wiring harness Qs

[thatguy]

hey guys..

Its been a while since I have worked on my boat, but I tore into int pretty hard lately.

Project history-

My boat is a 92 Pursuit 2150 with an I/O. The factory motor was a 4.3 V6. when I purchased the boat the engine was junk, so I pulled it with the intention on replacing it was a V8. I had a V8 for my old boat that I had never installed. The new motor is a 5.7V8 and its currently built with all merc. FWC accessories. When I first stated this project I found that the original V6 harness would not fit onto the V8. My V8 had no wiring harness. At some point I ordered from an online source V8 airing harness that would match my boat.

Question-
In my V8 harness that should fit 92 Alpha V8s there is a yellow wire with a black tracer. It is grouped with the wires at starter area and the solenoid/breaker area. What is this to?

I my original power was set up with the Thunderbolt IV ignition attached to the exhaust elbow. I do not have a V-8 ignition module, how do I select the correct one for my engine? I know that there are several options.

Thanks for the info

Tom

 

[Pete104]

Re: wiring harness Qs

That harnes is for a MEFI 3. Yellow/black connect in the harness & wakes up the ECM when cranking. It's used on 5.0L - 350 mag mpi engines of that vintage. I didn't grab serial numbers but in the stickys, merc info #15!

 

[thatguy]

Re: wiring harness Qs

ok great! that makes some sort of scene now. I am not running MEFI, The rest of the harness seems to be correct. What I will do shrink wrap off both ends and zip tie them out of the way.

Tom