by Skywatcher » Mon Sep 16, 2019 12:04 am
Hi Buffalo
Working on a 1994 Sears lawn mower with a Tecumseh TVS120-63922K-4059A engine. The engine has compression, spark and fuel but would not start except for the occasional cough out the muffler, so suspected ignition timing out due to a sheared flywheel key. Sure enough, the flywheel had rotated almost 90ยบ on the crankshaft. The older Tecumseh engines with the stepped flywheel key used an aluminum key and 30 foot pounds torque on the flywheel nut. Tecumseh changed to a zinc key around 2002 and increased flywheel nut torque to 40 foot pounds as the keys were shearing if the mower just hit a tuft of tough grass, yet alone a rock or tree stump. All the best,
Sky
A person who sees Quality and feels it as he works is a person who cares.
A person who cares about what he sees and does is a person who's bound to have some characteristics of Quality.
Robert M. Pirsig. (Zen and the Art of Motorcycle Maintenance)