | Seal, O Ring - Injection Pump to Crankcase | 1 | Seal | Amazon eBay |
| 509-0117 | Seal, "O" Ring - Breather Tube | 1 | Seal | Amazon eBay |
| 511-0067 | Belt, Centrifugal Water Pump | 1 | Belt | Amazon eBay NAPA $4.76 |
| 520-0143 | Switch, High Temperature Cut-off | 1 | Sensor | Amazon eBay |
| 520-0621 | Stud, Air Cleaner | 2 | Air filter | Amazon eBay |
| 870-0170 | Nut, Knurled Brass, Air Cleaner | 2 | Air filter | Amazon eBay |
| REC122B326 | Fuel filter | 1 | Fuel filter | Amazon eBay $40.50 |
| REC1491758 | Oil filter | 1 | Oil filter | Amazon eBay $30.72 |
| 101-0337 | Plate, Bearing (Less Bearing and Pin) | 1 | Service part / kit | Amazon eBay $175.00 |
| 101-0359 | Bearing, Main (Precision) - Front or Rear - Standard | 2 | Service part / kit | Amazon eBay |
| 101-0359-02 | Bearing, Precision Crankshaft - .002 Undersize | 2 | Service part / kit | Amazon eBay |
| 101-0359-10 | Bearing, Precision Crankshaft - .010 Undersize | 2 | Service part / kit | Amazon eBay |
| 101-0359-20 | Bearing, Precision Crankshaft - .020 Undersize | 2 | Service part / kit | Amazon eBay $10.44 |
| 101-0359-30 | Bearing, Precision Crankshaft - .030 Undersize | 2 | Service part / kit | Amazon eBay |
| 101-0363 | 1 "Bearing, Precision Cam Front (Standard Only) 8 | 1 | Service part / kit | Amazon eBay NAPA $41.82 |
| 101-0365 | 1 "Bearing, Precision Cam Rear (Standard Only) 8A | 1 | Service part / kit | Amazon eBay |
| 102-0488 | Base, Oil | 1 | Service part / kit | Amazon eBay |
| 102-0541 | Base, Oil | 1 | Service part / kit | Amazon eBay |
| 104-0091 | Washer, Flat (Special) | 4 | Service part / kit | Amazon eBay |
| 104-0416 | Flywheel | 1 | Service part / kit | Amazon eBay |
| 104-0420 | 2 "Washer, Crankshaft Thrust | 2 | Service part / kit | Amazon eBay |
| 104-0447 | Flywheel | 1 | Service part / kit | Amazon eBay |
| 104-0467 | Guard, Flywheel | 1 | Service part / kit | Amazon eBay |
| 104-0564 | Cover, Flywheel Guard | 1 | Service part / kit | Amazon eBay |
| 104-0594 | Cover, Flywheel Guard | 1 | Service part / kit | Amazon eBay |
| 104-1288 | Crankshaft Kit | 1 | Service part / kit | Amazon eBay |
| 105-0205 | 1 Washer, Thrust Gear 5 | 1 | Service part / kit | Amazon eBay |
| 105-0218 | 1 Begin Spec B 12 | 1 | Service part / kit | Amazon eBay |
| 105-0248 | Camshaft - Spec A through Q | 1 | Service part / kit | Amazon eBay |
| 105-0299 | Camshaft - Begin Spec R | 1 | Service part / kit | Amazon eBay |
| 105-0465 | Gear Assembly, Camshaft | 1 | Service part / kit | Amazon eBay |
| 110-0445 | Nut, Hex | 4 | Service part / kit | Amazon eBay |
| 110-1357 | Block Assembly, Cylinder | 1 | Service part / kit | Amazon eBay |
| 112-0173 | Piston & Pin, Includes Pin Retaining Rings - Standard - Spec A through Q | 1 | Service part / kit | Amazon eBay |
| 112-0173-10 | Piston and Pin - .010 Oversize | 1 | Service part / kit | Amazon eBay |
| 112-0173-20 | Piston and Pin - .020 Oversize | 1 | Service part / kit | Amazon eBay |
| 112-0173-30 | Piston and Pin - .030 Oversize | 1 | Service part / kit | Amazon eBay |
