71 s2a - webber carb question & float height

I'm having problems getting a project car to run right. It starts & runs
okay on the choke but after a couple of minutes, it suddenly runs real rough
and then dies. During this two minutes I'm backing off the choke trying to
avoid an over rich mixture. The plugs are pretty black indicating too rich.
Seems no matter what tune I play with the choke it will dies after this
couple of minutes. I've had the top off the carb and blown thru all the
jets - nothing abnormal looking. Compression is good as is timing.

One question I do have though concerns float height measurement. I got a
figure of 7mm from a web site somewhere but no indication of what should be
measured.

Steve

I had the same on my 2,25 with Weber 34ict. Had to strip carb completely
and blow out all passages and jets with air. No more problems. Never
played with float levels but I do have the problem of fuel boiling out of
the bowl when engine shut down under very hot engine operations.
Good luck.
James
Cape Town

steve d <[email protected]> wrote in message
news:[email protected]...
> I'm having problems getting a project car to run right. It starts & runs
> okay on the choke but after a couple of minutes, it suddenly runs real
rough
> and then dies. During this two minutes I'm backing off the choke trying
to
> avoid an over rich mixture. The plugs are pretty black indicating too
rich.
> Seems no matter what tune I play with the choke it will dies after this
> couple of minutes. I've had the top off the carb and blown thru all the
> jets - nothing abnormal looking. Compression is good as is timing.
>
> One question I do have though concerns float height measurement. I got a
> figure of 7mm from a web site somewhere but no indication of what should
be
> measured.
>
> Steve
>
>