Converting Ignition Switch

GoFastr

Seaman
Joined
Aug 26, 2012
Messages
73
1995 Century CC 20 footer with a Yamaha 150 outboard. Boat was basically a hand over to me and had sat on a lift for about 4 years. It's in fairly decent shape but needing some work here and there. I've alreadyt syphoned the stale fuel from the tank. Also the ignition key is missing so I was gonna replace it with another off the shelf ignition switch.

The ignition in it now is a wiring harness type switch with a sealed backing in which 7 wires come out (2 BLK, 2 YEL, 1 RED, 1 BRWN, 1 WHT). The extra wires go to the adjacent warning buzzer, separate choke switch and kill switch. Then of course there's a wiring harness main connector and a set of other single connectors. First time I've encountered a switch like this.

So anyways, was wondering if anyone has experience swapping this particular setup to a standard three pole (I, B, S) ignition switch using the existing wiring cut at the switch itself? I'm assuming the twin yellow and black wires from the back of the switch are common connections inside the sealed part and would be wired together on the standard switch. But what would go to which pole?
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Converting Ignition Switch

Guessing you have a 2 stroke, the 3 pole switch will not work with outboards. But you can get aftermarket outboard switches that will work, and they have all the different terminals on it.

ignition switch - iboats
 

GoFastr

Seaman
Joined
Aug 26, 2012
Messages
73
Re: Converting Ignition Switch

Oh okay didn't know there was a difference other than some have a push to choke ability. Anyway here's a pic of what was in there.
Ignition Harness (Custom).jpg
 

Capt Ken

Commander
Joined
Jul 30, 2002
Messages
2,270
Re: Converting Ignition Switch

Being Yamaha doesn't use BIA standard wiring colors, gonna be easy to mess up. Why not just buy the correct switch.
 

99yam40

Fleet Admiral
Joined
Sep 7, 2008
Messages
9,116
Re: Converting Ignition Switch

Take it to a Yamaha shop, it should have numbers on it to get the proper key so you can just use what is there
 
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