The Cummins/Onan NH is an engine rated at 1800 rpm, producing up to 5.5 kW. It powers generator sets from Cummins/Onan, including the Contractor.
| Rated speed | 1800 rpm |
|---|---|
| Gross power | 5 kW |
| Symptom | Remedy |
|---|---|
| Engine runs unevenly at half or full load due to faulty carburetion | 1. Start engine and allow it to warm up. 2. Push in on the governor mechanism to slow the unit down to about 400 to 500 rpm. 3. Set idle adjustment so engine runs smoothly. 4. Release governor mechanism to allow engine to accelerate. If engine accelerates evenly and without hesitation, main adjustment is correct. If not, turn needle outward about one half turn and again slow the engine down and release the mechanism. Continue until the engine accelerates evenly and without a hesitation after releasing the governor. 5. If engine tends to hunt (alternate increase and decrease of speed), open the main adjusting needle a little more. Do not open more than one half turn beyond the maximum power point. |
Fault codes and symptom→remedy steps extracted from this engine’s service/owner documentation; verify against the official manual before servicing.
The Cummins/Onan NH powers 1 generator set(s), including Cummins/Onan Contractor.