Cummins/Onan — Storing the Genset
Maintenance
From a Cummins/Onan owner's manual covering: 3.3 KY, 3.6 KY, 4.0 KY, 4KYFA26100, MicroLite 4000 Series, MicroLite 4000 Series KY. Check it applies to your exact model before use.
Applies to: Cummins/Onan 3.6 KY, Cummins/Onan 4.0 KY
Before you start
- Gasoline preservatives (stabilizers) are toxic. Follow the instructions on the container label. Avoid skin contact.
Procedure
- Gasoline models only: fill the fuel tank with fresh fuel and add a fuel preservative (OnaFresh)
- Run the genset about 10 minutes at approximately 1/2 rated power
- Turn off large loads, push the line circuit breaker OFF and stop the genset
- Remove the air filter, restart the genset and spray an engine fogger (OnaGard) into the carburetor, then stop
- Change the air filter element if it is dirty
- Change the engine oil and attach a tag indicating its oil viscosity
- Disconnect the battery cables (negative cable first) and store the battery
- Plug the exhaust tail pipe to keep out dirt, moisture and bugs
- Close the fuel supply valve (if so equipped)
Specs & values
- Store if genset will be idle for more than 120 days
Full service-parts list: Cummins/Onan 3.6 KY →, Cummins/Onan 4.0 KY →
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.