'76 Mercury 200 (20HP) Electrical Help Needed

jimmystl

Recruit
Joined
Jul 8, 2010
Messages
3
Hi guys, new to the site but have found it very useful so far. I'm not 100% sure this will be posted in the correct place.

I just picked up '76 20HP with electric start. I started digging into it last night. It looks like I'm going to need to replace the internal wiring harness. The majority of the smaller guage wires are very brittle and some actually broke. I took tons of photos last night as a reference in case i was unable to find documentation and/or a wiring harness.

All this being said, here's my question(s):

Can someone post a wiring diagram for that motor?
Where can I order the wiring harness. I'm having a hard time finding one. Universal???

Thanks a ton for any help
 

jimmystl

Recruit
Joined
Jul 8, 2010
Messages
3
Re: '76 Mercury 200 (20HP) Electrical Help Needed

Awesome! Thanks a ton for the wiring diagram. You were correct about the harness part number. 84-74904 has now become 74904-A1. I was able to find it on Ebay for $100. Hopefully it will be in today so I can install it.
 
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