Specifications
| Fuel | diesel |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 6 kW |
| Standby kVA | 6 |
| Controller | DC |
| Oil capacity | 4.3 L |
| Phase | 1-Ph |
| Power factor | 1.0 |
| Battery cranking | 500 CCA |
| Battery voltage | 12 V |
| Coolant capacity | 5.0 L |
| Dimensions (L×W×H) | 946×479×562 mm |
| Dry weight | 284 kg |
Filters & service parts
model family| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | find | |||
| Fuel filter | 300-1500 | eBay | |||
| Oil filter | 324-1491 | eBay | |||
| Belt | — | 1000 hr | find | ||
| Coolant | — | 1000 hr | |||
| Oil | — | 200 hr |
Compiled from this model's family documentation — may include parts for closely-related variants. Confirm the exact part for your serial number.
Common questions
What is the power rating of the Cummins/Onan MDKAA?
The Cummins/Onan MDKAA is rated 6 kW standby (6.5 kVA).
What fuel does the Cummins/Onan MDKAA use?
The Cummins/Onan MDKAA runs on diesel.
What oil filter does the Cummins/Onan MDKAA use?
The Cummins/Onan MDKAA uses oil filter part number 324-1491.
What fuel filter does the Cummins/Onan MDKAA use?
The Cummins/Onan MDKAA uses fuel filter part number 300-1500.
Troubleshooting
8Fault codes
| Code | Meaning |
|---|---|
| Check Engine | ‘Check Engine’ Fault Shutdown |
Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Engine does not stop running | Malfunctioning fuel solenoid or linkage | Pull the stop lever to the right and hold it there until the engine stops (see figure). PULL TO RIGHT AND HOLD UNTIL ENGINE STOPS |
| ENGINE DOES NOT CRANK FROM REMOTE PANEL | Emergency Stop Switch OFF; "Check Generator" or "Check Engine" Fault; Faulty remote circuit | Push ON.; Service the fault as necessary and push fault reset button in. See “CHECK ENGINE” FAULT SHUTDOWN or “CHECK GENERATOR” FAULT SHUTDOWN.; Try starting at the genset control panel. If the genset starts, have the remote circuit repaired as necessary. |
| ENGINE DOES NOT CRANK FROM GENSET PANEL | Emergency Stop Switch OFF; "Check Generator" or "Check Engine" Fault; Cranking voltage too low | Push ON.; Service the fault as necessary and push fault reset button in. See “CHECK ENGINE” FAULT SHUTDOWN or “CHECK GENERATOR” FAULT SHUTDOWN.; a. Clean and tighten or replace the positive (+) and negative (- ) battery cable connectors and cables at the battery and the genset. b. Recharge or replace the battery. Specific gravity for a fully charged battery is approximately 1.260 at 80° F (27° C). |
| ENGINE CRANKS BUT DOES NOT START | Engine not getting fuel; Blocked air inlet; Low engine temperature; Cranking voltage too low | A. Open any closed shutoff valve. b. Check fuel level and refill as necessary. c. Prime the fuel system (p. 24). d. Check for fuel (air) leaks at all fittings and tighten as necessary. e. Replace the fuel filter (p. 23).; Service as necessary.; a. Plug in, repair or install engine coolant and engine oil heaters. b. Replace the engine oil if it is not of the recommended viscosity for the ambient temperature.; a. Clean and tighten or replace the positive (+) and negative (- ) battery cable connectors and cables at the battery and the genset. b. Recharge or replace the battery. Specific gravity for a fully charged battery is approximately 1.260 at 80° F (27° C). |
| "CHECK ENGINE" FAULT SHUTDOWN | Low engine oil pressure; High engine temperature; High exhaust temperature | Check engine oil level, repair any leaks and fill to the proper level (p. 17).; a. Check engine coolant level, repair any leaks and fill to the proper level (p. 18). b. Check V-belt tension (p. 20). c. Clean and service the cooling system as required to restore full cooling capacity (p. 18).; a. Open the sea cock. b. Remove any blockage in the sea water strainer. c. Prime the sea water pump (p. 22). d. Replace the sea water pump impeller (p. 22). e. Clean seaweed and pump debris from heat exchanger (p. 22). f. Remove blockage covering the sea water hull strainer. |
| "CHECK GENERATOR" FAULT SHUTDOWN | Generator overload | Run with less load. |
| NO OUTPUT VOLTAGE | A line circuit breaker is Off. A line circuit breaker has Tripped. | Find out why the circuit breaker was turned Off, make sure it is safe to reconnect power, and then throw the circuit breaker On. Shut down the genset and have service performed as necessary to clear the short circuit or ground fault that caused tripping. Then Reset the circuit breaker and start the genset. |
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
18| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 132-0375 | Sea Water Pump Impeller kit w/cover & gasket | Impeller | buy | |
| 132-0379 | Sea Water Pump Impeller | Impeller | buy | |
| 149-2106 | Fuel Filter Element | 1 | Fuel filter | Amazon eBay $36.99 |
| 185-5421 | Plug, Glow | 4 | Glow plug | Amazon eBay |
| 185-5835 | Filter, Oil | 1 | Oil filter | Amazon eBay $21.32 |
| 185-6721 | Breather Filter Element | 1 | Air filter | buy |
| 185-6934 | Water Pump Belt | 1 | Belt | Amazon eBay $39.00 |
| 185-7268 | Glow Plug (24 Volt) | Glow plug | buy | |
| 300-1500 | Fuel Filter | 1 | Fuel filter | eBay |
| 323-1544 | Thermostat | 1 | Thermostat | buy |
| 324-1491 | Oil Filter | 1 | Oil filter | eBay |
| 324-1542 | Fuel Injection Pump | 1 | Pump | buy |
| 612-6673 | Water Pump | 1 | Pump | buy |
| 100-3459-01 | Engine Assy, Replacement (12V) | 1 | Service part / kit | buy |
| 100-3459-02 | Engine Assy, Replacement (24V) | 1 | Service part / kit | buy |
| 100-3478-02 | Cruise Kit | 2 | Service part / kit | buy |
| 130-4434 | Zinc Pencil | 1 | Service part / kit | eBay $32.94 |
| 185-7245 | Block, Cylinder | 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.
Fuel consumption
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Standby | 50% | 1.9 | 0.5 |
| Standby | 100% | 3.0 | 0.8 |
Available documents
Operator's manual — 981-0103B Onan MDKAL MDKAA MDKAB Operator's Manual (1-1998) (Cummins/Onan)Parts manual — 981-0260C Onan MDKAA MDKAB Parts Manual (3-2000) (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 — 981-0524C Onan MDKAL MDKAA MDKAB Marine Diese Genset Service manual (Cummins/Onan)