1979 Mercruiser 170/470 key start problem

Dan'l

Recruit
Joined
Jul 24, 2012
Messages
2
My 1979 I/O Marlin (170/470) will not start with the key. I believe I have traced the problem to the "neutral start switch".
The volts going into the controller from the key switch is 12 volts, but out to the starter is 4 volts.
I'm trying to confirm this is the issue before I spend money on a used/new controller as they do not make the replacement switch any more.The engine will start just fine if "hotwire" it.
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: 1979 Mercruiser 170/470 key start problem

Hook the wires to the switch and from the switch together and see if it cranks over.
 
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