Subject: Possible slow fuel leak?
> My '77 B has a problem with taking a loong time to start when it hasn't been
> driven for several days. No problems starting if it's been driven recently.
> Engine turns over fine, etc. It just acts like it's not getting any gas to
>it.
> I'm guessing that my carbs and/or fuel line lose their contents in a slow
> fashion. It's running off a Weber downdraft (DGV ?) --- any ideas on where I
> should look and what I should look for?
Next time this happens, remove the top of the Weber and take a look
at the float bowl. If it is empty, then you have slow leak in the carb
somewhere (probably the idle circuit).
Also take a look down the throat of the carb (with the throttle plates wide
open) and see if you can see any puddles of gas. I know that with the Midget
Weber manifold gas tends to puddle right underneath the carb (inside the
manifold) - but the MGB Weber manifold may be a different design.
If you have a electric fuel pump, let the pump prime the carb for a few
seconds before attempting to start the engine or try and work out where
the leak is. The float bowl on the Weber is in such an orientation that
the fuel can not flow back to the fuel tank - it can flow downstream. Try
closing the idle mixture screw all the way and check if the float bowl
is still emptying itself.
gerry
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