Specifications
| Fuel | diesel |
|---|---|
| Frequency | 50.0 Hz |
| Standby power | 4 kW |
| Standby kVA | 4 |
| Prime power | 4 kW |
| Emissions | EPA Tier 3 |
| Controller | A1 |
| Oil capacity | 4.0 L |
| Alternator | Single-Bearing, Brushless 4-Pole Rotating Field with Digital Electronic Regulation (4-pole) |
| Voltage options | 110 V, 220 V, 115 V, 230 V, 120 V, 240 V |
| Phase | 1 |
| Rated current | 41.7 A |
| Battery cranking | [360, 500] CCA |
| Battery voltage | ['12 volts', '24 volts'] V |
| Coolant capacity | ['8 quart (7.6 liter)', '8 quart (7.6 liter)'] L |
| Dimensions (L×W×H) | 662×511×524 mm |
| Dry weight | 195 kg |
| Sound level | 71.0 dBA @ 1 m |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | — | 500 hr | find | ||
| Fuel filter | Drain Fuel Filters | 149-2106 | 500 hr | Amazon eBay $36.99 PartsGeek | |
| Oil filter | Oil Filter | — | 1000 hr | find | |
| Belt | Check V-Belt Tension | — | 1000 hr | find | |
| Coolant | Replace Coolant, Pressure Cap & Thermostat | 2.1 liter | — | 2000 hr | |
| Coolant filter | — | find | |||
| Oil | Change Engine Oil and Oil Filter | 2.1 liter | — | 500 hr |
Common questions
What is the power rating of the Cummins/Onan MDKB?
The Cummins/Onan MDKB is rated 4 kW standby (4.0 kVA).
What fuel does the Cummins/Onan MDKB use?
The Cummins/Onan MDKB runs on diesel.
What alternator does the Cummins/Onan MDKB use?
The Cummins/Onan MDKB uses a Single-Bearing, Brushless 4-Pole Rotating Field with Digital Electronic Regulation alternator. It has 4 poles.
What fuel filter does the Cummins/Onan MDKB use?
The Cummins/Onan MDKB uses fuel filter part number 149-2106.
Troubleshooting
61Fault codes
| Code | Meaning | Remedy |
|---|---|---|
| Fault Code No. 4 | The genset does not start after several tries. | |
| CODE NO. 15 | UNDERFREQUENCY—Engine governor unable to maintain rated frequency | 1. Reduce the number of appliances running at the same time, especially those with high motor starting loads such as air conditioners. 2. Check the fuel tank and fill as necessary. (Note: The arrangement of pickup tubes in the fuel supply tank probably is such that the genset will run out of fuel before the propulsion engines.) 3. Remove any blockage in the combustion air inlet (front grille) or exhaust system. 4. Tighten loose fuel line fittings so that air cannot be drawn in by genset lift pump suction. 5. Drain and/or replace the fuel filter (Page 16) and prime the fuel system (Page 8). 6. Drain and/or replace fuel supply system filters and prime the fuel system (Page 8). |
| CODE NO. 17 | OVER-PRIME—Prime mode exceed 5 minutes | Check for and remove any object that may be holding either control switch (remote or local) in the prime position. |
| CODE NO. 22 | GOVERNOR OVERLOAD—Maximum allowable time at full-duty cycle was exceeded | 1. Reduce the number of appliances running at the same time, especially those with high motor starting loads such as air conditioners. 2. Check the fuel tank and fill as necessary. (Note: The arrangement of pickup tubes in the fuel supply tank probably is such that the genset will run out of fuel before the propulsion engines.) 3. Remove any blockage in the combustion air inlet (front grille) or exhaust system. 4. Tighten loose fuel line fittings so that air cannot be drawn in by genset lift pump suction. 5. Drain and/or replace the fuel filter (Page 16) and prime the fuel system (Page 8). 6. Drain and/or replace fuel supply system filters and prime the fuel system (Page 8). |
| CODE NO. 23 | FAULTY OIL PRESSURE SENDER—Controller sensed grounded sender | See an authorized Onan dealer. |
| CODE NO. 24 | FAULTY TEMPERATURE SENDER—Controller sensed open sender | See an authorized Onan dealer. |
| CODE NO. 27 | LOSS OF VOLTAGE SENSE—Controller unable to sense output voltage | See an authorized Onan dealer. |
