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Posted by M.Paul on August 21, 2006, 11:16 am
Take out the spark plug and shine a flashlight in there while pulling the
cord to see if the valves are moving. I've seen those cheap plastic (yes,
plastic!) cam gears break in half.
> Sound advice.
> >
> >> Hi.
> >> Yesterday while I was mowing the lawn, my mower engine suddenly
> >> stopped. The blade continued to spin until it slowed to a stop. It did
> >> not strike any objects. It was working fine up to this point.
> >>
> >> When I attempt to start the mower by pulling the string, the blade will
> >> spin quietly, but I do not hear the engine try to engage. Additionally,
> >> it feels "loose" when I pull the string; previously, I could hear the
> >> engine cranking, but not anymore.
> >>
> >> I'm not very experienced with lawn mower or small engine repair, but I
> >> did some basic troubleshooting by looking at guides on the web. The
> >> flywheel key, and the blade adaptor key both seem to be intact. The gas
> >> is fresh. Oil was recently filled.
> >>
> >> My mower is a Craftsman, model 143.996504 with a 6.5 Eager-1 (Tecumseh)
> >> 4-cycle engine (917.377431).
> >>
> >> Any ideas?
> >>
> >> Thanks.
> >>
> > The other posters have some good advice, but from your description it
> > sounds possible to me that your engine has a connecting rod broken at
the
> > crankshaft end. That is based on engine spinning freely without any
> > sounds. The engine is likely beyond economical repair.
> >
> > There are some other possibilities, such as a valve being stuck open,
that
> > are easily repaired. If it spins over easily there can be no
compression.
> > I would have someone knowledgeable have a look at it if possible.
> >
> > Don Young
> >
> >
>
>
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