Service parts for the MDKAW
Grouped by system, with how many of each the parts manual calls for.
Fuel system
1 requiredBelts
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 |
| Controller | A1 |
| Oil capacity | 4.3 L |
| Alternator | Single-Bearing, Brushless 4-Pole Rotating Field with Digital Electronic Regulation |
| Battery cranking | 500 CCA |
| Battery voltage | 12 volts (24 volts optional) V |
| Coolant capacity | 5.0 L |
| Dimensions (L×W×H) | 1033×566×585 mm |
| Dry weight | 290 kg |
| Sound level | 66.0 dBA |
Engine
| Oil capacity | 4.3 L |
|---|---|
| Coolant capacity | 5.0 L |
| Displacement | 1.335 L |
| Aspiration | 4-Stroke Cycle, Indirect Injection, Water Cooled Diesel |
| Rated speed | 3000 rpm |
Filters for the Kubota V1305
4Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.
Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Oil filter | P550162 | Lube Filter, Spin-On Full Flow | KUBOTA 1524132040, KUBOTA 1542132090, NAPA 1301, NAPA 1334 | FridayParts $10.50 |
| Oil filter | P550227 | Lube Filter, Spin-On Full Flow | KUBOTA 1521332430, KUBOTA 6602136060, LPM 00013505345, WALGAHN-MOTORENTECHN 00811292 | KuduParts $18.00 FridayParts $20.25 |
| Fuel filter | P550012 | Fuel Filter, In-Line | KUBOTA 1258143010, KUBOTA 1258143011, BALDWIN BF840-K1, RENAULT VI 0005490862 | KuduParts $13.00 FridayParts $15.50 |
| Fuel filter | P550127 | Fuel Filter, Spin-On | KUBOTA 1522143170, KUBOTA 1522143171, NAPA 3390, WALGAHN-MOTORENTECHN 00811936 | KuduParts $16.00 |
Same engine, other brands
1 brandThe Kubota V1305 in this set also powers 2 generator sets sold under 1 other brand. Service parts and maintenance intervals for the engine are shared; enclosure, alternator, controller and ratings are not.
| Brand | Models |
|---|---|
| Kubota | 4318, J 310 |
Maintenance & consumables
for the Kubota V1305| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | N/A | — | 500 hr | ||
| Fuel filter | Fuel Filter | 149-2106 | Amazon eBay $34.99 NAPA $61.61 KuduParts $68.00 | ||
| Oil filter | Oil Filter | 122-0810 | Amazon eBay $12.39 NAPA $3.59 | ||
| Battery | 12 V (55 Ah) | — | 500 hr | ||
| Belt | V-Belt | 511-0201 | Amazon eBay $19.99 | ||
| Oil | API CD | 5.7 l | — | 100 hr |
Compatible filters for the Kubota V1305 — cross-referenced via Donaldson. Options to verify against your serial number, not confirmed for this exact unit.
