Quote:
Originally Posted by Hatterasguy
I beleive the lift pump will leak fuel into the crankcase if it goes bad.
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There is a tiny O-ring in a recess that seals the rod that pushes the supply pump piston. Besides this the piston runs metal to metal with no seal and if the pistion or the walls the pistion rides in gets scoured the pressure gets pushed on the tiny O-ring.