Cummins/Onan — Adjust Sisson Choke
Adjustments
From a Cummins/Onan owner's manual covering: 4.0CCK, 4.0CCK-3CR, 5.0 CCK. Check it applies to your exact model before use.
Applies to: Cummins/Onan 4.0CCK, Cummins/Onan 4.0CCK-3CR, Cummins/Onan 5.0 CCK, Cummins/Onan CCK engine
Procedure
- Insert 1/16 in. rod through shaft hole into mounting flange notch
- Loosen choke lever clamp screw
- Adjust choke lever so plate is closed or not more than 5/16 in. open
- Tighten screw and remove rod
Tools required
- 1/16 in. diameter rod Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Closed or not more than 5/16 in. open
Full service-parts list: Cummins/Onan 4.0CCK →, Cummins/Onan 4.0CCK-3CR →, Cummins/Onan 5.0 CCK →
Source: Cummins/Onan owner'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.