Just had similiar problem and it was a leaky float; full of fuel.
I believe I've read that there is an O-ring in the bottom of the needle
valve that can leak oil out of the damper. I've seen a website somewhere
that tells how to replace it.
Monte 79B and 74 1/2 parts car
Kahoka, MO USA
----- Original Message -----
From: <RobMGB@aol.com>
To: <mgs@autox.team.net>
Sent: Wednesday, April 24, 2002 9:33 PM
Subject: Carb Problems
> 74 MGB chrome bumper with Hif4 dual carbs
> Last summer i was rearended. After some body work was done by my ex
mech/body
> shop I was getting an extreme amount of metal rust dust lookin stuff in
fuel
> filter. Had to clean every 10-20 miles as filter was full. Ended up
replacing
> tank because it had holes in top around filler nozzlewhich apparently let
in
> dust from sanding. I have had occasional carb trouble (sputtering, rough
> idle, hesitation on acceleration) off and on ever since.
> Two weeks ago it started acting like it was flooded. I barely made it home
> before I left for vacation in Hawaii. Saw 4 B's in Hawaii but none of em
> noteworthy
> Went out tonight and started car. Ran fine in quick spin around the
block.
> After pulling back in garage the idle was low. Didn't want to restart.
> Noticed gas filter was low. Turned on key and it tried to fill but seemed
to
> drain as fast as it filled. Didn't want to start and acted like it was
> flooded. Does this sound like needle valve problem?
> I took carbs off tonight and they are sitting on work bench waiting for my
> next chance to work on them.
> Also I seem to need to top off carbs with 20w50 every 2 weeks to once a
> month. This seems like a lot. Where does the oil go?
>
> RobMGB
> 74B
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