Long story but the quick version is:
mowed with the gravely, forgot to shut off fuel valve,overflowed into carb then into portside cylinder.
pulled heads. clean up cylinders(no abrasive).replaced gaskets. torque heads. change oil and filter charge battery. start engine. drive 15 feet forward in low /low. turn off key, engine shuts off immediately. wiill not restart. pull plugs. crank by hand with socket on fan bolt/nut. hard to turn. what have I done?
2 weeks ago this was a mowing machine now its dead in the shop. tried some Kroil in cylinders to act as lube. stiil no go. hope I haven't toasted the engine.