- Air filter: Kubota K318182240 Kubota K318182250 Donaldson P778979 Donaldson P780018 Wix 49978
Service intervals
19| Item | Action | Hours | Months | Notes |
|---|---|---|---|---|
| Engine Oil Level | Check | 8 hr | Every Day/8 Hrs | |
| Fuel Filter | Drain | 8 hr | ||
| Fuel Filters | Drain | 8 hr | Daily, 8-Hr | |
| General Inspection | Check | 8 hr | Daily, 8-Hr; includes Oil Level, Coolant Level, Fuel System, Exhaust System, Battery, and Sea Water Strainer Checks. | |
| General Inspection | Inspect | 8 hr | Includes Oil Level, Coolant Level, Fuel System, Exhaust System and Battery Checks | |
| Battery | Check | 100 hr | 1 mo | See battery manufacturer's recommendations |
| Siphon Break | Check | 500 hr | 12 mo | Monthly, 100-Hr |
| Water in Fuel | Drain | 100 hr | Every Month/100 Hrs; drain more often if fuel quality is poor or condensation cannot be avoided | |
| Zinc Anode | Replace | 500 hr | 12 mo | Monthly, 100-Hr; Model MDKAU does not have a zinc anode to replace. |
| Oil & Oil Filter | Change | 200 hr | 12 mo | First service — Every Year/200 Hrs |
| Oil/Oil Filter | Change | 200 hr | First service — Yearly, 200-Hr | |
| Fuel Filter | Change | 500 hr | 12 mo | Yearly, 500-Hr; Model MDKAU—500 hours |
| Pump Impeller | Replace | 500 hr | Yearly, 500-Hr | |
| Raw Water Impeller | Replace | 500 hr | 12 mo | Every Year/500 Hrs |
| Generator Bearing | Check | 2000 hr | Must be performed by trained/experienced mechanic per Service Manual | |
| Generator Bearing(s) & Drive Belt | Check | 800 hr | 800-Hr; must be performed by a trained and experienced mechanic; only Model MDKAU has a drive belt and two generator bearings. | |
| Valve Lash | Adjust | 800 hr | Must be performed by trained/experienced mechanic per Service Manual | |
| Coolant, Pressure Cap & Thermostat | Change | 2000 hr | 60 mo | Every 2 years |
| V-Belt Tension | Check | 500 hr | 12 mo | Monthly, 100-Hr; check for slippage, cracking and wear (pump drive belt only) |
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
45| Type | Item | Value | Unit | Condition |
|---|---|---|---|---|
| Clearance | V-Belt Tension Deflection | 0.4 | inch (10 mm) @ 20 lbs (10 kg) | |
| Clearance | V-belt deflection | 0.4 inch (10 mm) | inch (mm) | 20 lbs (10 kg) applied to middle of pulley span |
| Compression | Compression Ratio (MDKAV/MDKAW/MDKAZ) | 22:1 | ||
| Compression | Compression Ratio (MDKBD/MDKBE/MDKBF) | 23:1 | ||
| Injection timing | Fuel Injection Timing | 15.5 - 17.5 | ° BTDC | |
| Injection timing | Fuel injection timing | 15.5 - 17.5 degrees BTDC | degrees BTDC | |
| Other | Fuel pump delivery rate | 2/3 liter per minute (1 liter in 1-1/2 minutes) | liter/min | prime mode |
| Pressure | Engine oil pressure (minimum) | 14 psi (98 kPa) | psi (kPa) | engine running |
| Pressure | Engine oil pressure sender E1 resistance | 227-257 ohms | ohms | engine idle (0 psi) |
| Pressure | Raw water flow switch S6 test pressure | 1 psi | psi | blowing into switch while checking continuity |
| Resistance | Engine coolant temperature sender E2 resistance | approximately 800 ohms | ohms | room temperature |
| Resistance | Engine oil pressure sender E1 resistance | 50-200 ohms | ohms | engine running with normal oil pressure (reasonably steady) |
| Resistance | Exciter rotor winding resistance | 0.58-0.71 ohms | ohms | all reference lengths |
| Resistance | Exciter stator winding resistance | 13-16 ohms | ohms | all reference lengths |
| Resistance | Main rotor winding resistance | 2.54-3.10 ohms | ohms | reference length 341 mm (13.4 in) |
| Resistance | Main winding resistance (12-lead generators) | 0.36-0.44 ohms | ohms | reference length 341 mm (13.4 in) |
| Resistance | Main winding resistance (4-lead generators) | 0.179-0.197 ohms | ohms | reference length 341 mm (13.4 in) |
| Resistance | Quadrature winding resistance (12-lead generators) | 2.961-3.219 ohms | ohms | reference length 341 mm (13.4 in) |
| Resistance | Quadrature winding resistance (4-lead generators) | 1.716-1.864 ohms | ohms | reference length 341 mm (13.4 in) |
| Resistance | Winding insulation resistance | at least 5 megohms (new, dry windings); not less than 1 megohm in service | megohms | 500 VAC megger, 10 minute test |
