HomeCummins/OnanCummins/Onan MDKAL

Cummins/Onan MDKAL Generator Set

The Cummins/Onan MDKAL is a 8 kW (8 kVA) Diesel standby generator set powered by a Cummins/Onan SKB719U6D2RA engine. It is available at 12 V, 1-phase and 50 Hz. It holds about 4 L (1.1 gal) of oil and 4 L (1.1 gal) of coolant. Starting uses battery rated 360 CCA at 12 V. The set measures 826×479×562 mm (32.5×18.9×22.1 in) and weighs about 245 kg (540 lb).

8 kW
Standby
0.719 L
Displacement
4.0 L
Oil capacity
3
Document types

How to read your Cummins/Onan serial & model number →

Compare with other 5–10 kW Diesel generators →

Specifications

FuelDiesel
Frequency50.0 Hz
Standby power8 kW
Standby kVA8
Emissions1995-1998 California
ControllerDC
Oil capacity4.0 L
AlternatorCummins/Onan DC (Battery Charging) Alternator
Voltage options12 V
Phase1-Ph
Power factor1.0
Battery cranking360 CCA
Battery voltage12 V
Coolant capacity4.0 L
Dimensions (L×W×H)826×479×562 mm
Dry weight238 kg

Engine

Cummins/Onan SKB719U6D2RA
Displacement0.719 L

Maintenance & consumables

for the Cummins/Onan SKB719U6D2RA
ItemSpecCapacityPart #Interval
Air filter find
Fuel filter find
Oil filter find
Belt find
Coolant8760 hr
Coolant filter find
Oil35 hr

Common questions

What is the power rating of the Cummins/Onan MDKAL?

The Cummins/Onan MDKAL is rated 8 kW standby (8.0 kVA).

What engine does the Cummins/Onan MDKAL use?

The Cummins/Onan MDKAL is powered by the Cummins/Onan SKB719U6D2RA engine.

What fuel does the Cummins/Onan MDKAL use?

The Cummins/Onan MDKAL runs on Diesel.

What alternator does the Cummins/Onan MDKAL use?

The Cummins/Onan MDKAL uses a Cummins/Onan DC (Battery Charging) Alternator alternator.

Troubleshooting

9

Fault codes

CodeMeaning
Check Engine‘Check Engine’ Fault Shutdown

Symptoms & remedies

SymptomCauseRemedy
Fault Circuit Breaker CB2 tripsAC over-voltage, overspeed, high exhaust temperature, high coolant temperature, low oil pressure, and low coolant level (optional)
Engine does not stop runningMalfunctioning fuel solenoid or linkagePull 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 PANELEmergency Stop Switch OFF; "Check Generator" or "Check Engine" Fault; Faulty remote circuitPush 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 PANELEmergency Stop Switch OFF; "Check Generator" or "Check Engine" Fault; Cranking voltage too lowPush 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 STARTEngine not getting fuel; Blocked air inlet; Low engine temperature; Cranking voltage too lowA. 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 SHUTDOWNLow engine oil pressure; High engine temperature; High exhaust temperatureCheck 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 SHUTDOWNGenerator overloadRun with less load.
NO OUTPUT VOLTAGEA 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

1

Step-by-step procedures compiled from the Cummins/Onan service manual for this model.

Parts

17
Part #DescriptionQtySystem
132-0375Sea Water Pump Impeller kit w/cover & gasketImpeller buy
132-0379Sea Water Pump ImpellerImpeller buy
149-2106Fuel Filter Element1Fuel filter Amazon eBay $36.99
185-5421Plug, Glow4Glow plug Amazon eBay
185-5835Filter, Oil1Oil filter Amazon eBay $21.32
185-6721Breather Filter Element1Air filter buy
185-6934Water Pump Belt1Belt Amazon eBay $39.00
185-7268Glow Plug (24 Volt)Glow plug buy
300-1500Fuel Filter1Fuel filter eBay
323-1544Thermostat1Thermostat buy
324-1491Oil Filter1Oil filter eBay
324-1542Fuel Injection Pump1Pump buy
612-6673Water Pump1Pump buy
M1679-2TWO F U E L LINES IN TANK FITTINGFuel line buy
100-3478-02Cruise Kit2Service part / kit buy
130-4434Zinc Pencil1Service part / kit eBay $32.94
CS1312-1CROSS-SECTION VIEW HULL STRAINER SEA COCK RECOMMENDED WATER STRAINER OR FILTER FLUSH THROUGH-HULL FITTING TO GENSETService 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

RatingLoadL/hgal/h
Prime
Standby
Standby50%1.90.5
Standby100%3.00.8

Available documents

Operator's manual — 981-0103B Onan MDKAL MDKAA MDKAB Operator's Manual (1-1998) (Cummins/Onan)Parts manual — 981-0261 Onan MDKAL Spec A-C Parts Manual (12-2012) (Cummins/Onan)Parts manual — 981-0261C Onan MDKAL Spec A-B 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)Service manual — 981-0614 Onan MDKAL Operator's Manual (3-1997)