| CODE NO. 29 | HIGH BATTERY VOLTAGE—Battery system at more than 19.2 volts if 12 VDC system, or 38.4 volts if 24 volt system | 1. Check battery bank connections and reconnect if necessary to supply 12 volts or 24 volts, as appropriate. 2. Select a lower battery boost charge rate. |
| CODE NO. 35 | CONTROL CARD FAILURE—Microprocessor EEPROM error during self-test | See an authorized Onan dealer. |
| CODE NO. 36 | ENGINE STOPPED—Engine stopped without command by controller | 1. Open any closed fuel supply valves. 2. Check the fuel tank and fill as necessary. (Note: The arrangement of pickup tubes in the fuel supply tank probably is such that the genset will run out of fuel before the propulsion engines.) 3. Check for mechanical damage and service as necessary. 4. Remove any blockage in the combustion air inlet (front grille) or exhaust system. 5. Tighten loose fuel line fittings so that air cannot be drawn in by genset lift pump suction. 6. Drain and/or replace the fuel filter (Page 16) and prime the fuel system (Page 8). 7. Drain and/or replace fuel supply system filters and prime the fuel system (Page 8). |
| CODE NO. 37 | INVALID GENSET CONFIGURATION—Controller cannot determine genset operating parameters | See an authorized Onan dealer. |
| CODE NO. 38 | FIELD OVERLOAD—High field voltage induced by high rotor temperature or low power factor loads | 1. Remove blockages to generator air flow at the front inlet grill and right side, if enclosed. 2. Reduce the number of appliances running at the same time, especially those with high motor starting loads such as air conditioners. 3. Have air conditioners and other appliances checked for proper operation. (A locked compressor rotor can cause very low power factor.) |
| CODE NO. 41 | GROUNDED ROTOR—F+ grounded | See an authorized Onan dealer. |
| CODE NO. 42 | PROCESSOR FAILURE—Microprocessor ROM error during self-test | See an authorized Onan dealer. |
| CODE NO. 43 | PROCESSOR FAILURE—Microprocessor RAM error during self-test | See an authorized Onan dealer. |
| CODE NO. 48 | PROCESSOR FAILURE—Controller unable to sense field voltage | See an authorized Onan dealer. |
| CODE NO. 58 | HIGH EXHAUST TEMPERATURE—Exhaust temperature exceeded design limits | 1. Check for and reconnect or replace any disconnected or leaking raw water hoses (Page 19). 2. Check for a and replace a worn raw water impeller(Page 23) |
| 1 | HIGH ENGINE TEMPERATURE | 1. Add coolant as necessary and repair leaks (Page 18). 2. Replace the engine thermostat, which might not be opening fully (Page 21). 3. Clean the raw water tubes in the heat exchanger, which might be clogged with scale (Page 22). 4. Flush the coolant system to remove coolant passage fouling (Page 18). |
| 2 | LOW OIL PRESSURE | Add engine oil or drain excess oil, as necessary (Page 14). |
| 3 | SERVICE CHECK | Check the second-level shutdown code by pressing STOP once. The second-level shutdown code will have two-digits. The shutdowns are listed below in numerical order. |
| 4 | OVERCRANK | 1. Check the fuel tank and fill as necessary. (Note: The arrangement of pickup tubes in the fuel supply tank probably is such that the genset will run out of fuel before the propulsion engines.) 2. Open any closed fuel valves. 3. Remove any blockage in the combustion air inlet (front grille) or exhaust system. 4. Tighten loose fuel line fittings so that air cannot be drawn in by genset lift pump suction. 5. Drain and/or replace the fuel filter (Page 16) and prime the fuel system (Page 8). 6. Drain and/or replace fuel supply system filters and prime the fuel system (Page 8). |
| 7 | LOSS OF RAW WATER FLOW | 1. Open the sea cock. 2. Close the sea cock and clean the sea water strainer. If the strainer is above the water line, fill it with water to assist priming. Secure the strainer cover and reopen the sea cock. 3. Reconnect or replace any disconnected or leaking raw water hoses (Page 19). 4. Remove any blockage from the strainer on the through-hull fitting on the bottom side of the hull. 5. Replace the raw water impeller (Page 23). |
