HomeCummins/OnanCummins/Onan NHE

Cummins/Onan NHE Generator Set

The Cummins/Onan NHE is a 4 kW (115.9 kVA) Gasoline, Propane standby generator set. It is available at 120 V and 240 V, single-phase-phase, 50 Hz and rated 54.2 A. It holds about 3.5 L (0.9 gal) of oil and 0.4 L (0.1 gal) of coolant. Starting uses 360 batteries rated 360 CCA at 12 V. The set measures 635×478×356 mm (25.0×18.8×14.0 in), weighs about 97.9 kg (216 lb) and produces 1800 dBA.

4 kW
Standby
3.5 L
Oil capacity
4
Document types

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

Specifications

FuelGasoline, Propane
Frequency50.0 Hz
Standby power4 kW
ControllerElectronically Regulated
Oil capacity3.5 L
AlternatorCummins/Onan four-pole
Voltage options120 V, 240 V
Phase1-Phase
Rated current54.2 A
Circuit breaker[120, 124] A
Battery cranking360 CCA
Battery voltage12 V
Battery quantity360
Coolant capacity[{'value': 0.4, 'unit': 'gal/hr'}, {'value': 1.5, 'unit': 'Uhr'}] L
Dimensions (L×W×H)635×478×356 mm
Dry weight97 kg
Sound level1800.0 dBA
Tank runtime[{'value': 0.4, 'unit': 'gal/hr'}, {'value': 0.7, 'unit': 'gal/hr'}, {'value': 1.3, 'unit': 'gal/hr'}] hr

Maintenance & consumables

ItemSpecCapacityPart #Interval
Air filter500 hr find
Fuel filter1000 hr find
Oil filter1000 hr find
Belt500 hr find
Coolant1000 hr
Coolant filter find
Hydraulic filter find
Oil3.5 l50 hr

Common questions

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

The Cummins/Onan NHE is rated 4 kW standby.

What fuel does the Cummins/Onan NHE use?

The Cummins/Onan NHE runs on Gasoline, Propane.

What alternator does the Cummins/Onan NHE use?

The Cummins/Onan NHE uses a Cummins/Onan four-pole alternator.

