Cummins/Onan — Checking for Fuel at Carburetor
Testing & diagnosis · Fuel system
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Before you start
- Do not permit any flame, cigarette, or other igniter near the fuel system. Gasoline is highly flammable and potentially explosive in confined spaces.
Procedure
- Look for one or more shutoff devices.
- Disconnect fuel line at carburetor.
- If fuel is present at carburetor, check ignition system or other engine malfunctions.
- Reconnect fuel line.
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.