| 12 | OVERVOLTAGE | See an authorized Onan dealer. |
| 13 | UNDERVOLTAGE | Reduce the number of connected appliances, especially when air conditioners and battery chargers are running. |
| 14 | OVERFREQUENCY | 1. If the line circuit breaker or any other circuit breaker has tripped, start the genset before resetting the breaker. (Frequency can overshoot when a circuit breaker trips under load.) If the genset continues to run, turn off or disconnect all loads, reset the breaker and bring the loads on one at a time without overloading the genset. 2. Tighten loose fuel line fittings so that air cannot be drawn in by genset lift pump suction. 3. Prime the fuel system to remove air in the fuel lines (Page 8). |
| 1 or 2 digit code | Status light on the generator will repeatedly blink a 1 or 2 digit code after a protective shutdown | |
| high engine coolant temperature | Common fault such as high engine coolant temperature | |
| high exhaust temperature | Common fault such as high exhaust temperature | |
| low oil pressure | Common fault such as low oil pressure | |
| 1 | HIGH ENGINE TEMPERATURE—CODE NO. 1 (Engine coolant temperature exceed design limit) | 1. Check for and clean a blocked sea water strainer. If above the water line, fill the strainer with water to assist priming. 2. Check engine coolant level and add coolant as necessary. 3. Check for kinked or leaking hoses and reconnect, reroute or replace. 4. Check the V-belt that drives the coolant pump and service as necessary 5. Inspect the siphon break (if provided) for proper operation. 6. Check for a worn raw water impeller and replace as necessary 7. Clean the heat exchanger |
| 2 | LOW OIL PRESSURE—CODE NO. 2 (Low oil pressure) | Check engine oil level, add or drain oil as necessary and repair any leaks |
| 3 | SERVICE CHECK—CODE NO. 3 (A fault with a 2-Digit Fault Code Number occurred) | Check the 2-Digit fault code by Pushing and Releasing Stop |
| 4 | OVERCRANK—CODE NO. 4 (Cranking time exceeded 20 to 60 seconds, depending on ambient temperature) | 1. Check fuel level and refill as necessary. 2. Open any closed fuel supply and return valves. 3. Prime the engine fuel system for at least 30 seconds 4. Service the battery as necessary by cleaning and tightening connections, recharging or replacing the battery or replacing damaged battery cables 5. Replace the fuel filters and reprime 6. Check all fuel fittings for fuel and air leaks, tighten as necessary and reprime. 7. Change the engine oil to oil of the proper viscosity for the ambient temperature |
| 7 | LOSS OF RAW WATER FLOW—CODE NO. 7 (Low raw water pressure in heat exchanger) | 1. Open the sea cock. 2. Check for and clean a blocked sea water strainer. If above the water line, fill the strainer with water to assist priming. 3. Check for kinked or leaking hoses and reconnect, reroute or replace. 4. Check for a worn raw water impeller and replace as necessary 5. Check the bottom of the hull for any blockage at the through-hull fitting. |
| 12 | HIGH AC VOLTAGE—CODE NO. 12 (After voltage regulation was enabled Output Voltage jumped to more than 125% of rated for 75 milliseconds or to more than 115% of rated for 3 seconds) | See an authorized Onan service representative. |
| 13 | LOW AC VOLTAGE—CODE NO. 13 (After voltage regulation was enabled Output Voltage fell to less than 90% of rated for 5 seconds) | Push the genset line circuit breaker OFF. If the genset now runs, reduce the number of loads. |
| 14 | HIGH AC FREQUENCY—CODE NO. 14 (After the starter was engaged Frequency jumped to more than 70 Hz for 40 milliseconds or to more than 2% over nominal for 6 seconds) | 1. Check for a tripped genset circuit breaker, reset it if necessary, and run with fewer connected loads. 2. Check all fuel fittings for fuel and air leaks and tighten as necessary and reprime. |
