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TROUBLESHOOTING POINTS
PROBLEM CAUSE CORRECTION
Engine won’t crank. 1. 15 amp fuse blown. 1. Replace fuse.
2. Loose, corroded or defective 2. Tighten, clean or replace
battery cables as necessary.
3. Battery is discharged or defective. 3. Recharge or replace battery.
4. Defective starter contactor. 4. Replace if defective.
5. Defective starter motor. 5 Replace if defective.
6. Defective Controller circuit board 6. Replace if defective.
Engine cranks but won't start 1. Out of fuel 1. Replenish fuel.
2. Fuel shutoff valve is closed. 2. Open fuel shutoff valve.
3. Defective Controller circuit board 3. Replace if defective.
4. Spark plug defective. 4. Clean, regap or replace plug.
5. Defective ignition coil on engine 5. Replace if defective.
6. Defective carburetor 6. Replace if defective.
7. Dirty air cleaner. 7. Clean or replace elements as
needed.
8. Fuel solenoid is defective. 8. Replace or repair.
Engine starts hard, runs rough. 1. Dirty air cleaner. 1. Clean or replace elements as
needed.
2. Defective spark plug. 2. Clean, regap or replace plug.
3. Defective ignition coil. 3. Replace if defective.
Engine starts, shuts down when 1. Engine oil level is low. 1. Check oil and add oil as needed.
Start/Stop switch is released. 2. Engine is overheated. 2. Check cooling system for blockage.
3. Defective Low Oil Pressure Switch 3. Replace defective switch.
4. Defective Controller circuit board. 4. Replace defective board.
No AC output from generator. 1. Check main line circuit breaker. 1. Reset to ON or CLOSED.
2. Transfer switch (if so equipped) is set 2. Reset transfer switch.
to wrong position.
3. Failure in vehicle electrical system. 3. See vehicle manual.
4. Generator component failure. 4. Contact an authorized service
facility.
Recreational Vehicle Generator
Generac NP-50LPG Recreational Vehicle Generator
GENERAC
®
CORPORATION