| Resistance | Winding polarization index | at least 2 | ratio of 10-minute to 1-minute insulation resistance | |
| Speed | Cranking duration before overcrank | 20-60 seconds | seconds | engine temperature dependent |
| Speed | Preheat (glow plug) duration | up to 15 seconds | seconds | before cranking, engine temperature dependent |
| Speed | Starter disconnects | 800 rpm | rpm | during startup |
| Torque | Diode terminal screws / main rotor terminals | 24 lb-in (2.6 N-m) | lb-in (N-m) | |
| Torque | Disc hub bolt (6) | 50-57 N-m (37-42 lb-ft) | N-m (lb-ft) | torque dry |
| Torque | Drive disc bolt (6) | 27-31 N-m (20-23 lb-ft) | N-m (lb-ft) | torque dry |
| Torque | End bell cover plate screws (4) | 3.8 N-m (8 lb-in) | N-m (lb-in) | |
| Torque | Exciter stator mounting screws | 11 N-m (8 lb-ft) | N-m (lb-ft) | |
| Torque | Exhaust manifold nuts (2 per port) | 9.5-12.2 lb-ft (12.9-16.6 N-m) | lb-ft (N-m) | |
| Torque | Exhaust manifold nuts and mixer or dry exhaust flange bolts (4) | 16-23 lb-ft (21-32 N-m) | lb-ft (N-m) | |
| Torque | Generator through bolt (4) | 38-43 N-m (28-32 lb-ft) | N-m (lb-ft) | torque dry |
| Torque | Governor actuator mounting screws | 7-9 lb-ft (9.5-12.2 N-m) | lb-ft (N-m) | |
| Torque | Starter mounting bolts | 29 lb-ft (39 N-m) | lb-ft (N-m) | |
| Torque | Vibration isolator through bolts | 27-33 lb-ft (37-44.7 N-m) | lb-ft (N-m) | |
| Torque | Water-exhaust mixer flange bolts (4) | 15-19 lb-ft (20-25.7 N-m) | lb-ft (N-m) | |
| Torque | Wet exhaust hose adapter flange bolts (3) | 6.4-9.6 lb-ft (8.7-13.0 N-m) | lb-ft (N-m) | |
| Valve clearance | Valve Lash | 0.0071 - 0.0087 | in (0.18 - 0.22 mm) | cold |
| Valve clearance | Valve Lash | 0.0071 - 0.0087 in (0.18 - 0.22 mm) | in (mm) | cold |
| Valve clearance | Valve lash | 0.0071-0.0087 in (0.18-0.22 mm) | in (mm) | cold |
| Voltage | High Battery Voltage Shutdown | 19.2 (12VDC system) / 38.4 (24 volt system) | volts | |
| Voltage | High battery voltage threshold (12 VDC system) | more than 19.2 volts | volts | code 29 |
| Voltage | High battery voltage threshold (24 VDC system) | more than 38.4 volts | volts | code 29 |
| Voltage | Voltage adjustment per control switch press | approximately 0.6 volt | volt | voltage set mode, genset running |
| Voltage | Voltage adjustment per switch press | 0.6 | volt | each time control switch is released |
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 water/ethylene glycol | Shipped with 50/50 water/ethylene glycol coolant. | |||
| Coolant | 50/50 ethylene glycol/water mixture | Fully formulated with rust inhibitors and coolant stabilizers | above -37°C | 5.0 liter | MDKAW, MDKAZ |
| Coolant | 50/50 mixture of water and ethylene glycol antifreeze | Fully formulated with rust inhibitors and coolant stabilizers; use low-mineral fresh water (distilled best) | above -37°C | 4.0 liter | MDKAV, MDKBG; mixture good for -34 F (-37 C) |
| Coolant | ethylene glycol antifreeze, 50/50 mixture with water | above -37°C | Good to -34F (-37C) | ||
| Engine oil | 15W40 | Gensets are shipped with 15W40 engine oil. | |||
| Engine oil | API CH-4 or better, SAE 15W-40 recommended year-round | API/SAE | Synthetic motor oil not recommended | ||
| Engine oil | SAE 15W-40 | API Class CH-4 or better | 4.3 liter | MDKAW, MDKAZ | |
| Engine oil | SAE 15W-40 (multi-grade recommended for year-round use; choose viscosity grade per ambient temperature) | API Performance Class CH-4 or better | 4.0 liter | MDKAV, MDKBG; synthetic motor oil not recommended | |
| Fuel | No. 2 diesel (ASTM Grade 2-D) | ASTM | Cetane number not less than 45, sulfur content not more than 0.5% by weight | ||
| Fuel | No. 2 diesel fuel (ASTM Grade 2-D) | Cetane number not less than 45; sulfur content not more than 0.5 percent by weight; cloud point at least 10 F (6 C) below lowest expected fuel temperature | Keep fuel tanks full to reduce condensation |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Fault codes
26| Code | Name | Meaning | Severity | Action |
|---|---|---|---|---|
