Kickback from Tecumseh Engine
First of all, I'd like to say thanks to the members for all that I've learned by reading this forum. But I have a problem that I need help with.
I'm working on a friend's Scotts mower (Tecumseh engine OVRM120-22032D) which is kicking back while attempting to start it. I've replaced the flywheel key, which was slightly bent, but that didn't fix it, so perhaps the crankshaft is twisted. The blade adopter key shows no signs of damage and the blade is tight on the shaft. The mower did start up once and seemed to run okay for a short period until I deliberately killed it.
A couple of questions.
- Can anything else cause the kickback besides flywheel misregistration, a twisted crankshaft or a loose mower blade?
- Does anyone know how many degrees before TDC the spark plug should fire on this engine?
- Does anyone know where the flywheel magnet is positioned relative to the sensor coil assembly at the moment of ignition, ie, is it centrally aligned with the coil assembly?
- Are flywheel keys available that retard the spark by a certain number of degrees?
I would appreciate any help. Thanks.