| 15 | LOW AC FREQUENCY—CODE NO. 15 (During normal operation Frequency fell to less than 90% of nominal for more than 8 seconds) | Push the genset line circuit breaker OFF. If the genset now runs, reduce the number of loads. |
| 1 | Shutdown due to high engine temperature | |
| 2 | Shutdown due to low oil pressure | |
| 3 | Service fault | Press Stop once to cause the two-digit shutdown code to blink |
| 4 | Shutdown due to a failure to start within the time allowed for cranking | |
| 7 | Shutdown due to a loss of raw water flow for engine and exhaust cooling |
Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| NO RESPONSE AT OPERATOR PANEL OR CONTROL SWITCH | Faulty switch, poor or missing connections, dead battery | 1. Push the Emergency Stop Breaker ON if tripped. 2. Try the Operator Panel or control switch on the generator set (local) if there is no response at a remote Operator Panel or control switch, and vice versa.. 3. If none of the Operator Panels or control switches works, service as necessary by cleaning and tightening battery connections, recharging or replacing the battery or replacing damaged battery cables (p. 4-3). |
| THE STARTER ENGAGES AND DISENGAGES | Low cranking voltage | 1. Push the generator set line circuit breaker OFF. 2. Service the battery as necessary by cleaning and tightening connections, recharging or replacing the battery or replacing damaged battery cables (p. 4-3). |
| THE STARTING BATTERIES DO NOT MAINTAIN A CHARGE | Marginal battery, battery connections or charging system | 1. Service the battery as necessary by cleaning and tightening connections, recharging or replacing the battery or replacing damaged battery cables (p. 4-3). 2. Check for and disconnect parasitic battery loads. |
| NO AC POWER WHEN GENERATOR SET IS RUNNING | A Circuit Breaker is OFF | |
| The Digital Display will display a description of the Fault, the numeric Fault code and the accumulated number of hours of generator set operating time when the Fault occurred | Refer to TABLE 5-1. TROUBLESHOOTING GENERATOR SET FAULTS to diagnose and correct the problem. | |
| The Digital Display will display the fault indefinitely. | Touch any button to clear the fault. The Digital Display will turn off in 5 minutes after the fault has been cleared. | |
| The genset fails to start | Cranking will discontinue in 20 to 60 seconds, depending on how cold the engine is, and the amber status lamp will blink Shutdown Code No. 4 (Page 7-5). See Troubleshooting (Page 7-1) if the genset does not start after two or three tries. | |
| The genset shuts down | See Troubleshooting (Page 7-1). | |
| STARTER ENGAGES-DISENGAGES | (Battery voltage dips below 6 volts while cranking—low battery charge, poor connections, long cables) | 1. Clean and tighten the positive (+) and negative (- ) battery cable connections at the battery and gen-set (Page 17). 2. Recharge or replace the battery. Refer to the battery manufacturer’s recommendations. 3. Increase battery cable size or run parallel cables. |
| RUN-DOWN STARTING BATTERY | (Marginal battery, connections, or charging system or, parasitic loads) | 1. Clean and tighten the positive (+) and negative (- ) battery cable connections at the battery and gen-set (Page 17). 2. Recharge or replace the battery. Refer to the battery manufacturer’s recommendations. |
| ENGINE CRANKS, STARTS, ACCELERATES, BUT STOPS WHEN SWITCH LET GO | (Open field or open or grounded quadrature circuit) | Corrective Action: See an authorized Onan dealer. |
| NO LIGHTS, NO RESPONSE | (Poor connections, faulty wiring or dead battery) | 1. Try the genset Control Switch if the remote Control Switch does not work, and vice versa. 2. Clean and tighten the positive (+) and negative (- ) battery cable connections at the battery and gen-set (Page 17). 3. Recharge or replace the battery. Refer to the battery manufacturer’s recommendations. |
| THE STARTER ENGAGES AND DISENGAGES (Low cranking voltage) | Service as necessary by cleaning and tightening battery cable connections, recharging or replacing the battery or replacing damaged battery cables | |
