Facts About Generators
GeneratorsDirectoryCompareRepairEnginesControllersPartsManufacturersGuides
Search models or part #
Home›Repair guides›Cummins/Onan›Draining the Fuel Tank

Cummins/Onan P4500iDF — Draining the Fuel Tank

Maintenance

For the Cummins/Onan P4500iDF, from the Cummins/Onan owner's manual.

Applies to: Cummins/Onan P4500iDF

Before you start

  • DO NOT use an electric pump.

Procedure

  1. Unscrew the fuel tank cap and remove the fuel screen filter.
  2. Siphon gasoline from the fuel tank into an approved gasoline container.
  3. Reinstall the fuel screen filter and the fuel tank cap.
  4. Start the generator and allow it to run until the engine stops.
  5. Push the battery switch to the OFF position.
  6. Disconnect the battery quick-connect plug.
  7. Remove the spark plug.
  8. Put a teaspoon of engine oil into the cylinder and pull the recoil handle until resistance is felt.
  9. Reinstall the spark plug; leave the spark plug boot disconnected.
  10. Install the engine service cover.

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

Full service-parts list: Cummins/Onan P4500iDF →

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.

More Cummins/Onan repair guides →