Cummins/Onan — Fuel Solenoid Check
Testing & diagnosis · Fuel shutoff solenoid K7
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKAD, Cummins/Onan MDKAE, Cummins/Onan MDKAF
Procedure
- If fuel to injection pump but no fuel at injection nozzle, fuel shutoff solenoid K7 may be defective.
- Watch for solenoid actuation when B+ applied (start switch in start or run position).
- Measure voltage at solenoid to confirm start circuit working.
- If no actuation when B+ applied, fuel solenoid must be adjusted or replaced. When B+ removed, solenoid must de-activate.
Full service-parts list: Cummins/Onan MDKAD →, Cummins/Onan MDKAE →, Cummins/Onan MDKAF →
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.