This got me thinking ...
The SU pumps on Healeys have a check valve on the plastic housing over
the electrics. My understanding is that this check valve allows ozone
created by arcing across the points to be exhaled (if allowed to
concentrate the points will burn even faster).
Maybe you're hearing air being pushed past a partially blocked check
valve or, as Alan suggests, escaping past the rubber or tape seal if the
valve is fully blocked. Remove the housing and verify functioning of
the check valve.
bs
Alan Seigrist wrote:
> Paul -
>
> Jokes aside from your "escaping air sound" problem....
>
> I am thinking that sometimes SU fuel pumps when rebuilt will have a
> rubber band or tape wrapped around the gap between the cap and the
> pump body. If this tape or band is forming a tight seal, you could
> have air escaping out of it from the diaphram when it starts its first
> upstroke. If this is the case I would ignore it.
>
> Check your pump and see if it has this tape/band on it.
>
> Alan
>
>
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Bob Spidell San Jose, CA bspidell@comcast.net
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