My sense is that the screen inside the tank is clogged, not allowing
fuel down the fuel line.
That, or the carb to engine gasket. BTW, it's a good idea to remove the
carb, and lightly coat the carb with Permatex IIb non hardening gasket
goop. Which is totally messy, and cleans off with drygas alcohol. Try to
get it only on the carb gasket.
Christopher A. Young
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Not exactly home repair but closely related. I have a 7-year-old
Craftsman lawn tractor with the Briggs and Stratton 24 hp 2 cylinder
engine. It's been well maintained, regular oil and filter changes and so
Saturday afternoon I cut the front grass. Sunday morning I mowed the
side and back lawns and the paths in the vineyard. Probably 20,000
square feet total for both days, no problems.
Shortly thereafter, I was mowing the weeds in the area we use for the
pumpkin patch to prepare for tilling when the engine just quit. It would
still crank and fired sporadically but wouldn't keep going. I noticed
that the fuel filter was about empty, although I'd just filled the gas
tank. I got some tools and checked things out. The gas filter was about
half full now. When I disconnected the fuel line above the pump and
cranked the engine, it pumped gas several feet with good pressure and
volume, so that was working.
I left the tractor and went on with the tilling, as the weeds weren't
high and thick enough to tangle in the tiller blades. A few hours later,
I went back to the tractor and took off the cowel over the engine to
look inside. On a whim I tried to start it and it ran fine as long as I
left the choke out. It would travel and mow without problem, but as soon
as I put the choke in, it would die. Immediately, no sputtering or
winding down, just shut right off.
Usually when something like this happens, I've found that the carb is
loose, allowing excess air through the gasket between the carb and
block, and that tightening the carb bolts solves the problem. I haven't
gotten around to that yet, ran out of day.
Any other ideas on what the problem could be? Ironically, I already have
a lot of tune up parts on order for the engine (filters, plugs, etc.)
which should arrive before next weekend.