| 112-0173-40 | Piston and Pin - .040 Oversize | 1 | Service part / kit | Amazon eBay |
| 112-0175 | Piston & pin (standard) | 1 | Service part / kit | Amazon eBay |
| 112-0175-05 | Piston and Pin - .005 Oversize | 1 | Service part / kit | Amazon eBay |
| 112-0175-10 | Piston & pin - .010 oversize | 1 | Service part / kit | Amazon eBay $82.50 |
| 112-0175-20 | Piston & pin - .020 oversize | 1 | Service part / kit | Amazon eBay |
| 113-0130-05 | Piston - .005 Oversize | 1 | Service part / kit | Amazon eBay |
| 113-0130-10 | Piston - .010 Oversize | 1 | Service part / kit | Amazon eBay |
| 113-0130-20 | Piston - .020 Oversize | 1 | Service part / kit | Amazon eBay |
| 113-0130-30 | Piston - .030 Oversize | 1 | Service part / kit | Amazon eBay |
| 113-0130-40 | Piston - .040 Oversize | 1 | Service part / kit | Amazon eBay |
| 113-0138 | Piston - Standard | 1 | Service part / kit | Amazon eBay |
| 114-0023 | Screw, Cap - Manifold Heater Mounting (Special) | 1 | Service part / kit | Amazon eBay |
| 114-0164 | BEARING HALF, CONNECTING ROD | 2 | Service part / kit | Amazon eBay |
| 114-0164-02 | Wearing Half - Connecting Rod - .002 Undersize | 2 | Service part / kit | Amazon eBay |
| 114-0164-10 | Wearing Half - Connecting Rod - .010 Undersize | 2 | Service part / kit | Amazon eBay |
| 114-0164-20 | Wearing Half - Connecting Rod - .020 Undersize | 2 | Service part / kit | Amazon eBay |
| 114-0164-30 | Wearing Half - Connecting Rod - .030 Undersize | 2 | Service part / kit | Amazon eBay |
| 114-0170 | Bushing, Piston Pin - Connecting Rod | 2 | Service part / kit | Amazon eBay |
| 115-0132 | 8 Spec A through N | 2 | Service part / kit | Amazon eBay |
| 115-0195 | Tappet, Valve | 2 | Service part / kit | Amazon eBay |
| 120-0598 | Screw, Cap - Hex Head | 1 | Service part / kit | Amazon eBay |
| 122-0101 | Seat | 1 | Service part / kit | Amazon eBay |
| 123-0051 | Clamp, Breather | 1 | Service part / kit | Amazon eBay |
| 123-0865 | 1 Baffle, Breather Tube- Spec A through S BASE, OIL | 1 | Service part / kit | Amazon eBay $23.69 |
| 123-0954 | Cap and Valve, Breather | 1 | Service part / kit | Amazon eBay |
| 123-1084 | Cap and Indicator | 1 | Service part / kit | Amazon eBay |
| 123-1153 | Cup & Holder, Baffle | 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 | eBay |
| 130-0589 | Pressure cap, 14 psi (97 kPa) | 1 | Service part / kit | eBay |
| 130-0661 | Cap, Heat Exchanger - 7PSI | 1 | Service part / kit | eBay |
| 130-0824 | Pressure cap, 15 psi (103.5 kPa) | 1 | Service part / kit | eBay |
| 130-1340 | Zinc Pencil | 1 | Service part / kit | Amazon eBay NAPA $97.32 |
| 132-0061 | Plate Assembly, Cam & Wear | 1 | Service part / kit | Amazon eBay |
| 132-0062 | Screw, Cap - Hex Head | 1 | Service part / kit | Amazon eBay |
| 132-0065 | Seat | 1 | Service part / kit | Amazon eBay |
| 132-0066 | Ring, Wear | 1 | Service part / kit | Amazon eBay |
| 132-0068 | Plug, Pipe - See Over | 1 | Service part / kit | Amazon eBay |
| 132-0132 | Nut, Hex | 1 | Service part / kit | Amazon eBay |
