Cummins/Onan Onan P4500i / P4500 — Adding Gasoline
Operation · Fuel tank
For the Cummins/Onan Onan P4500i / P4500, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan Onan P4500i, Cummins/Onan P4500
Before you start
- Never remove the fuel cap or refuel while the engine is running
- Fire and explosion hazard
Procedure
- Turn the generator off and allow the engine to cool for at least five minutes.
- Place the generator on a level surface in a well-ventilated area. DO NOT fuel indoors.
- Clean area around fuel cap and remove the cap slowly.
- Slowly add the recommended fuel. Do not overfill past the red maximum fill ring.
- Install the fuel cap. Tighten securely.
- Clean up any spilled fuel.
- Move at least 30 ft. away from refueling area before restarting the engine.
Specs & values
- Fuel: unleaded gasoline 87–93 octane
- Fuel capacity: 3.4 gallons (13 liters)
Full service-parts list: Cummins/Onan Onan P4500i →, 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.