On 17 Sep, 09:18, "Stormin Mormon"
wrote:
The last time I had one do that, the blade was loose from the crank shaft.
Flip the mower on its side, and see if the blade is tight.

The other person's suggestion about flywheel out of time, that's also very
possible.

--
.
Christopher A. Young
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."DerbyDad03" wrote in message

oups.com...
: I've got a Toro mower (Model 20016) with a 4 cycle Tecumseh engine
: that is trying to hurt me.
:
: When I try to start it, the start cable will pull out about half-way,
: under normal starting tension, and then it feels like the compression
: of the engine trys to yank it back in. It will violently pull my arm
: back towards the mower.
:
: When it eventually does start, there are 3 - 4 loud knocks (*not*
: backfires) and then the mower runs fairly normally. I say "fairly
: normally" because it no longer runs as smooth and quiet as it used
: too.
:
: The mower is at least 4 years old. Should I be looking at the fall
: sales flyers?
:

Thank you for ignoring the 3rd reply in this thread. :-)