Been in the exact same position recently. My father has a tiller with a
B&S 3.5 that we could not get to run. It had been difficult to start for a
few years but got to the point last year where it wouldn't start at all.
There was a problem with crud shorting out the ignition kill contacts a
few years ago but it had plenty of spark when I decided to have another go
at it last month.

Tried carb cleaner, tried cleaning the fuel pickup, tried tightening up
the connections from the crankcase to the fuel pump, tried cleaning all
the crud out of the fuel pump- nothing. It would run for a few seconds on
quick start but that was all.

Finally I took the jet out of the side, seemed clean but I ran a wire
through it just for fun.

Then I shot compressed air into the jet passage just for luck & put it
back togeather.

Started on the first pull.

Tweaked the idle adjust a little & it runs like new .



Treefrog ) wrote: : Wayne,

: Noted your post B&S engines and I'm in a similar situation. Bought an
: edger at a garage sale, had corrosion in the fuel tank from sitting too
: long without being used. I cleaned out the carb, replaced the fuel pick up
: and diaphram but it still won't run and I can't find any more jets to
: clean!

: Noted your comments about the fuel tank (I have the small tank - 1 qt)
: having the duel level and bowl inside the tank. The bowl is there but
: corroded. I can't see any fuel pickup that would fit in there so I wasn't
: sure of how it worked. Am I missing something? I'm guessing I need a new
: fuel tank.

: I'll strip out the carb again and maybe take photo's - there's a steel pin
: (?) about 1" long that I don't understand, it's not listed in the part
: list. And what's a "welch plug" p/n 223472 - are the main jet's in there?

: Thanks for any assistance.

: M - Houston, TX


:
: My dad bought a sprayer with a 3.5 horse engine at an auction. I have
: been trying to get it to start. I can make it run for a few seconds by
: spraying starting fluid down the throat of the carborator. I took the
: carb off, it has a plastic tube with a filter on it going into the
: tank. I cleaned this tube and sprayed cleaner through the carborator.
: It did not help it to start. I have put a new spark plug on it also.
: Is there an adjustment on the carborator I can make?
:
: Any help would be greatly appreciated!

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