Cummins/Onan Onan P4500i / P4500 — Battery Replacement
Repair & overhaul · Electrical
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
- Dispose of used battery per local regulations.
Parts for this job
- A058U961 Battery — Cummins/Onan Onan P4500i Amazon eBay $44.99
- A058U961 Battery — Cummins/Onan P4500 Amazon eBay $44.99
Part numbers from the service-parts lists for Cummins/Onan Onan P4500i, Cummins/Onan P4500. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Remove spark plug wire from spark plug.
- Loosen rubber strap holding the battery.
- Disconnect black negative cable first.
- Disconnect red positive cable second and remove battery.
- Install new battery into the frame.
- Connect red positive cable first.
- Connect black negative cable second.
- Replace rubber strap.
- Install spark plug wire.
Specs & values
- Battery: 12V, 5 Amp Hr, YT5AL
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.