1975 Mecury 500 wiring harness, help me find the right one.

[atistang]

**it is a 1976**

I was gifted a 1975, or maybe it is a 1976 (serial# 41419184) Mercury 500. The guy told me it runs fine, but the wiring harness is shot. I've determined that the internal and external harness is in fact toast.

Here's the problem I am having. First depending on where I look that serial number comes back as a 1975, and other resources say it is a 1976. IDK if that even matters, maybe 75 and 76 are the same. Now I am trying to figure out what part #'s I need and it is driving me nuts. I've spent countless hours going in circles and have it narrowed down to about 12 different part numbers and I am not even sure if any of them are correct.

Can anyone help me out, please? I have worn myself out mentally trying to figure out the exact parts I need. Again I need the harness that goes from the battery to the engine, then the other side of the harness that is inside the cowl.

 

[Chris1956]

The engine harness should be readily avail on the web, I would think. The boat harness is more of an issue.

On the maxrules web site, the '75 Merc 500 shows a single coil and a distributor. The '76 Merc 500 shows 4 coils, and no distributor. Which do you have?

 

[atistang]

Already you've been a big help. I can now say it is a 1976, it has 4 coils.

 

[Chris1956]

OK, punch up your motor on a site like crowleymarine and get a part number for the harnesses. Then do a web search. Surplusunlimited used to have 'em for a good price.

 

[atistang]

IDK how you did it, but within 5 minutes I have found what I need. I think my mistake was trying to find things by serial number.

Thank you for your help

 

[Chris1956]

Practice-practice-practice....smile