Cummins/Onan — Storing the Generator Set (Out-of-Service Protection)
Maintenance
From a Cummins/Onan operator's manual covering: P4500, P5000E, P5000e. Check it applies to your exact model before use.
Applies to: Cummins/Onan P4500, Cummins/Onan F7RTC engine
Before you start
- Fuel additives can cause a risk of personal injury. Read and follow manufacturer's instructions.
Procedure
- Add a fuel preservative and stabilizer to the fuel tank, or let the generator set run out of fuel.
- Shut the fuel valve and drain the carburetor bowl (Figure 7).
- Remove the spark plug and squirt one tablespoon (about 30 cm3) of clean engine oil into the spark plug hole; turn engine over several revolutions; replace spark plug.
- Pull the recoil starter handle out slowly until compression is felt.
- Change engine oil and attach a tag indicating the viscosity of oil used.
- Disconnect the cables from the starting battery, negative (–) cable first, and store the battery per the manufacturer's recommendations.
- Store the generator set in a dry, protected area.
Specs & values
- 1 tablespoon (about 30 cm3) clean engine oil
Full service-parts list: Cummins/Onan P4500 →
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.