| 1 | High Engine Temperature | One blink indicates shutdown due to high engine temperature. | Shutdown | Check coolant temperature, coolant level, temperature sender resistance, control plugs fully seated, grounded or shorted sender or gauge lead, sender to control; then check raw water flow, raw water impeller, heat exchanger blockage, pressure cap. |
| 12 | Overvoltage | Controller unable to maintain rated voltage | Shutdown | See an authorized Onan dealer |
| 13 | Undervoltage | Controller unable to maintain rated voltage | Shutdown | Reduce number of connected appliances |
| 14 | Overfrequency | Engine governor unable to maintain rated frequency | Shutdown | Reset breaker after starting, tighten fuel fittings, prime fuel system |
| 15 | Underfrequency | Engine governor unable to maintain rated frequency | Shutdown | Reduce loads; check fuel supply and filters; fuel pump flow test; replace governor actuator; service injectors/injection pump; check timing; replace controller A1. |
| 17 | Overprime | Prime mode exceeded 5 minutes | Shutdown | Remove object holding control switch in prime position |
| 2 | Low Oil Pressure | Two blinks indicate shutdown due to low oil pressure. | Shutdown | Check oil level; check sender E1/wiring at P1 Pin 10; verify oil pressure at least 14 psi (98 kPa); service lubricating system or replace sender/controller. |
| 22 | Governor Overload | Maximum allowable time at full-duty cycle was exceeded | Shutdown | Reduce loads; check fuel supply and filters; fuel pump test; replace governor actuator; service injectors/pump; check injection timing; replace controller A1. |
| 23 | Faulty Oil Pressure Sender | Controller sensed grounded sender | Shutdown | See an authorized Onan dealer |
| 24 | Faulty Temperature Sender | Controller sensed open sender | Shutdown | Tighten sender E2 terminal; measure sender resistance and replace if open; check wiring to P1 Pin 9. |
| 27 | Loss of Voltage Sense | Controller unable to sense output voltage | Shutdown | See an authorized Onan dealer |
| 29 | High Battery Voltage | Battery system at more than 19.2V (12VDC) or 38.4V (24V) | Shutdown | Check battery voltage, battery connections, battery charge rate. |
| 3 | Service Required | Three blinks indicate shutdown requiring service by trained and experienced service personnel. | Shutdown | Press STOP once to display the two-digit second-level shutdown code. |
| 35 | Control Card Failure | Microprocessor EEPROM error during self-test | Shutdown | Verify fault. |
| 36 | Engine Stopped | Engine stopped without command by controller | Shutdown | Open fuel valves, check fuel tank, check mechanical damage, remove blockage, prime |
| 37 | Invalid Set Configuration | Controller cannot determine genset operating parameters | Shutdown | See an authorized Onan dealer |
| 38 | Field Overload | High field voltage induced by high rotor temperature or low power factor loads | Shutdown | Remove blockages to generator airflow, reduce appliances |
| 4 | Overcrank | Four blinks indicate shutdown due to a failure to start within the time allowed for cranking. | Shutdown | Check fuel tank, open valves, remove blockage, tighten fittings, replace fuel filter, prime |
| 41 | Grounded Rotor | F+ grounded | Shutdown | Verify fault. |
| 42 | Processor Failure | Microprocessor ROM error during self-test | Shutdown | Verify fault. |
| 43 | Processor Failure | Microprocessor RAM error during self-test | Shutdown | Verify fault. |
| 48 | Processor Failure | Controller unable to sense field voltage | Shutdown | Verify fault. |
| 58 | High Exhaust Temperature | Exhaust temperature rises because of loss of water | Shutdown | Reconnect/replace raw water hoses, replace impeller |
| 59 | Low Coolant Level | Low coolant level shutdown | Shutdown | Add coolant, repair leaks |
| 61 | Emergency Shutdown | Shutdown caused by fire suppression system or external emergency system closing contacts across J6 and J7 | Shutdown | Make necessary repairs and reset external control |
| 7 | Loss of Raw Water Flow | Water stops flowing | Shutdown | Open sea cock; clean strainer; check hoses; replace impeller; test flow switch and wiring. |
Extracted from the manufacturer documentation linked to this model. Values are copied as printed; confirm against your unit's manual and serial number.
