Hello JIM.

21 Jul 04 23:40, you wrote to all:

 JH> Hello, ALL.
 JH> out, the crankcase was way overfull, and I found that gasoline had
 JH> somehow gotten into the crankcase,  fouling and greatly diluting the

 JH> I delayed checking into it, as I was getting our house here ready to

 JH> Has anyone here seen this particular problem?  I think it must be that
 JH> the carburetor float and valve assembly must have some trash in it,
 JH> and the valve isn't fully closing when the bowl is full of gas.

gasoline is thin stuff and a foreign particle on the seat of the float valve
could ccause an overflow the in carburettor then into the crankcase
breather tube or into the cylinder and then into the crankcase.

I'm suprised they didn't fit a stopcock to the outlet of the fuel tank.

as it's gravity feed a fuel filter may not be a good addition.

 JH> What I can't quite figure out is how so much gas may be getting down
 JH> into the crankcase.  It is a single banger,  vertical shaft.  Hard for
 JH> me to visualize if the gas is just dripping down thru the intake
 JH> valve and into the combustion cylinder, how _that_ much gas could be
 JH> seeping into the crankcase past the piston rings. I can't find the
 JH> engine's manual right now - - it is now somewhere out in the garage
 JH> with many other papers, files, and etc, and many of my computer
 JH> "treasures". This may be a setup where there is a rubber
tube from the
 JH> crankcase breather over to the carb.  I dunno yet, since can't really
 JH> see the carb without removing the seat and the gas tank.

There's the crankcase breather tube too, goes from the crankcase to
somwhere the in carburettor assembly opening in the carby outside of the
choke valve
(or it did in their old engines) if you tilt the moter the wrong way you
fill the air filter with oil.

With a horizontal bore I'd not be expecting much fuel to flow past the
piston, it could even be an up-hill trip to get pat the intake valve.
but as an air cooled engine it's not made to the same tight tolerances
as a water cooled one (so I'd not bet money against that scenario either)

Jasen

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