I have never claimed to be good with carbs, but here are my thoughts.
It sounds like the back carb is way too rich and the front carb is way
to lean. I would think the back carb is providing almost all of the gas
for the car to run on.
As to the cause, I suppose it could be several things -jet adjustment -
float level - stuck piston as Jeff suggested - idle screws set incorrectly.
But somehow the car is running rich just off the back carb.
Roger
On 05/24/2013 07:43 PM, Mark J Bradakis wrote:
> So this isn't related to Spitfires, but close enough.
>
> You may have seen my post on Facebook about the Midget with the loose
> carbs.
> Fixed that, still having trouble.
>
> So Ricky is Mike's full time mechanic, I just get called in once in a
> while for odds
> and ends. Ricky went to tech school, learned a lot, great worker,
> smart kid. I've
> been working on LBCs longer than he's been alive. We had a minor
> disagreement
> today.
>
> So this rough running Midget with the 1275, dual SUs. Put your palm
> over mouth
> of the front carb, the idle speeds up and smooths out. Put your palm
> over the rear
> carb, engine stumbles and dies.
>
> I won't offer who said what about that indication, what do YOU think?
>
> mjb.
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