Troubleshooting

20

Symptoms & remedies

SymptomCauseRemedy
Disconnecting Set from RV Systems1. First disconnect the negative (-) battery cable from the baitery and then disconnect the battery cables from the genset. 2. Disconnect the remote control wiring harness connector at the genset. 3. Disconnect the generator output wiring and conduit from the power distribution panel or box on the vehicle. Tag all wires to make reconnections easier. 4. Disconnect the exhaust tailpipe from the outlet of the muffler and then remove the muffler. See EXHAUST SYSTEM under Engine Subsystems. 5. Disconnect the fuel line from the genset. Follow the applicable instructions depending on the fuel.
FAILS TO CRANK1. Low battery 2. Bad battery connection 3. Blown fuse.
CRANKS SLOWLY1. Low battery.1. Check battery electrolyte level. 2. Clean and tighten all battery and cable connections.
CRANKS BUT WON’T START1. Fuel below genset pick-up level 2. Fuel supply shutoff valve closed. 3. Carbon deposits on spark plugs. 4. Blown fuel pump/in tank.1. Add fuel. 2. Fully open fuel supply valve. 3. Remove spark plugs and clean. 4. Replace fuse with same type and rating. If problem persists, see Onan service center.
EXHAUSTING BLACK SMOKE1. Rich fuel mixture. 2. Dirty air filter. 3. Choke stuck.1. Turn main fuel adjustment in 1/8 turn (location of adjustment is shown in Figure 3-1). 2. Replace air filter. 3. Contact an Onan service center.
UNIT RUNS THEN STOPS1. Out of fuel. 2. Low oil level. 3. Excess oil.1. Refill fuel tank. 2. Add oil if necessary. 3. Reduce engine oil level.
UNIT RUNS BUT SURGES1. Loose or worn spark plug leads at spark plugs and ignition coil. 2. Ignition coil, wiring, or control components defective. 3. Faulty spark plugs. 4. Governor out of adjustment.1. Check security of spark plug leads at spark plugs and ignition coil. Replace leads if worn. 2. Contact an Onan representative. 3. Remove and clean or replace faulty spark plugs. 4. Contact an Onan service center.
The engine fails to crank.A. Try starting at the genset rather than at the remote control. b. Replace fuse F1 on the control panel if it has blown. c. Clean and tighten the positive (+) and negative (- ) battery cable connections at the battery and the genset. d. Recharge the battery. Refer to the battery manufacturer’s recommendations.
The engine cranks slowly.A. Disconnect the air conditioner and other large loads. b. Clean and tighten the positive (+) and negative (- ) battery cable connections at the battery and the genset. c. Recharge the battery. Refer to the battery manufacturer’s recommendations. d. Change the engine oil to oil having the proper viscosity for the ambient temperature. See Table 1.
The engine cranks but fails to start.A. Check the fuel tank and fill if necessary. b. Open any closed fuel shut off valve. c. Check engine oil level and add oil as necessary. d. Replace fuse F2 (side of control panel) if it has blown. e. Service the air cleaner. f. Secure the spark plug leads on the spark plugs. g. Replace the spark plugs.
The engine runs and then stops or surges.A. Check the fuel tank and fill if necessary. b. Check the engine oil level and add oil as necessary. Drain excess oil if the level is above the dipstick Full mark. c. Check and reset the carburetor preheater lever and altitude adjust knob. See Varying Operating Conditions. (Gasoline models only.) d. Secure the spark plug leads on the spark plugs. e. Replace the spark plugs.
The genset keeps stalling or the circuit breaker keeps tripping.A. Try running with fewer appliances connected. See Powering Equipment. b. Check the fuel tank (LPG, vapor-withdrawal models) and fill as necessary. On cold days the LPG container may have to be kept at least half full to provide the rate of vaporization necessary to keep up with the genset fuel demand.
There is no electrical power even though the genset runs.A. Reset tripped circuit breakers. See Powering Equipment. b. Unless there is an automatic power transfer switch, plug the vehicle power cord into the genset power output receptacle (if so equipped) or turn the vehicle power selector switch to its genset position (if so equipped).
The remote battery condition meter indicates low voltage.A. Clean and tighten the positive (+) and negative (- ) battery cable connections at the battery and the genset. b. Recharge the battery. Refer to the battery manufacturer’s recommendations.
Black smoke exits the tailpipe.Service the air cleaner.
Eng Cranks But Will Not Start (Genset)-01 Check: - Spark plugs - Ignition coil - Ignition module -02 Perform checks in step 01
Engine Overfueling (Genset)-01 Check: - Spark plugs - Fuel pressure at carburetor - Vacuum pull−off - Electric choke heater -02 Perform checks in step 01 - Check: - Governor adjustments - Carburetor adjustments -03 Perform checks in step 02 - Check: - Ignition coil - Ignition module
Engine Unstable (Hunts) (Genset)-01 Check: - Fuel supply - Fuel Lines for leakage - Loose wire connection -02 Perform checks in step 01 - Check: - Governor linkage for binding - Governor adjustments - Carburetor adjustments
Engine Will Not Crank (Genset)-01 Check: - Low battery voltage - Terminal connection−loose or dirty - Battery cable size - Starter drive engagement -02 Perform checks in step 01 - Check: - Remote control - Connections on PCB control board - Start solenoid - Starter
High/Low AC Output (Genset)-01 Check: - Broken or loose wires - Voltage regulator - Transformer regulator - Engine speed - Voltage ad

Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.

Parts

14
Part #DescriptionQtySystem
940-0618F Battery1Battery PartsGeek
940-0628OE-125 Spark Plug1Spark plug PartsGeek
940-0636V-belt, 1.5 inches wide1Belt PartsGeek
940-0637OE-103 Coolant1Coolant PartsGeek
940-0638OE-100 Oil Filter1Oil filter PartsGeek
940-0639OE-107 Fuel Filter1Fuel filter PartsGeek
940-0640OE-108 Air Filter1Air filter PartsGeek
965-0248BATTERY1Battery PartsGeek
965-0373SPARK PLUG1Spark plug PartsGeek
M-1604-9Spark Plug (Gasoline)1Spark plug PartsGeek
323-1486SocketsService part / kit PartsGeek
323-1487-04Onan 16-Socket ConnectorService part / kit PartsGeek
M-1600-3PLACE FLOOR TRAY UNDER DRIP TRAY REINFORCEMENT RIBSService part / kit PartsGeek
M-1604-14Governor Adjustment1Service 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

RatingLoadL/hgal/h
Prime1.20.3
Standby1.20.3
Standby1.10.3
Standby50%1.90.5
Standby100%3.00.8

Available documents

Operator's manual — 965-0176 Onan BGE NHE RV Genset Operator's manual (07-1997) (Cummins/Onan)Parts manual — DK-Kohler (Cummins/Onan)Service manual — 900-0603 Onan BGE NHE Repair Times (Cummins/Onan)Service manual — 965-0528 Onan BGE (spec F-K) NHE (spec E-K) Emerald Plus series RV Genset Service Manual (09-1994) (Cummins/Onan)Service manual — 965-0528 Onan BGE (spec F-K) NHE (spec E-K) Genset Service manual (09-1994) 965-1060 Supplement (spec M) (11-1995) (Cummins/Onan)spec_sheet — 965-0628 Onan BGE NHE Emerald Plus series RV Genset Installation manual (10-1996) (Cummins/Onan)