my father in law has a mower that wont start... sometimes! it has to do with something not being grounded? he used to turn the key and then jerk his hips back and fourth as he sat on the mower it was wrong!!! when that quit working we tightend the bolts that mount the motor up and it worked like a charm for a short time. now we have pulled the motor bolts and cleaned them good replaced the nuts with silicone locknuts and it worked temporarily! Now, on a cold start sombody has to lean on the motor while sombody cranks the darn thing! but once hot it cranks right up. AAAUUUGH! anybody help????