Cummins/Onan — LOOSEN THE SCREWS
For these Cummins/Onan models: 4CCK, 5CCK.
Applies to: Cummins Onan 4Cck, Cummins Onan 5Cck
Procedure
- Remove the dot button from the top of the blower hous- ing (Fig. 12),
- Connect a timing light to either plug.
Source: manual:927-0500 Onan CCK (spec A-K) Genset Service manual (06-1971).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.