Please help! Ignition turn yields loud clicking from solenoid. Replaced, same problem. Continuity good on pos, neg cables to solenoid. A few tries drains battery but on charger can repeat the issue. Shaved paint from solenoid ground issue, no progress. Fuse continuity checks. Starter replaced. Brake switch and blade switch replaced, same issue. Engine is khoeler 19hp, anything else i can try before exploring exhaust valve area?