Cummins/Onan — Breaker Points - Timing (Replacement and Gap Adjustment)

Adjustments

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

Applies to: Cummins/Onan NHP / NHPV engine

Procedure

1. Remove spark plugs and rotate flywheel TC mark to 25 degrees BTC, then 90 degrees clockwise.
2. Remove breaker box cover and unplug coil wire at coil (+) terminal.
3. Remove condenser (screw A) and detach condenser and coil leads (screw B).
4. Remove two Allen screws (C) and lift breaker assembly from engine.
5. Replace condenser and point assembly and reinstall in reverse order.
6. Adjust point gap at .019 inch (0.48 mm) using a clean flat thickness gauge.
7. Replace breaker box cover and spark plugs.

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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