I had the EXACT same problem on my MGB (twin HIF's) and the Grose Jet solved
it... I assumed that the needle valve was sticking open.
Luke
'71 Spit "Fireball"
'73 MGB "Furniture" (But soon to be moved to a new garage - woohoo!)
----- Original Message -----
From: "Terry Thompson" <firespiter@yahoo.com>
To: <spitfires@autox.team.net>
Sent: Wednesday, July 25, 2001 4:06 PM
Subject: SU Carb problem
> I have a problem where in the rear carb on my spitfire
> (two SUs) floods causing fuel to choke off the engine
> as well as flow out of the over-flow tube. Where it
> then drenches the fire-wall and the frame rail under
> the overflow tube. (I can tell when it's stuck because
> the electric fuel pump starts pumping like there's no
> pressure in the line and doesn't stop even at idle
> (where there is little flow needed). It's a regulated
> fuel pump and I have a pressure gauge so I can also
> see if it's just sucking in the gas and the pressure
> is okay ~3 PSI.
>
> It only does it occasionally. (every 4th or 5th time
> that I drive it). And goes away if I pull over and tap
> on the bottom of the carb float bowl or turn off the
> car (or stall it) and turn it back on again.
>
> I installed new jets & bearings when I rebuilt the
> carb last year. But one of the floats is the original.
> The float level was set correctly when I'd pulled it
> off recently (last month I think).
> I'm going to pull it off tonight and see if
> something's been cought in the jet or if the float has
> been bent or catching on something.
>
> Anyone else experience this problem? Anything else I
> should check for or recommedations to keep it from
> continuing this? They don't make Gross jets for SU's
> do they?
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