On Thu, 20 Jun 2013 15:43:46 -0500
dpb wrote:

snip
The problem w/ this one is that it's leaking past the
diaphragm gasket where it's not supposed to be because the top of the
tank warped (into which is also formed the base of the carb as you're
aware). You can manage to adjust it so it will run at full throttle but
can't throttle down at all or it just floods out. Trying to flatten on
diamond plate wasn't all that successful.

It seemed/seems really weird that it did that after some 30 yr being
stored the same way in the same place all those years. It was working
perfectly the last time in the previous fall and had the full-blown
symptom first start the next spring.
snip

Any chance you had some moisture/water trapped in there when you were
done last fall? Mr Frost would have his way with it... Mine spends its
off time in an unheated garage where it gets plenty hot and cold at
times.

Know what you mean about all the goings on (holes, channels, what-not)
on top of the gas tank where the carb is mounted. I like Jim's idea
with the silicone and plastic. I'll have to remember that one. Probably
will remember it too. Things like that STICK. The name of the neighbor
down the road that moved it a couple years ago is gone within
seconds... I can tell you who lived there when I was a kid though

As to the 3.5 hp, Briggs purposely limited these motors that have the
mower blade directly mounted to the crank to only 3000 rpm. So they no
longer get 3.5 hp, only 3.0 hp. At least that is what they claim in
their manual.

--
Leon Fisk
Grand Rapids MI/Zone 5b
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