Well Butch. He was having a problem with flooding, not varnish in the
throttle body. Address his problem, not a generic answer.

"Butch Davis" wrote in message
news
Well Bill, that's why I added that some cleaner should go into the fuel
system. But if varnish is in the float chamber/bowl it's probably in
other
parts of the carb as well. A little cleaner in the throat while running
could be useful while doing no harm whatsoever, right?

It is almost always worth trying cheap easy things before trying harder
more
expensive ones, no?

But I must agree with your comment that carb cleaner in the throat will do
nada for the float problem. Now, if only I had said that it would help
the
float chamber/bowl problem then I could even thank you for your
helpful(???)
comment.

Butch Davis
"Calif Bill" wrote in message
nk.net...
Pouring cleaner down the throat does nada for anything inside the bowls.
Rochester carbs had a foam float in some that did sink with age. Pull
the
top off, or take it to a carb shop. About $60-100 for a clean and
rebuild.
Bill

"Butch Davis" wrote in message
link.net...
Geez... run a can of carb cleaner through the darn thing. First
slowly
pour
or spray some cleaner into the throat while the engine is running at
high
idle. Don't use too much or you'll kill the engine. Next add a can
or
two
to your fuel tank. Hopefully the level in the tank is just above
empty.

You do have a filter which gets a new element every season, right?
You
also
use a good dose of Store-N-Start at the end of each season, right?

If, as seems likely, the problem is varnish in the carb the cleaner
should
solve the problem. If it is debris you'll almot certainly have to
open
the
float chamber to solve the problem. However, there is a chance that
you
can
remove the fuel line from the carb and spray some cleaner into the
float
chamber right at the float valve.

Also possible, though unusual, is a float which will no longer float
due
to
a leak. Also requires disassembly.

Try the easy stuff.... it often works. Good luck.

Butch Davis
"Rich" wrote in message
news There is no way to fix it without taking the top off. Sounds like
you
need
a new needle and seat, maybe float too.

Rich

"Bowgus" wrote in message
rs.com...
V6 3.8 litre I/O with Rochester 4 bbl

I am now confident that the problem that has been plaguing me the
past
few
seasons is a sticking fuel float ... sticking meaning not stopping
the
fuel
flow. Yesterday I started the boat up in the laneway, it would not
idle,
had
to keep the throttle open a bit to prevent stalling, shut the
engine
off,
had fuel overflow coming out both sides of the carb until the fuel
pressure
dropped (mechanical pump) ... which is basically what happened
maybe
3
times
last season (but I did not notice the fuel overflow) and which
would
eventually clear itself.

So, today as I was about to remove the carb, thought I'd try again
...
well,
it started right up, idled fine, all ok.

So here's the thing ... I do not really want to dismantle that old
Rochester
4 bbl if I can possibly avoid doing so. Has anyone had the same
problem?
Was
there an easy solution? Maybe pour in the carb cleaner and let
soak
overnight kind of thing?

Thanks.

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