ive got what seems to be a popular "12" problem, when I hit the motor start button the motor activates but turns off when you release it. the oil pressure switch has been bypassed, im noticing the drum is not fully engaged like the clutch is not activated? I do have the parts manual and schematic with no wire color relation, my dad had it running normally but he passed away with the trick to using it, now im looking to restore normal operation, anyone have experience with similar problems that might point me to the fix?