| THE STARTING BATTERIES DO NOT MAINTAIN A CHARGE (Marginal battery, battery connections or charging system) | 1. Service the battery as necessary by cleaning and tightening connections, recharging or replacing the battery or replacing damaged battery cables 2. Inspect the serpentine belt that drives the charging alternator and service as necessary | |
| NO AC POWER WHEN GENSET IS RUNNING (A Circuit Breaker is OFF, tripped or malfunctioning or the generator is not connected properly) | 1. Reset or turn ON the genset circuit breaker if OFF or tripped. 2. Reset or turn ON any other circuit breaker in the AC power supply system if OFF or tripped. | |
| Circuit breaker OFF | If the genset now runs, reduce the number of loads, especially those with high motor starting loads such as air conditioners. Check fuel level and fill as necessary. Prime the engine fuel system for at least 30 seconds (p. 3-3). Check all fuel fittings for fuel and air leaks, tighten as necessary and reprime. Replace the fuel filters and reprime (p. 4-5). | |
| Engine keeps shutting down (Code No. 1) | Heat exchanger tubes are dirty | Clean the raw water tubes |
| Engine gauge indicates abnormally high engine temperatures | Heat exchanger tubes are dirty | Clean the raw water tubes |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
161| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 0098-8374 | GENERATOR CONNECTION DIAGRAM | Connection diagram | PartsGeek | |
| 0500-4199 | OUTLINE DRAWING—MDKBL | Outline drawing | PartsGeek | |
| 120-1386 | Cover, Hydraulic Pump | 1 | Pump | PartsGeek |
| 122-0810 | Oil Filter | 1 | Oil filter | Amazon eBay $36.45 PartsGeek |
| 132-0415 | Pump Impeller | 1 | Impeller | PartsGeek |
| 140-3752 | Air Filter | Air filter | PartsGeek | |
| 149-2106 | Fuel Filter Element | 1 | Fuel filter | Amazon eBay $36.99 PartsGeek |
| 18-0256 | DC Circuit Breaker | 1 | Control switch | PartsGeek |
| 18-0347 | Emergency Stop Switch | 1 | Emergency stop switch | PartsGeek |
| 185-2095 | O'Ring | 1 | Seal | PartsGeek |
| 185-2284 | Gasket * −Parts Included in Control Plate Assy. | 1 | Gasket | PartsGeek |
| 185-2338 | *Gasket | 1 | Gasket | PartsGeek |
| 185-2658 | Switch, Magnetic | 1 | Sensor | PartsGeek |
| 185-5421 | Plug, Glow | 4 | Glow plug | Amazon eBay PartsGeek |
| 185-5835 | Filter, Oil | 1 | Oil filter | Amazon eBay $21.32 PartsGeek |
| 185-6542 | *Gear, Oil Pump Drive | 1 | Pump | PartsGeek |
| 185-6545 | O Ring (Spec A) | 1 | Seal | PartsGeek |
| 185-6579 | Gasket | 1 | Gasket | PartsGeek |
| 185-6866 | Indicator, Oil Level | 1 | Sensor | PartsGeek |
| 185-6934 | Water Pump Belt | 1 | Belt | Amazon eBay $39.00 PartsGeek |
| 185-7055 | Cruise Kit | 2 | Cruise kit | PartsGeek |
| 185-7104 | Starter (12V) | 1 | Starter | PartsGeek FridayParts $167.31 |
| 185-7105 | Starter (24V) | 1 | Starter | PartsGeek |
| 185-7232 | Clutch, Starter (12V) | 1 | Starter | PartsGeek |
| 185-7239 | Switch, Magnetic (24V) | 1 | Sensor | PartsGeek |
| 185-7429 | O Ring (Begin Spec B) | 1 | Seal | PartsGeek |
| 185-7444 | Oil Filter | 1 | Oil filter | Amazon eBay $29.95 PartsGeek |
| 185-7628 | 24V Glow Plugs | 3 | Glow plug | Amazon eBay PartsGeek |
| 415-368 | Air Filter | 1 | Air filter | PartsGeek |
| 415-369 | Oil Filter | 1 | Oil filter | PartsGeek |
| 415-370 | Fuel Filter | 1 | Fuel filter | PartsGeek |
| 415-372 | Spark Plug | 1 | Spark plug | PartsGeek |
| 420-0577 | Oil Filter Wrench | 1 | Oil filter wrench | PartsGeek |
| 420-0624 | Break-out tool for use in conjunction with an accurate digital multi-meter is available for performing stator winding output tests while running the generator set. | 1 | Break out tool | PartsGeek |
| 511-0197 | V-Belt | 1 | Belt | Amazon eBay PartsGeek |
| 511-0201 | V-Belt | 1 | Belt | Amazon eBay PartsGeek |
| F1379 | Siphon Break Kit | Siphon break | PartsGeek | |
