Service parts for the MCE 6.5
Grouped by system, with how many of each the parts manual calls for.
Oil system
1 requiredBelts
1 requiredIgnition
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Fuel | Unleaded, 88 Octane |
|---|---|
| Frequency | 60.0 Hz |
| Standby power | 6 kW |
| Standby kVA | 6 |
| Oil capacity | 2.8 L |
| Voltage options | 120 V, 120/240 V |
| Phase | 1 |
| Power factor | 1.0 |
| Battery cranking | 360 CCA |
| Battery voltage | 12 V |
| Battery quantity | 1 |
| Coolant capacity | 2.8 L |
Engine
| Oil capacity | 2.8 L |
|---|---|
| Coolant capacity | 2.8 L |
| Aspiration | Naturally aspirated |
| Rated speed | 1800 rpm |
Maintenance & consumables
for the Cummins/Onan MCE| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | ||||
| Fuel filter | — | 35 hr | |||
| Oil filter | 518-0347 | Amazon eBay | |||
| Battery | cleaning, checking specific gravity, checking electrolyte level | — | 100 hr | ||
| Belt | M-1823 | Amazon eBay | |||
| Coolant | 50/50 ethylene glycol antifreeze and clean water | 2.8 L | — | 100 hr | |
| Oil | API SF/CD, SAE viscosity grade per ambient temperature | 2.8 L | — | 250 hr | |
| Spark plug | ES-I374 | Amazon eBay |
Common questions
What size generator is the Cummins/Onan MCE 6.5?
The Cummins/Onan MCE 6.5 is rated 6 kW standby (6.5 kVA).
What engine is in the Cummins/Onan MCE 6.5?
The Cummins/Onan MCE 6.5 is powered by the Cummins/Onan MCE engine.
What fuel type does the Cummins/Onan MCE 6.5 take?
The Cummins/Onan MCE 6.5 runs on Unleaded, 88 Octane.
What is the oil capacity of the Cummins/Onan MCE 6.5?
The Cummins/Onan MCE engine in the Cummins/Onan MCE 6.5 has an oil capacity of 2.8 liters.
What oil filter fits the Cummins/Onan MCE 6.5?
The Cummins/Onan MCE 6.5 uses oil filter part number 518-0347.
Troubleshooting
4Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Engine Does Not Crank | 1. Control fuse F11 open. 2. Insufficient voltage for cranking due to: A. Terminal connection loose or corroded. 6. Battery dead or not charged 3. If engine cranks at set but not at the remote control panel, cause may be: A. Open circuit in remote B. Fault with remote start control switch. 4. If engine cranks at remote control panel but not at set, cause may be: A. Open circuit in wiring B. Fault in S11 switch between S11 switch and engine monitor PCB (A1 1). 5. There is voltage at terminal S, but not at S1 of starter solenoid K11 during START. 6. There is voltage at the starter motor terminal during START. 7. There is no voltage at terminal S of starter solenoid K11 during START. | 1. Replace fuse (10 ampere) A. Clean and tighten connections at battery, K11 start solenoid, and the starter motor. B. Check condition of battery and recharge or replace. 3. A. Check for continuity and correct if circuit is open. B. Replace remote start switch. 4. A. Check for continuity and correct if circuit is open. B. Replace S11 switch. 5. Check voltage at terminal 1 of solenoid K11. If it is not “0”, fix lead to ground. If voltage at terminal 1 of solenoid K11 is “0, replace faulty solenoid K11. 6. Service or replace defective starter. 7. Fix open circuit between K11 and engine monitor PCB (A1 1). If OK, replace defective engine monitor board (A1 1). |
| Engine Cranks But Does Not Start | 1. Faulty ignition due to defective spark plugs, plug wires, coil, or electronic module. 2. Faulty fuel system due to sticking choke, faulty fuel pump, plugged filter, or carburetor misadjustment 3. There is no voltage at igniter coil or fuel pump positive terminal. | |
| Engine Starts But Stops When Start Switch is Released | 1. Fault condition. 2. Defective Fault Sensor. 3. Defective relay on engine monitor PCB (A1 1). 4. Defective fault circuit breaker CBI 2. 5. SOVAC not present across AC terminals of engine monitor PCB (A1 1) because of: A. Defective flash diode CR1 B. Defective generator | |
| Low Battery, Generator Set Does Not Recharge | 1. Weak or discharged battery. 2. Load connected to battery while set is turned off. 3. Generator set not run long enough for built-in charger to recharge battery. 4. Defective VR2 voltage regulator. 5. Defective stator winding (B1 -B2). |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Repair guides
1Step-by-step procedures compiled from the Cummins/Onan service manual for this model.
Parts
4| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 927-01 | Oil Filter | 24 | Oil filter | Amazon eBay |
| ES-I374 | Spark plug gap check | Spark plug | Amazon eBay | |
| 0-1174 | Figure 4-6. CHECKING BRUSH WEAR | Service part / kit | Amazon eBay | |
| 518-0347 | Sealant, Thread | 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.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Standby | 100% | 5.0 | 1.3 |
Available documents
Service manual — 927-0505 Onan MCE Ensign series Marine Gensat Service Manual (09-1995) (Cummins/Onan)