demon dumping fuel ???

[jbaker]

i have a new 750 mighty demon that has been giving me fits. the symtom is
rich at idle and cruise. i have done all of the usual things to resolve it,
powervalve, timing, tranfer slots, 4 corner curb idle, idle feed restrictor
size, idle air bleeds. i will say that it is much better than when i
started. jetting for wide open throttle is good, with good looking plugs.

>
> with that said, it will still soot a new set of plugs, at idle/ cruise.
> what i am finding that concerns me and makes me think the carb has some
sort of internal problem, is this......... there are two vacuum ports
> on the side of the carb. one is a timed port and the other is a direct
vacuum port. the direct one having its source below the butterflies.
specifically, the direct one will fill with raw fuel after being run a few
minutes even at idle. ( im not using either one of the ports for advance
and both are capped off )
>
> there also appears to be some puddling in the base of the intake
manifold also. im thinking the fuel is just leaking from some where and
basically finding a home in the direct vacuum port as coincidence. but is
for sure leaking from somewhere. what is interesting is that i can drive
the car, come home and remove the little cap off the direct port,
> dry the cap out and the port tube, leave it set overnite and it will be
dry the next morning.
> then start the car , run it for two minutes, shut it down, and remove
the cap off the direct port, and it is filled with fuel again. that tells
me that it is leaking when the car is running. its coming from somewhere
and making its way to the intake side of the
> butterflies.
>
> so this is more about a leak, than it is about rich idle and cruise, that
is the symptom, along
> with the raw fuel collecting in places.
>
> what are some of the areas that come to mind for you. documented or
undocumented
>
> thanks jerome baker
> kewanee, illinois
> jbaker@kresscarrier.com