Cummins/Onan — Out-Of-Service Protection (more than 30 days)
Maintenance · Engine
From a Cummins/Onan operator's manual covering: P216, P218, P220. Check it applies to your exact model before use.
Applies to: Cummins/Onan P216, Cummins/Onan P218, Cummins/Onan P220
Procedure
- Run the engine until it reaches normal operating temperature.
- Turn off the fuel supply and run the engine until it stops.
- Drain oil from oil base while the engine is still warm; refill with fresh crankcase oil and attach a tag stating viscosity used.
- Remove spark plugs; pour 1 ounce (2 tablespoons or 28 grams) of rust inhibitor or SAE #50 oil into the cylinders.
- Crank the engine over a few times and reinstall spark plugs.
- Service air cleaner as outlined in MAINTENANCE.
- Clean governor linkage and protect by wrapping with a clean cloth.
- Plug exhaust outlet to prevent entrance of moisture, dirt, bugs, etc.
- Wipe entire unit and coat rustable parts with a light film of grease or oil.
- Provide a suitable cover for the entire unit.
- If battery equipped, disconnect and follow standard battery storage procedure.
Specs & values
- 1 ounce (2 tablespoons or 28 grams) of rust inhibitor or SAE #50 oil
Full service-parts list: Cummins/Onan P216 →, Cummins/Onan P218 →, Cummins/Onan P220 →
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.