Mine did this on my Sprite MKIII last year. Decided to do it in the middle of
our funkhana and spurted gasoline directly onto the exhaust pipe! Yikes! No
fire, but I was scared S**tless!
Anyway, check to make sure the float bowl isn't hanging up. If the float
sticks down, it doesn't shut off the fuel flow with the needle valve, and the
fuel flows out through the overflow hole just under the fuel inlet when the
pump continues to push fuel. The float should move freely, and there should be
no burrs on the float axle. If you have an original float, I would consider
replacing the floats and axles. Also, you can remove the aluminum deflector
over the overflow hole, and insert a small brass rod, to which you can attach
an overflow hose draining safely away from the exhaust pipe and onto the
ground. It's good insurance.
Curt
On Jun 28, 8:09pm, chasdoug@gte.net wrote:
> Subject: SU Carb -- Float Leaking
> The rear float of my HS2's is leaking on occasion. Actually, leaking is
> an understatement. It's pumping out significant quantities of gas --
> ooops -- petrol.
>
> If I take the lid off and fiddle with the gasket and put the lid back
> on, it seems to dry up for awhile, but it starts dumping again
> eventually. Or, if I remove the gas line and reconnect it, it sometimes
> goes away for awhile.
>
> Since I'm not really fixing anything, and since it _looks_ like the gas
> is actually coming out of the top (underneath the gas line), I'm
> starting to think there must be something else wrong.
>
> Is there some kind of overflow? What causes it to need to overflow? Or
> is my gasket technique that bad?
>
> Help?
>
> Chas Douglass -- Seattle WA
>
>-- End of excerpt from chasdoug@gte.net
--
Curtis Carlson
'66 Austin Healey Sprite MkIII ("Gerty")
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