1991 5.7 Mercruiser engine wiring diagram?

[J-Roc]

Hi all,
I'm new to this forum, but not to boating...Right now, I'm trying to get my friends boat running so he and his family can enjoy the rest of the summer out on the lake! I've tried searching the forums, but only came up with wiring diagrams for older engines. If anyone has a link or pic of the engine wiring diagram for a 91 5.7 Mercruiser w/the Thunderbolt ignition it would be greatly appreciated. Much obliged to all!

 

[Don S]

Re: 1991 5.7 Mercruiser engine wiring diagram?

Below is the wiring diagram, but if you stated what the problem is, maybe you could get some further help.
A wiring diagram isn't going to help much if you have an ignition problem.

 

[J-Roc]

Re: 1991 5.7 Mercruiser engine wiring diagram?

Don, the pic isnt showin up :/ My friend decided to rebuild his carb, and do a tune up on it- including replacing the ignition coil. Now there are a bunch of wires that I do not know where they connect to, so its imperative to find out what wires go where before he goes and fries something. Thanks for any info!!!

 

[Don S]

Re: 1991 5.7 Mercruiser engine wiring diagram?

I guess his whole site is down. So here is a different one.

 

[J-Roc]

Re: 1991 5.7 Mercruiser engine wiring diagram?

THANK YOU DON!!! 8)