| 132-0136 | Washer, Lock - Spring | 1 | Service part / kit | Amazon eBay |
| 132-0139 | Plug, Pipe | 1 | Service part / kit | Amazon eBay |
| 132-0140 | Screw, Cap - Hex Head | 1 | Service part / kit | Amazon eBay |
| 132-0141 | Ring, Wear | 1 | Service part / kit | Amazon eBay |
| 132-0142 | Ring, Mounting & Shaft Assembly | 1 | Service part / kit | Amazon eBay |
| 140-0602 | Washer, Rubber | 2 | Service part / kit | Amazon eBay |
| 140-1703 | Plate, Manifold Heater Mounting | 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 |
| 149-0191 | Elbow, Secondary Filter to Line | 1 | Service part / kit | Amazon eBay |
| 149-1042 | 5@3-oo&5 | 1 | Service part / kit | Amazon eBay |
| 150-0075 | Pin, Camshaft Center | 1 | Service part / kit | Amazon eBay |
| 150-0078 | Ring, Camshaft Center Pin | 1 | Service part / kit | Amazon eBay |
| 150-0773 | 1 Plate, Governor Flyball 6 FLYBALL, GOVERNOR | 1 | Service part / kit | Amazon eBay |
| 150-0775 | Cup, Governor | 1 | Service part / kit | Amazon eBay |
| 150-0810 | Bracket Assembly | 1 | Service part / kit | Amazon eBay |
| 150-0821 | Constant speed governor | 1 | Service part / kit | Amazon eBay |
| 150-0822 | Stud, Adjusting - Spec A through Q | 1 | Service part / kit | Amazon eBay |
| 150-0823 | Cover, Governor Bracket | 1 | Service part / kit | Amazon eBay |
| 150-0883 | Link, Governor | 1 | Service part / kit | Amazon eBay |
| 150-0939 | Joint, Ball | 2 | Service part / kit | Amazon eBay |
| 150-0974 | Joint, Ball | 2 | Service part / kit | Amazon eBay |
| 150-1082 | Stud, Adjusting - Begin Spec R | 1 | Service part / kit | Amazon eBay |
| 150-1084 | Spring, Governor - Begin Spec R | 1 | Service part / kit | Amazon eBay $38.95 |
| 150-1103 | Bracket Assembly | 1 | Service part / kit | Amazon eBay |
| 150-1201 | Link, Governor | 1 | Service part / kit | Amazon eBay |
| 154-0712 | Heater, Manifold | 1 | Service part / kit | Amazon eBay |
| 154-0725 | Manifold, Exhaust | 1 | Service part / kit | Amazon eBay |
| 154-0971 | Manifold, Exhaust | 2 | Service part / kit | Amazon eBay |
| 154-1665 | Tab, Lock - Exhaust Manifold | 1 | Service part / kit | Amazon eBay |
| 155-0950 | Siphon Break Kit | 1 | Service part / kit | Amazon eBay $85.00 |
| 155-1058 | Tee, Reducing - Exhaust | 1 | Service part / kit | Amazon eBay |
| 160-0323 | Plunger, Solenoid (Keys 1,2,4) | 1 | Service part / kit | Amazon eBay |
| 160-0379 | Diaphragm, Breaker Plunger (Key 3) | 1 | Service part / kit | Amazon eBay FridayParts $356.14 |
| 160-0382 | Diaphragm, Breaker Plunger (Keys 1,2,4) | 1 | Service part / kit | Amazon eBay $9.95 |
| 160-0720 | 160-0720 160-0721 160-07~’v | 1 | Service part / kit | Amazon eBay |
| 160-0774 | 1 Plunger, Thrust : 8540014 2 Gail Mounting | 1 | Service part / kit | Amazon eBay |
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 — 968-0223 Onan MDJA Parts Manual (6-1981) (Cummins/Onan)Service manual — 932-0405 Onan Marine Genset MCCK MDJA MDJC MDJE MDJF Training Manual (07-1979) (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 3 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.