1999 Mercruiser 3.0L Starter switch wiring question

JohnKorte

Seaman
Joined
Dec 30, 2013
Messages
58
Working on my boat because the wires keep falling off. Everything seems to work the way it is wired but I wanted someone to take a look at this before I start splicing to simplify this. On the I terminal of the switch is the red wire with the extra blade exposed it goes to the wiring harness which I guess goes to the starter. On the S terminal is the yellow wire with red strip that goes to the neutral safety switch. Its the B terminal that has me concerned. It has 2 purple wires one to the fuel gauge, and the other that goes to the lanyard kill switch, the red wire goes to the fuse panel. Is this wiring configuration OK?
 

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alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
42,537
Purple is 12V when key is turned to ON (I terminal)
Yellow/Red is the start circuit (S terminal)
Red/Purple comes direct from the Battery via the breaker

This is the start wiring, and note the yel/red goes thru the neutral safety switch

Start Circuit Merc.jpg

This is the power ON circuit. This pic displays how to bypass the kill switch but feeds are the same. The purple turns power on to everything, and IF there is a kill switch it is placed in between the purple wire

Kill Switch.jpg
 
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