Cummins/Onan — Electric Choke Adjustment
Adjustments
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- At 70°F, choke should be approximately 1/8 inch from fully closed.
- To adjust, loosen two screws retaining choke cover to choke body.
- For less choking, turn cover assembly slightly counterclockwise.
- For more choking, turn slightly clockwise.
- Check heating element heats properly. No binding of choke shaft or thermal coil.
- Retighten lock screw after adjustment.
- Manual lever horizontal to open, vertical to choke (horizontal on manually choked plants).
Tools required
- screwdriver Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 1/8 inch from closed at 70°F
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.