| 0900-0625 | Standard Repair Times - BT Family | Service part / kit | PartsGeek | |
| 1000-1500 | Electric Frying Pan or Wok | 1200 | Service part / kit | PartsGeek |
| 112-0319 | Piston Standard | 3 | Service part / kit | PartsGeek |
| 112-0328 | Piston .5mm Oversize | 3 | Service part / kit | PartsGeek |
| 114-0430 | Rod Assy, Connecting | 3 | Service part / kit | PartsGeek |
| 114-0450 | Bushing, Connecting Rod | 3 | Service part / kit | PartsGeek |
| 115-0541 | Tappet (Begin Spec E) | 6 | Service part / kit | PartsGeek |
| 130-4434 | Zinc Pencil | 1 | Service part / kit | eBay $32.94 PartsGeek |
| 1400-2000 | Battery Charger Up to 3000 DC Converter | Service part / kit | PartsGeek | |
| 181-9102 | Bolt, Connecting Rod | 6 | Service part / kit | PartsGeek |
| 181-9120 | Camshaft Assy (Begin Spec E) | 1 | Service part / kit | PartsGeek |
| 184-0071 | Cover, Solenoid (Begin Spec B) | 2 | Service part / kit | PartsGeek |
| 185-2115 | Pin, Pipe | 2 | Service part / kit | PartsGeek |
| 185-2233 | Plug | 2 | Service part / kit | PartsGeek |
| 185-2387 | Bolt | 2 | Service part / kit | PartsGeek |
| 185-2388 | Bolt (Begin Spec E) | 1 | Service part / kit | PartsGeek |
| 185-2572 | Bolt, Flange | 1 | Service part / kit | PartsGeek |
| 185-5484 | Cap, Sealing | 6 | Service part / kit | PartsGeek |
| 185-5486 | Pin Straight | 2 | Service part / kit | PartsGeek |
| 185-5487 | Pin, Straight | 2 | Service part / kit | PartsGeek |
| 185-5490 | Cock Assy, Drain | 1 | Service part / kit | PartsGeek |
| 185-5502 | Plug | 1 | Service part / kit | PartsGeek |
| 185-5523 | Crankcase Breather | 1 | Service part / kit | PartsGeek |
| 185-5558 | Screw, Set | 1 | Service part / kit | PartsGeek |
| 185-5560 | Key, Feather | 1 | Service part / kit | PartsGeek |
| 185-5845 | Part 185-5845 | 1 | Service part / kit | PartsGeek |
| 185-5924 | Ball | 3 | Service part / kit | PartsGeek |
| 185-5938 | Part 185-5938 | 2 | Service part / kit | PartsGeek |
| 185-5941 | Part 185-5941 | 2 | Service part / kit | PartsGeek |
| 185-5942 | Washer, Thrust .2mm Oversize | 2 | Service part / kit | PartsGeek |
| 185-5943 | Washer, Thrust .4mm Oversize | 2 | Service part / kit | PartsGeek |
| 185-6039 | Part 185-6039 | 1 | Service part / kit | PartsGeek |
| 185-6040 | Part 185-6040 | 1 | Service part / kit | PartsGeek |
| 185-6121 | Plug, Expansion | 3 | Service part / kit | PartsGeek |
| 185-6354 | Clutch (24V) | 1 | Service part / kit | PartsGeek |
| 185-6358 | Spring, Brush (24V) | 4 | Service part / kit | PartsGeek |
| 185-6362 | Retainer (24V) | 1 | Service part / kit | PartsGeek |
| 185-6365 | Washer, Felt (24V) | 1 | Service part / kit | PartsGeek |
| 185-6386 | Ring, Snap (12V) | 1 | Service part / kit | PartsGeek |
| 185-6441 | Bearing, Ball (24V) | 1 | Service part / kit | PartsGeek |
| 185-6442 | Bearing, Ball (24V) | 1 | Service part / kit | PartsGeek |
| 185-6468 | Plug | 3 | Service part / kit | PartsGeek |
| 185-6469 | Pin, Pipe | 1 | Service part / kit | PartsGeek |
| 185-6470 | Pin, Pipe | 1 | Service part / kit | PartsGeek |
| 185-6471 | Plug | 1 | Service part / kit | PartsGeek |
| 185-6472 | Bush, Governor Gear | 1 | Service part / kit | PartsGeek |
| 185-6516 | Tappet | 6 | Service part / kit | PartsGeek |
| 185-6517 | Rod, Push | 6 | Service part / kit | PartsGeek |
| 185-6519 | Gear, Cam | 1 | Service part / kit | PartsGeek |
| 185-6520 | Stopper, Camshaft | 1 | Service part / kit | PartsGeek |
| 185-6521 | Gear Assy, Idle (Includes Bushing) | 1 | Service part / kit | PartsGeek |
| 185-6522 | Bushing, Idle Gear | 1 | Service part / kit | PartsGeek |
| 185-6523 | Collar, Idle Gear | 1 | Service part / kit | PartsGeek |
| 185-6524 | Collar, Idle Gear | 1 | Service part / kit | PartsGeek |
| 185-6525 | Circlip, Idle Gear | 1 | Service part / kit | PartsGeek |
| 185-6526 | Shaft, Idle Gear | 1 | Service part / kit | PartsGeek |
| 185-6531 | Pin, Piston | 3 | Service part / kit | PartsGeek |
