Cummins/Onan — Breaker Points Replacement and Adjustment

Maintenance

From a Cummins/Onan service manual — check it applies to your exact model before use.

Applies to: Cummins/Onan NHC-NHCV engine

Procedure

1. Remove spark plugs and breaker box cover.
2. Rotate crankshaft clockwise until points are fully open.
3. Remove condenser screw and detach condenser lead and coil lead screw.
4. Remove two Allen screws and lift breaker assembly from engine.
5. Replace condenser and point assembly with new parts and reinstall.
6. Rotate crankshaft clockwise until points fully open.
7. Set point gap to 0.016 inch (0.41 mm) by adjusting socket head screw.
8. Replace breaker box cover, coil wire, spark plugs, and spark plug cables.

Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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