Cummins/Onan — Automatic choke adjustment, prior to Spec F
Adjustments
From a Cummins/Onan owner's manual covering: 10CW-150R, LOCW-150 R/, LOCW-3R/12 F. Check it applies to your exact model before use.
Applies to: Cummins/Onan 10CW-150R, Cummins/Onan Spec A, Cummins/Onan Spec B, Cummins/Onan Spec C, Cummins/Onan Spec D, Cummins/Onan Spec E, Cummins/Onan Spec F, Cummins/Onan Spec G
Before you start
- Do not turn too far; a few degrees are usually sufficient.
Procedure
- If choke does not open as engine warms up, check electric heating element.
- Loosen choke housing clamp screw.
- Turn housing slightly counterclockwise for over-choking in cold temperatures.
- Turn housing slightly clockwise to increase choking in high temperatures.
- Retighten clamp screw.
Full service-parts list: Cummins/Onan 10CW-150R →, Cummins/Onan Spec A →, Cummins/Onan Spec B →, Cummins/Onan Spec C →, Cummins/Onan Spec D →, Cummins/Onan Spec E →, Cummins/Onan Spec F →, Cummins/Onan Spec G →
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.