Cummins/Onan — Ignition Gap Adjustment
Adjustments · Breakerless ignition
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Locate the dowel pin protruding about 3/16 inch from the surface.
- Move flywheel so the pin is adjacent to the ignition stator pin.
- Measure the gap with a feeler gauge; it should be 0.008 inch.
- Loosen mounting bolts and tap assembly up or down to adjust gap.
- Tighten bolts and recheck the gap.
Tools required
- Feeler gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 0.008 inch
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.