Re: Boat doesnt shut off with key
Isn't there a separate shutdown circuit, such as a ground to the coil?
No, that is how an outboard works. With an IO, they just remove power from the ignition system.
To start isolating items, with the key in the run position and the engine off, you should have power to the + terminal of the coil (Purple Wire). With the key in the off position, you shouldn't have power to the coil. That is all there is.
If this is how it works with the engine off.
Then try it with the engine running. Turn the key off and if the engine keeps running, remove the purple wire from the ignition switch. If it keeps running, the ignition switch is not your problem. You have something in the wiring harness putting power to the coil, probably the alternator.
Look at the back of the alternator, it should have a resistor attached to the purple wire and the D+ terminal on the alternator, do you ? if not, that could be your problem.
Here is what the resistor (PN 834784) looks like.
