Have Boat Questions? Ask a Boat Repair Expert.
Remove the yellow/black wire, that is the choke the opti does not have one. Put the yellow/red wire on the S post. That is start. Place the purple on the I post.
The horn should work when the master power switch is turned on.
Have you tested for power on the engine.. Make sue that you have 12V at the starte solenoid. Then that you have 12V when the key is tuned to start
If you are getting 12V to the yellow/red wire when the key is turned to start and the starter is not working. You either have a missing ground on the solenoid, a failed solenoid or a bad starter.