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My key wont turn off the motor. Replaced the Ignition switch and it still doesn't turn off. I have to pull the kill switch out in order to turn off the motor.
Any ideas where to start looking?
 

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Check the diode that comes off the field side of alternator. It can feed back through the ignition and cause this.
 

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X2 on the diode. Q? if you went into say checker and bought an auto alternator, would it also have the diode? Or is that part of what makes a marine alternator marine?
 

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X2 on the diode. Q? if you went into say checker and bought an auto alternator, would it also have the diode? Or is that part of what makes a marine alternator marine?

Not necessarily, I have had this problem in the past where the power will back feed into the wiring causing this. It is an easy fix by adding a oneway diode to the excite wire on the alt. 99% chance this is what is causing this problem.

Cy
 

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There is a similar diode fix I think for 1-wire alternators. Not sure how, but i think I have heard of such.
 

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My key wont turn off the motor. Replaced the Ignition switch and it still doesn't turn off. I have to pull the kill switch out in order to turn off the motor.
Any ideas where to start looking?
Dawg, If you are running a coil, how many wires are hooked to the positive side? If more than one I would disconnect all but the IGN power wire and try again. Then hook back up one by one and see where the back feed is coming from. M
 
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