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-   -   EFI to Carb Wiring (https://www.offshoreonly.com/forums/do-yourself-boating-budget/357711-efi-carb-wiring.html)

duplera 11-17-2018 12:20 PM

EFI to Carb Wiring
 
Apologize if this topic has been beaten to death previously.

Getting ready to remove a 502mpi from the boat and replace with a carbed 555. Will any of the current wiring harness work ? Or will a separate harness be needed with the conversion from efi to carb ?

Baja Rooster 11-17-2018 12:56 PM

You’ll just have a bunch of wires and plugs left over. It works but just unsightly. I made a bracket to mount the gizmos to the back of the engine from port side header but had a lot of left over wire that needed shortened and at that point I wish that I just gotten a carb harness from CP.

https://www.cpperformance.com/p-1323...e-harness.aspx

All you need is the water temp, oil pressure, choke, and whatever else you want to add. The ignition wire wasn’t large enough to supply my DUI ignition so I ran that wire to a relay for a heavy
gauge wire.

AllDodge 11-17-2018 03:41 PM

Agree, can use it, and disconnect the EFI part from the engine harness, or get one of these and make a custom install, sell the harness you have on the swap shop maybe

https://www.michiganmotorz.com/custo...ss-p-4508.html

BUP 11-17-2018 11:11 PM

got some of the same and cheaper priced.

Hot Rod 29 11-18-2018 10:37 AM

I was able to separate mine easily.

F-2 Speedy 11-18-2018 10:50 AM

1 Attachment(s)

Originally Posted by AllDodge (Post 4659612)
Agree, can use it, and disconnect the EFI part from the engine harness, or get one of these and make a custom install, sell the harness you have on the swap shop maybe

Attachment 576083

I've used these before, but their not complete you will need to reuse the large orange wire from the alternator to the starter battery feed, but their pretty well made.

BUP 11-18-2018 11:49 AM

if stock engine set up and drive set up -- outdrive gear lube bottle alarm as well

BUP 11-18-2018 11:51 AM

correct about the alternator wire as its a bigger gauge wire as well.


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