| 185-6532 | Circlip, Piston Pin | 6 | Service part / kit | PartsGeek |
| 185-6533 | Rod Assy, Connecting | 3 | Service part / kit | PartsGeek |
| 185-6534 | Bushing, Connecting Rod | 3 | Service part / kit | PartsGeek |
| 185-6535 | Bolt, Connecting Rod | 6 | Service part / kit | PartsGeek |
| 185-6536 | Bearing, Connecting Rod Standard | 3 | Service part / kit | PartsGeek |
| 185-6537 | Bearing, Connecting Rod .2mm Undersize | 3 | Service part / kit | PartsGeek |
| 185-6538 | Bearing, Connecting Rod .4mm Undersize | 3 | Service part / kit | PartsGeek |
| 185-6540 | Gear, Crankshaft | 1 | Service part / kit | PartsGeek |
| 185-6541 | Key | 1 | Service part / kit | PartsGeek |
| 185-6543 | Sleeve, Crankshaft | 1 | Service part / kit | PartsGeek |
| 185-6544 | Collar, Crankshaft | 1 | Service part / kit | PartsGeek |
| 185-6546 | Bearing, Crankshaft | 1 | Service part / kit | PartsGeek |
| 185-6547 | Bearing, Crankshaft .2mm Undersize | 1 | Service part / kit | PartsGeek |
| 185-6548 | Bearing, Crankshaft .4mm Undersize | 1 | Service part / kit | PartsGeek |
| 185-6549 | Bearing, Crankshaft | 2 | Service part / kit | PartsGeek |
| 185-6550 | Bearing, Crankshaft .2mm Undersize | 2 | Service part / kit | PartsGeek |
| 185-6551 | Bearing, Crankshaft .4mm Undersize | 2 | Service part / kit | PartsGeek |
| 185-6553 | Bearing, Crankshaft .2mm Undersize | 1 | Service part / kit | PartsGeek |
| 185-6554 | Bearing, Crankshaft .4mm Undersize | 1 | Service part / kit | PartsGeek |
| 185-6555 | Washer, Thrust .2mm Oversize | 2 | Service part / kit | PartsGeek |
| 185-6556 | Washer, Thrust .4mm Oversize | 2 | Service part / kit | PartsGeek |
| 185-6578 | Cover, Solenoid | 2 | Service part / kit | PartsGeek |
| 185-6759 | Part 185-6759 | 1 | Service part / kit | PartsGeek |
| 185-6856 | Plug | 1 | Service part / kit | PartsGeek |
| 185-6857 | Pin, Start Spring | 1 | Service part / kit | PartsGeek |
| 185-6873 | Camshaft Assy | 1 | Service part / kit | PartsGeek |
| 185-7212 | Plug | 1 | Service part / kit | PartsGeek |
| 185-7230 | Holder, Brush (12V) | 1 | Service part / kit | PartsGeek |
| 185-7231 | Armature (12V) | 1 | Service part / kit | PartsGeek |
| 185-7233 | Bearing, Oilless (12V) | 1 | Service part / kit | PartsGeek |
| 185-7234 | Gear (12V) | 3 | Service part / kit | PartsGeek |
| 185-7235 | Ring, Snap (12V) | 1 | Service part / kit | PartsGeek |
| 185-7236 | Collar (12V) | 1 | Service part / kit | PartsGeek |
| 185-7237 | Brush, Yoke (24V) | 2 | Service part / kit | PartsGeek |
| 185-7238 | Armature (24V) | 1 | Service part / kit | PartsGeek |
| 185-7240 | Holder Assy, Brush (24V) | 1 | Service part / kit | PartsGeek |
| 185-7245 | Block, Cylinder | 1 | Service part / kit | PartsGeek |
| 185-7296 | Gear, Pinion (24V) | 5 | Service part / kit | PartsGeek |
| 185-7302 | Block, Cylinder | 1 | Service part / kit | PartsGeek |
| 185-7308 | Piston | 3 | Service part / kit | PartsGeek |
| 185-7309 | Piston .5mm Oversize | 3 | Service part / kit | PartsGeek |
| 185-7310 | Ring Assy, Piston, Standard | 3 | Service part / kit | PartsGeek |
| 185-7311 | Ring Assy, Piston, .5mm Oversize | 3 | Service part / kit | PartsGeek |
| 185-7372 | Block, Cylinder | 1 | Service part / kit | PartsGeek |
| 185-7376 | Crankshaft | 1 | Service part / kit | PartsGeek |
| 185-7420 | Pin, Straight | 2 | Service part / kit | PartsGeek |
| 185-7430 | Bearing, Crankshaft Standard | 1 | Service part / kit | PartsGeek |
| 191-2252 | Roller (24V) | 5 | Service part / kit | PartsGeek |
| 200-500 | Electric Blanket | Service part / kit | PartsGeek | |
| 200-600 | Radio | 1 | Service part / kit | PartsGeek |
| 250-750 | Electric Broom | Service part / kit | PartsGeek | |
| 300-700 | Refrigerator | Service part / kit | PartsGeek | |
| 323-1491 | * Pin, Contact (Used With Inline G) | 3 | Service part / kit | PartsGeek |
| 323-1492 | * Socket, Contact (Used In Stations 18, 19) | 4 | Service part / kit | PartsGeek |
