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IO-540 sniffle valve


Well-Known Member
Mar 16, 2011
Reaction score
Does anyone know if there is a wiffle valve on the PA32 IO-540-K1G5D?
Also called a piddle valve or fuel drain valve. Lycoming p/n 75444 I believe.

It's purpose is to drain away any excess fuel in the induction system when the engine is off.

I'm trying to hunt down a possible induction leak and want to strike wiffle valve off my list of things to check.

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