Procedures
12Adjusting Frequency adjustment
Tools: Screwdriver
- Remove access cover on left end of genset.
- Find leads marked J8 HZ, 60 HZ and 50 HZ in wiring harness.
- Connect 60 HZ or 50 HZ lead to J8 HZ as appropriate.
- Secure access cover with four screws.
Adjusting V-Belt Tension adjustment
⚠ Disconnect negative battery cable to prevent accidental starting
Tools: Wrenches, Spring scale or 20 lbs (10 kg) weight, Rule
- Disconnect negative battery cable at the battery.
- Remove belt guard or access doors and top panel if enclosed.
- Loosen alternator pivot bolt first, then adjusting bracket bolt on top.
- Pivot alternator out to tighten belt tension.
- Hold tension and tighten tension adjusting bolt.
- Check deflection 0.4 inch (10 mm) with 20 lbs (10 kg) mid-span.
- Tighten alternator bolts; secure guards and reconnect battery (negative last).
Adjusting Voltage adjustment
⚠ Hazardous voltage; touching live parts can cause severe personal injury or death
Tools: Accurate AC voltmeter and frequency meter
- Disconnect all generator loads and connect accurate AC volt and frequency meters.
- Start genset and let voltage and frequency stabilize 5 to 10 seconds.
- Rapidly press control switch to START 6 times within 10 seconds.
- Amber lamp blinks once per second to confirm voltage set mode.
- To raise voltage, press START and release quickly (about 0.6 volt per step).
- To lower voltage, press START and release in approximately 2 seconds.
- Normal operation resumes 20 seconds after last adjustment.
Drive Belt, Water Pump - Adjust / Replace adjustment
- Disconnect and connect battery cables, engine wiring harness, fuel lines, exhaust hose, coolant hoses
- Drain and refill engine fluids
- Remove and install soundshield as needed
- Remove and install pump drive belt
- Adjust belt tension
- Test run unit
Frequency Adjustment adjustment
- Remove the access cover on the left end of the genset.
- Find the leads marked J8 HZ, 60 HZ and 50 HZ in the wiring harness.
- Connect 60 HZ or 50 HZ to J8 HZ as appropriate.
- Secure the access cover (4 screws).
Valves - Adjust adjustment
- Disconnect and connect battery cables, engine wiring harness, fuel lines, exhaust hose, coolant hoses
- Drain and refill engine fluids
- Remove and install soundshield as needed
- Remove and install glowplugs
- Remove and install valve cover
- Adjust valve lash
- Test run unit
Voltage Adjustment adjustment
⚠ HAZARDOUS VOLTAGE! Touching uninsulated live parts inside the genset or connected equipment can result in severe personal injury or death.
Tools: Accurate AC voltmeter, Frequency meter
- Make proper fuel, exhaust, raw water and battery connections; ensure proper oil and coolant levels.
- Disconnect all generator loads and connect meters to measure AC volts and frequency.
- Start the genset and let voltage and frequency stabilize for 5 to 10 seconds.
- Rapidly press the control switch to START 6 times within 10 seconds.