| 350-1000 | Electric Water Heater | Service part / kit | PartsGeek | |
| 50-200 | Electric Drill | 1 | Service part / kit | PartsGeek |
| 500-1200 | Electric Hair Dryer | Service part / kit | PartsGeek | |
| 550-750 | Television | Service part / kit | PartsGeek | |
| 600-1000 | Microwave Oven | 1 | Service part / kit | PartsGeek |
| 800-1500 | Coffee Percolator | Service part / kit | PartsGeek | |
| 800-6548 | Bolt, Hex Socket Head | 2 | Service part / kit | PartsGeek |
| 981-0176 | Redistribution or publication of this document, by any means, is strictly prohibited. California | Service part / kit | PartsGeek | |
| 981-0181 | Service part / kit | PartsGeek | ||
| F1117-0002 | Warranty Manual | Service part / kit | PartsGeek | |
| FA-000111222 | Brightness and Contrast Screen | 1 | Service part / kit | PartsGeek |
| FA-333444555 | Display Setup Screen | 1 | Service part / kit | PartsGeek |
| FA-666777888 | Generator Set and Display Information Screen | 1 | Service 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
| Rating | Load | L/h | gal/h |
|---|---|---|---|
| Full_load | 4.9 | 3.0 | |
| Full_load | 100% | 2.3 | 0.6 |
| Half_load | 3.0 | 1.8 | |
| Half_load | 50% | 1.3 | 0.35 |
| Prime | |||
| Standby | |||
| Standby | 0% | 0.8 | 0.3 |
| Standby | 0% | 1.0 | 0.3 |
| Standby | 0% | 1.3 | 0.4 |
| Standby | 1% | 1.7 | 0.4 |
| Standby | 25% | 1.0 | 0.27 |
| Standby | 50% | 1.3 | 0.35 |
| Standby | 75% | 1.7 | 0.44 |
| Standby | 100% | 2.1 | 0.55 |
Available documents
Spec sheet — 0059599 (Cummins/Onan)Spec sheet — 981-0630 Onan MDKAV thru MDKBG Installation Manual (7-2013) (Cummins/Onan)Spec sheet — F-1487K Cummins-Onan Marine Generators Pocket Guide (09-2012) (Cummins/Onan)Installation manual — 981-0642B Onan MDKBK thru MDKBS Installation Manual (11-2005) (Cummins/Onan)Installation manual — 981-0642C Onan MDKBK thru MDKBU Installation Manual (1-2007) (Cummins/Onan)Operator's manual — 981-0163B Cummins MDKAV - MDKAZ MDKBD - MDKBG Operator's Manual (6-2002) (Cummins/Onan)Operator's manual — 981-0175C Onan MDKBK thru MDKBU Operator's Manual (1-2007) (Cummins/Onan)Operator's manual — 981-0175D Onan MDKBK thru MDKBU Operator's Manual (6-2007) (Cummins/Onan)Operator's manual — 981-0176 ONAN MDKBH Marine Genset Operator's manual (06-2005) (Cummins/Onan)Operator's manual — 981-0818 Onan MDKBx spc A-F Marine Generator series Operators Manual 02-2010 (Cummins/Onan)Parts manual — 981-0270 Onan MDKBD MDKBE MDKBF Parts Manual (6-2012) (Cummins/Onan)Parts manual — 981-0280 Onan MDKBL MDKBN MDKBN Parts Manual (3-2015) (Cummins/Onan)Parts manual — 981-0281 Onan MDKBP MDKBR MDKBS Parts Manual (1-2014) (Cummins/Onan)Parts manual — F-0672M Cummins-Onan Marine Generator Accy & Support Catalog (07-2003) (Cummins/Onan)Parts manual — F-1379-ENParts manual — NET-Onan (Cummins/Onan)Service manual — 900-0620B Onan MDKAU MDKBH Repair Times (Cummins/Onan)Service manual — 900-0624 Onan MDKAV - MDKBN Repair Times (Cummins/Onan)Service manual — 900-0625 Onan MDKBx Repair Times (Cummins/Onan)Service manual — 981-0181 Onan MDKBx Marine Genset Operator manual (03-2008) (Cummins/Onan)Service manual — 981-0534B Onan MDKAV thru MDKAZ MDKBD thru MDKBG Service Manual (6-2002) (Cummins/Onan)Service manual — 981-0542 Onan MDKBH Service Manual (11-2005) (Cummins/Onan)Service manual — 981-0543B Onan MDKBK thru MDKBS Manual (11-2005) (Cummins/Onan)Service manual — 981-0543C Onan MDKBK thru MDKBU Service Manual (1-2007) (Cummins/Onan)Service manual — 981-0630C Onan MDKAV thru MDKBG Installation Manual (2-2004) (Cummins/Onan)Service manual — 981-0643 Onan MDKBH Installation Manual (6-2005) (Cummins/Onan)Service manual — 981-0647 Onan MDKBH Spec A-E Installation Manual (10-2013) (Cummins/Onan)Service manual — 981-0648 Onan MDKBK thru MDKBV Installation Manual (10-2013) (Cummins/Onan)Service manual — F-1576Service manual — Manual Operador Marino QD 6kWz (Cummins/Onan)Service manual — eqdpartscard (Cummins/Onan)