Question about Garden
When you say crankshaft stops when cylinders fire I am assuming this is during start. This is caused by a flywheel key problem (Partially sheared) A flywheel key will partially shear if there was a sudden stoppage of the engine. I e. you hit something that stopped the blades right away.
Service manual is here:
Flywheel removal is on page 44 of the file.
I am pretty sure you have a flywheel key problem as this appears to be an engine timing problem and it is firing too soon. (again partially sheared flywheel key causes timing to advance. If there is not a problem with the flywheel key the next suspect would be the mechanical compression release.
A note about flyweel key replacement. Most of them are aluminum or soft metal so that the crankshaft does not shear off with a sudden engine stoppage. Just make sure to use a Tecumseh
replacement flywheel key and not one from an auto parts store.
Thanks for chooding FixYa,
Posted on May 19, 2011
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Posted on Jan 02, 2017
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