Originally Posted by AlohaMowing
The only diode on the machine seems to be the one combined with a relay and which I have already replaced. The Scag wiring diagram does show a second diode between the negative terminal of the hour meter and an unspecified point on the engine, but the parts list does not show that second diode, and I have not seen one. The Kohler wiring diagram and parts list show no diodes at all.
ALOHA....glad you got it fixed...
FYI....There are 2 diodes in the factory engine harness, 1 for start circuit,1 for run circuit. They are not listed in any diagrams....They are there....
Some newer engines only have 1 diode which is causing some other issues.