Cummins/Onan — Breaker Point Gap Adjustment
Adjustments · ignition
From a Cummins/Onan operator's manual covering: 305CCK, 4CCK, 5CCK. Check it applies to your exact model before use.
Applies to: Cummins/Onan CCK engine
Procedure
- Crank engine to fully open breaker points (1/4 turn after top center).
- Loosen and move stationary contact to correct gap.
- Set breaker point gap at 0.020 in.
- Secure points and check for correct gap.
Tools required
- thickness gage Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Gap points at 0.020 in
Source: Cummins/Onan operator's 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.