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Intake fire on Lycoming or Continental powered aircraft
1. Stuck carburetor float.
2. Overprime. This can happen easily in carbureted aircraft engines
during cold weather starting. 3. Static electricity igniting fuel tank during
refueling.
4. Pumping the throttle on hot engine without engine turning. Lycoming and
Continental carbureted engines have the carburetor on the bottom of the engine.
When you pump the throttle you squirt a jet of fuel up into the induction pipe.
If the engine isn't also sucking air the fuel falls/drips back down into
the air box.
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