Cummins/Onan Onan P4500i / P4500 — Cleaning the Spark Arrestor

Maintenance · Exhaust

For the Cummins/Onan Onan P4500i / P4500, from the Cummins/Onan operator's manual.

Applies to: Cummins/Onan Onan P4500i, Cummins/Onan P4500

Procedure

1. Stop inverter, let cool, move to flat surface.
2. Remove screws holding the muffler cover.
3. Loosen clamp holding spark arrestor onto muffler.
4. Slide band clamp off arrestor screen.
5. Pull spark arrestor screen off exhaust pipe.
6. Clean screen with a wire brush.
7. Replace screen if rips, tears, or large openings found.
8. Reinstall screen, band clamp, and discharge gate.

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.

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