Cummins/Onan — Fuel Sediment Cup Cleaning
Maintenance
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Before you start
- Gasoline is extremely flammable and explosive. Do not smoke or allow flames or sparks in the area.
- After reassembly, check for leaks and make sure area is dry before starting engine.
Procedure
- Turn fuel valve to OFF position.
- Remove sediment cup and o-ring.
- Clean sediment cup and o-ring in nonflammable or high flash point solvent.
- Reinstall o-ring and sediment cup.
- Turn fuel valve ON and check for leaks.
Source: Cummins/Onan service 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.