Mike,
SUs? Right? Have I got the type of carb right this time?
I would suspect that the needle valve in the float chamber is not closing
off properly. Fuel level will be a little high, but whilst the engine is
running this is being pulled through the jet and into the engine, so no
apparent leaks. Probably running rich though.
Only when you shut down does fuel overflow the jet and drip off the bottom
of the carb.
Try cleaning the float needle valves, or replace with new.
Also check that the floats are both ok.
Guy
----- Original Message -----
From "Michel R. Gagne" <mgagne at unc.edu>
To: "spridget list" <spridgets@autox.team.net>
Sent: Sunday, January 04, 2004 1:21 PM
Subject: Leaky jets??
> Good Morning and Happy New Year!
>
> This morning I was going to write about how after 5 years off the road my
> Dad and I managed to finally get my 74 midge MG running, tuned to the
point
> of smoothly idling and the result of a neighborhood cruise with a sh@t
> eating grin on my face. That part was awesome!
>
> But now I have to switch topics a bit and ask why my jets are leaking???
> After rebuilding the carbs myself, and then taking them apart and
> reassembling, twice, I thought that I had finally traced the problem to
the
> rear replacement jet. I9d spent several days trying to bring the carbs
> under control. As it turns out the silver aluminum disk that connects the
> brass jet to the plastic body had a leak on the plastic side. It didn9t
> leak when the motor was running, but it didn9t run and idle well either.
My
> guess is that it was drawing air in through that hole and gushing fuel
into
> the carb. I9ll be calling APT tomorrow.
>
> Anyways when I pulled that and replaced with the old one, the leak went
> away, it tuned up as I was expecting/hoping and I was able to take my
> neighborhood cruise. When I shut off the jet bodies were bone dry and
> behaving.
>
> Well, dammit, a couple of hours later that new (old) jet had leaked as
well,
> and the forward one also (though it is mostly just wet and not dripping).
> What could be going one here? It makes no sense to me why it would start
> leaking all of a sudden. Can the system be overpressurising and pushing
> fuel above the jet level? The carbs are plumbed to the carbon canister,
> which is not plugged and is plumbed to just before a new tank where it
just
> exits to the air.
>
> I can provide more details if needed, but I9m totally flummoxed down here
in
> Chapel Hill.
>
> Mike Gagne
> Twin HS2s
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