wrote:

One of our pilots has suggested that fuel should not drain from the
engine when the auxiliary fuel pump is left on too long. He thinks
there is a leak in the fuel system.

Does anyone know the answer to this question?

I see this all the time on all of my local flight school C172 SPs and it is
always because someone primes the engine too long. The tube is an overflow
and it is working as designed when it is dumping fuel on the ground because
some inexperienced pilot is not following the POH's engine start method.

--
Peter


















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