- To raise voltage, press START and release quickly; each release raises voltage about 0.6 volt.
- To lower voltage, press START and release in about 2 seconds; each release lowers voltage about 0.6 volt.
- Normal operation resumes 20 seconds after the last adjustment.
Exhaust Water Separator Backflow Test diagnostic
⚠ Backflow can cause major engine damage if the cylinders become flooded.
- Conduct during sea trials together with the RAW WATER PICKUP TEST.
- Close the drain hose sea cock and disconnect the hose from the water separator.
- Open the sea cock while keeping the hose raised to its fitting on the water separator.
- Verify there is no backflow while operating the boat throughout its speed range; if there is, relocate the through-hull fitting.
Genset - Test with Load Bank diagnostic
Tools: Load bank
- Disconnect and connect engine wiring harness as needed
- Disconnect and connect load bank
- Test run unit
Raw Water Pickup Test diagnostic
⚠ Be ready to close the sea cock and catch water that spills.
- Load the boat fully for sea trials, shut down the genset, and disconnect the raw water pickup hose from the genset bulkhead fitting.
- Raise and lower the end of the hose; the water line is where water just begins to spill.
- Mark the highest water line observed while operating the boat throughout its speed range, and mark the line while docked.
- If either water line is within 6 inches (152 mm) of the engine exhaust-water mixer, install a siphon-break device.
Troubleshoot - Engine Will Not Crank diagnostic
- Check battery condition, battery voltage, battery connections
- Evaluate fault codes
- Check manual engine rotation
- Check wiring connections to and from control, relay, switch, and starter
- Check K4 relay operation
- Check Start/Stop switch
- Check starter
Remote Control Panel and Connector Wiring installation
- Remove the access cover and the rubber plug in the grommet slot.
- Pull the connector out, fit the grommet into the slot and secure the access cover (4 screws).
- Join the connector with its mate from the remote control panel.
- Use 16 AWG wires and sealed 8-pin Deutsch connectors for the wiring harness.
- Use 14 AWG wires for connector pins 2, 3 and 4 if harness length is 45 to 150 feet (14 to 46 meters).
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 engine is in the Cummins/Onan MDKAW?
The Cummins/Onan MDKAW is powered by the Kubota V1305 engine.
What kind of fuel does the Cummins/Onan MDKAW run on?
The Cummins/Onan MDKAW runs on Diesel.
What is the oil capacity of the Cummins/Onan MDKAW?
The Kubota V1305 engine in the Cummins/Onan MDKAW has an oil capacity of 4.3 liters.
What is the coolant capacity of the Cummins/Onan MDKAW?
The Cummins/Onan MDKAW cooling system holds 5 liters (1.3 US gallons) for the radiator system including the engine, per the manufacturer specification sheet.
How loud is the Cummins/Onan MDKAW?
The Cummins/Onan MDKAW is rated at 66.0 dBA, per the manufacturer specification sheet.
What is the dry weight of the Cummins/Onan MDKAW?
The Cummins/Onan MDKAW has a dry weight of 290 kg (639 lb).
What size battery does the Cummins/Onan MDKAW need?
The Cummins/Onan MDKAW uses 12 volts (24 volts optional) V each, 500 CCA, per the manufacturer specification sheet.
Which alternator is fitted to the Cummins/Onan MDKAW?
The Cummins/Onan MDKAW uses a Single-Bearing, Brushless 4-Pole Rotating Field with Digital Electronic Regulation alternator.
Which oil filter part number does the Cummins/Onan MDKAW take?
The Cummins/Onan MDKAW uses oil filter part number 122-0810.
Which fuel filter part number does the Cummins/Onan MDKAW take?
The Cummins/Onan MDKAW uses fuel filter part number 149-2106.
What air filter fits the Cummins/Onan MDKAW?
The Cummins/Onan MDKAW uses air filter part numbers KUBOTA K318182240, KUBOTA K318182250.
