Perhaps the gas is getting into the crankcase and carbs via the
vacuum hose from the pet cock to the carb boot (the vacuum line that
opens the petcock when the engine is turning over). Either way it is
getting into the crankcase through the petcock. left in the on
position seems to me to tell you that it is still drainingthrough
that port. perhaps vacuum is being created enough to allow it but
only when when everything is on the bike. The gurgling is probably
the gas leaked into the cylinders and or into the crankcase. I had a
Suzuki GS550L: that did the same thing. All the gas drained from the
tank in to the crankcase via the pet cock even though the pet cock
showed no leaking off the bike. I put an inline shut off valve in and
that solved the problem -until I forget to turn it on.
On Apr 20, 2010, at 8:45 AM, Dale wrote:
wow...im not sure i've ever said this with an engine (at least not
that I'd admit in public)...I'm Stumped...I hope someone has an answer
because i certainly would like to hear it...i would have gone directly
to A) fuel shut off valve B) needle and jet, and C) float level. The
float level set too high will let fuel continue into the bowl, but
without the vacuum of the engine turning over, the shutoff valve would
cover that symptom...have you drained the bowl and then left the
drains open to catch fuel over a period of time? A little fuel can
sometimes seem like quite a bit...unless you are stuck on the side of
the road...I am very curious about the bubbling...
Good Luck!
"E"
On Apr 20, 4:18 pm, JP <[email protected]> wrote:
Howdy folks,
Once again I am back to lean on the technical expertise of the
board..
I have an issue with the crankcase flooding with fuel if the petcock
is left 'ON'. Now I am completely baffled as to why this happens,
because:
1) With the tank disconnected, NO fuel comes out in any setting
(good,
vacuum fuel control is holding up.)
2) Floats & needles are pretty much pristine, like new. No damage
whatsoever
Soooo.. how the heck is gas getting into the carbs and then flooding
the engine!? It's also managing to pour back into the airbox (yikes.)
Just for the sake of it I pulled the carbs completely apart,
diaphragm
housings included, no damage there either though there was a small
amount of gunk/rust under the diaphragm rubber seals so I cleaned
that
out completely.
One odd symptom - when I pushed the starter once on a cold night, I
heard a strange 'bubbling' noise.
Any ideas?
Cheers!
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