Boat Wiring

OhioRiverCigarett · 09-13-2009, 08:22 PM

I have to pull my engines this winter and I was going to repaint the engine bay and rewire. Does anyone make "kits" for twin engines. If not does anyone have suggestions on wire type, sizes, diagrams?

Thanks

c_deezy · 09-14-2009, 11:13 AM

I think CP sells harnesses. The engine wiring code is usually pretty standard, but depending on accessories the color code will be different for other things.

monstaaa · 09-14-2009, 12:50 PM

merc harneses are the best. as for color codes:
tan=temp
tanw/blue stripe=alarm-oiltemp,water temp, oil psi
black=ground
red=positive
purple=ignition
purple with red stripe(?)=trim up limit switch
grey=tach
brown=oil temp or trim
blue=oil psi
yelow=start/ crank
green w/white stripe=trim down
bluew/white stripe=trim up

OhioRiverCigarett · 09-14-2009, 06:26 PM

Where do you buy Mercury harness? Are they better than the CP harness? How much do they cost? Do they have a terminal block like the CP shows?

Thansk

Ghostrider · 09-14-2009, 07:40 PM

I'd buy the CP Harness if I had to do mine over again, they're apparently longer and the wire jackets are better. If you're doing a custom re-wire, the CP kits will allow you to route the wires where you want, I found the stock merc wiring too short to run where I needed it.
I posted a twin engine wiring diagram on here for someone a while ago from the merc manual, do a search and it should come up. Let me know if you need any specific diagrams and I'll see what I can do.

Good Luck!

Rockfish71 · 09-14-2009, 08:12 PM

Here is what you need all at the right price.

http://bpi.ebasicpower.com/c/ALL6I/I...anel+Harnesses

http://bpi.ebasicpower.com/mm5/merch...ory_Code=ALL6I

Velocity Vector · 09-14-2009, 09:00 PM

I have one new one, it is the Hardin Marine engine harness. If you need it. $90.00. Here is the link.
http://www.cpperformance.com/detail.aspx?ID=835

Audiofn · 09-15-2009, 12:11 PM

Most important thing for boat wire is make sure that you use tinned wire. It will not corrode like the plain copper wire. Even if you are in salt it will last much better.

obrien · 09-15-2009, 11:16 PM

Are you looking to rewire the boat or replace the engine harnesses? If you are rewiring, make sure you use big enough cable for the main engine power cables.

Velocity Vector · 09-16-2009, 01:57 PM

Quote:

Originally Posted by obrien

Are you looking to rewire the boat or replace the engine harnesses? If you are rewiring, make sure you use big enough cable for the main engine power cables.

And good flat braided gounds to the engine and heads do not use battery cables for grounding but flat braided gounds work best.