Cummins/Onan 1B Series / 1B Series Plant — Automatic choke adjustment
Adjustments · carburetor
For the Cummins/Onan 1B Series / 1B Series Plant, from the Cummins/Onan operator's manual.
Browse Cummins/Onan generators & specs →
Before you start
- Do not lubricate the choke shaft. If dirty or oily, clean with gasoline or other suitable solvent.
Procedure
- Loosen the bimetal housing screw or the bimetal fastening screw.
- Turn the housing or fastening screw as necessary and retighten.
- If a new bimetal is installed, note original counterclockwise direction of spiral inward from fastening screw. If direction is reversed, choking action as plant warms up will be increased, causing pla
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.