Re: Vapor lock in a Skylane... not possible!

Vapor lock is a starving of fuel at the carb bowl while a low
pressure-high temperature area in the fuel delivery system delivers
enough vapor that the fuel pump can't get to liquid fuel. You just
don't have that situation in a gravity system.

What you may be considering vapor lock in a gravity system may be fuel
boiling in the carb bowl due to radiated heat from the exhaust system.
This causes the float to sink in the "foam fuel". The bowl then
overfills, and the excess fuel is vented from the bowl into the air
intake, flooding the engine.

The key is that all aircraft carbs vent the bowl to the air intake,
allowing a way to flood the engine. This is not very well publicized.

TriPacers probably flood the second way. Cherokees could go either
way.

Does this jibe with any observations? Comments?

.

Relevant Pages

  • Re: Starter or ignition issue??
    ... >> points thickness is smaller than original, and a replacement relay ... >> starter motor and solenoid as one unit, ... to block the fuel line when the bowl is full. ...
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  • Re: Fuel leaking from carburetor bowl
    ... engine has been shut down and allowed to sit for period of time. ... fuel level sinks down to the top of the main jets, ... bottom of the bowl. ...
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  • Re: More on Ye stalling on decelleration and nose down
    ... order to inspect the inside of the bowl to see if it has fuel in it. ... It's the really right idea, but I don't see myself pulling over to the side of the road and waiting for the engine to cool enough to pull, disassemble, inspect, re-assemble and re-install the carb while I am going about my daily stupid errands and stuff. ...
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  • Re: OT Repair of Sears lawn TRACTOR leaking gas
    ... Engines with gravity feed fuel systems receive fuel from a "bowl" under the ... As far as the engine is concerned, the bowl is the fuel tank. ... The float is there to regulate fuel level in the bowl. ...
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  • Re: Fuel leaking from carburetor bowl
    ... The fuel escapes from the float bowl after the ... engine has been shut down and allowed to sit for period of time. ...
    (rec.autos.tech)