Troubleshooting
6Fault codes
| Code | Meaning | Remedy |
|---|---|---|
| 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. |
Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| 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). |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan MDKAW troubleshooting guide (30 entries) →
Repair guides
13- Changing Coolant (Drain and Fill)
- Controller A1 Removal / Replacement
- Coolant Pump - Replace / Rebuild
- Draining / Changing Fuel Filter
- Drive Belt, Water Pump - Adjust / Replace
- Exhaust Water Separator Backflow Test
- Genset Engine Assembly - Replace
- Oil Filter and Fluid - Replace
- Raw Water Pickup Test
- Remote Control Panel and Connector Wiring
- Replacing the Thermostat
- Starting and Stopping the Genset
- Voltage Adjustment
Step-by-step procedures compiled from the Cummins/Onan service manual for this model.
Parts
24| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 122-0810 | Oil Filter | 1 | Oil filter | Amazon eBay $12.39 NAPA $3.59 |
| 132-0349 | Sea Water Pump Impeller kit w/cover & gasket | 1 | Impeller | Amazon eBay NAPA $29.60 FridayParts $27.99 |
| 132-0375 | Sea Water Pump Impeller kit w/cover & gasket | Impeller | Amazon eBay FridayParts $26.00 | |
| 132-0379 | Sea Water Pump Impeller | Impeller | Amazon eBay $29.95 | |
| 149-2106 | Fuel Filter | 1 | Fuel filter | Amazon eBay $34.99 NAPA $61.61 KuduParts $68.00 |
| 185-5421 | Plug, Glow | 2 | Glow plug | Amazon eBay $35.00 |
| 185-5835 | Oil Filter | 1 | Oil filter | Amazon eBay $21.78 NAPA $3.59 FridayParts $20.19 |
| 185-5990 | Glow Plug (12 Volt) | 1 | Glow plug | Amazon eBay $55.74 |
| 185-6725 | 24V Glow Plugs | 1 | Glow plug | Amazon eBay |
| 185-6934 | V-Belt | 1 | Belt | Amazon eBay $70.52 |
| 185-7268 | Glow Plug (24 Volt) | Glow plug | Amazon eBay | |
| 300-1500 | Fuel Filter | 1 | Fuel filter | Amazon |
| 323-1544 | Thermostat | 1 | Thermostat | Amazon eBay |
| 324-1491 | Oil Filter | 1 | Oil filter | Amazon eBay |
| 324-1542 | Fuel Injection Pump | 1 | Pump | Amazon eBay |
| 511-0201 | V-Belt | Belt | Amazon eBay $19.99 | |
| 612-6673 | Water Pump | 1 | Pump | Amazon eBay |
| 100-3459-01 | Engine Assy, Replacement (12V) | 1 | Service part / kit | Amazon eBay |
| 100-3459-02 | Engine Assy, Replacement (24V) | 1 | Service part / kit | Amazon eBay |
| 100-3478-02 | Cruise Kit | 2 | Service part / kit | Amazon eBay |
| 100-3478-04 | Cruise Kit | Service part / kit | Amazon eBay | |
| 130-4434 | Zinc Pencil | 1 | Service part / kit | Amazon eBay $34.17 NAPA $23.21 |
| 185-6721 | Element, Breather | 1 | Service part / kit | Amazon eBay |
| 185-7245 | Block, Cylinder | 1 | Service part / kit | Amazon eBay NAPA $234.89 |
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 — 981-0163B Cummins MDKAV - MDKAZ MDKBD - MDKBG Operator's Manual (6-2002) (Cummins/Onan)Operator's manual — eqdpartscard (Cummins/Onan)Parts manual — 981-0268 Onan MDKAV MDKAW MDKAZ Parts Manual (6-2014) (Cummins/Onan)Parts manual — NET-Onan (Cummins/Onan)Service manual — 900-0624 Onan MDKAV - MDKBN Repair Times (Cummins/Onan)Service manual — 981-0534B Onan MDKAV thru MDKAZ MDKBD thru MDKBG Service Manual (6-2002) (Cummins/Onan)Service manual — 981-0630C Onan MDKAV thru MDKBG Installation Manual (2-2004) (Cummins/Onan)
This page was generated from the 7 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.