Service parts for the NH RV
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredOil system
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
| Voltage options | 120 V, 249 V, 120/240 V |
|---|---|
| Phase | single-phase |
Maintenance & consumables
| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air filter | 140-0495 | Amazon eBay $16.99 NAPA $29.20 | ||
| Fuel filter | — | 100 hr | |||
| Oil filter | Oil filter | 122-0800 | Amazon eBay $31.23 FridayParts $39.99 | ||
| Battery | — | 100 hr | |||
| Belt | — | ||||
| Coolant | — | ||||
| Oil | 3.25 liters | — | 100 hr | ||
| Spark plug | — | 100 hr |
Common questions
What voltages is the Cummins/Onan NH RV available in?
The Cummins/Onan NH RV is offered in 120 V, 249 V, 120/240 V, single-phase-phase.
Which oil filter part number does the Cummins/Onan NH RV take?
The Cummins/Onan NH RV uses oil filter part number 122-0800.
What air filter fits the Cummins/Onan NH RV?
The Cummins/Onan NH RV uses air filter part number 140-0495.
Troubleshooting
11Fault codes
| Code | Meaning | Cause | Remedy |
|---|---|---|---|
| F2 | Cranks but won't start — Blown fuse (F2) | Blown fuse (F2) | Replace fuse (F2) on control. |
| K2 | Cranks but won't start — Faulty crank ignition relay (K2) | Faulty crank ignition relay (K2) | Check voltage from relay terminal "4" to ground while cranking unit. Battery voltage should appear at this terminal. If not, check for voltage at relay terminals "1" and "2". If battery voltage is present at terminals 1 and 2, but not at 4, replace relay. If no voltage appears at terminals 1 and 2 on relay while cranking, check wiring between start solenoid (K1) and crank ignition relay (K2). |
Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Fails to crank | Bad battery connection | Clean and tighten all battery and cable connections. |
| Fails to crank | Low battery | Check specific gravity. Recharge or replace battery if necessary. |
| Fails to crank | Low battery — reverse current diode (CR1) may be shorted or open causing a drain on the battery; R2 may be open | Check specific gravity. Recharge or replace battery if necessary. |
| Fails to crank | Faulty start solenoid (K1) | Check for battery voltage at K1 "I" terminal; push start switch, check start solenoid "S" terminal voltage to ground; when battery voltage at start solenoid "B" terminal is present, battery voltage should also appear at "S" terminal; if not, replace start solenoid. |
| Fails to crank | Faulty start switch | Jumper switch (#3 terminal) to ground. If solenoid energizes, replace start switch. |
| Cranks slowly | Bad battery connection | See 1 above (FAILS TO CRANK): Clean and tighten all battery and cable connections. |
| Cranks slowly | Low battery | See 2 above (FAILS TO CRANK): Check specific gravity. Recharge or replace battery if necessary. |
| Cranks but won't start | Faulty ignition | Check to see if points open and close during cranking. If they do not open and close, adjust and set points. Plug and plug wires must be in good condition. Voltage at ignition coil negative terminal (-) must alternate from +12 volts to zero volts as points open and close during engine cranking. |
| Cranks but won't start | Inoperative choke | With engine not running, check choke vane movement by pushing choke lever arm. Choke must be in closed position with cold engine, and must be free to move against bimetal spring. As engine warms up, bi-metal spring relaxes and allows choke vane to open fully. The lever will pulsate as engine warms up. See ADJUSTMENT section. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing.
Parts
12| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 122-0800 | Oil filter | 1 | Oil filter | Amazon eBay $31.23 FridayParts $39.99 |
| 140-0495 | Element, Air Cleaner | 1 | Air filter | Amazon eBay $16.99 NAPA $29.20 |
| 140-1673 | Carburetor air preheater kit | Carburetor air preheater kit | Amazon eBay | |
| 149-1353G | Air Filter | Air filter | Amazon eBay | |
| 167-0241 | Plug, Spark - Non-Resistor Type | 2 | Spark plug | Amazon Amazon eBay $34.86 eBay $17.97 |
| 167-0241D | Spark Plug | Spark plug | Amazon eBay | |
| 167-0247 | Spark Plug | 2 | Spark plug | Amazon eBay $5.00 |
| 160-0002 | Point Set, Breaker | 1 | Service part / kit | Amazon eBay $19.99 NAPA $28.64 |
| 160-1328-01 | Tune-up kit | Service part / kit | eBay | |
| 167-1616-01 | Plug wire | Service part / kit | eBay $60.00 | |
| 300-0985 | Control Assembly, Remote (Includes Parts Marked +) | 1 | Service part / kit | Amazon eBay |
| 300-0986 | Control Assembly, Deluxe Remote (Includes Parts Marked *) | 1 | Service part / kit | Amazon eBay $150.00 |
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 |
|---|---|---|---|
| Prime | 100% | 18.62 | 4.92 |
Available documents
Parts manual — F-1061 Cummins-Onan RV Green Label Parts (Filter & Tune-Up) Reference Guide (02-2010) (Cummins/Onan)Service manual — 940-0121 Onan 6.5KW NH (spec P) Operator's manual (10-1981)
This page was generated from the 2 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.