74, 65hp Merc, no spark

[Nickledimed]

Year: 1974
HP: 65
Maker: Mercury
Serial #:4044475

Issue: I can not find a Schematic for this motor, I believe that it is a type III but I cant seen to find any wiring diagram with just the white/black, black, blue wires coming from the distributer.
I also noticed that the red and brown wires from the harness are not being used on the switch box.
So Im left standing here scratching my head.
Pictures are as follows:

Thanks for all the help.

 

[usskydvr]

Re: 74, 65hp Merc, no spark

Take a look at this link.
http://www.maxrules.com/oldmercs/Wiring/1966ona/29.pdf

 

[Nickledimed]

Re: 74, 65hp Merc, no spark

Sweet! that looks like it, thanks.
It looks like the wrong switch box is on this motor.
One red wire and one brown wire was taped up and not connected to anything.

 

[Nickledimed]

Re: 74, 65hp Merc, no spark

Nope its the correct one.
Why did Siera quit making replacements? If they ever did.
CDI wants 288 for the box and the coil...Little pricey if you ask me.
I noticed Siera sells just the box for a little over 100.00 for other 65hp.
Does anyone know were I can get a replaemment for the Part #332-4796A3
Besides CDI?
Input/Ideas are very welcome.
Thanks

 

[usskydvr]

Re: 74, 65hp Merc, no spark

As far as I know only CDI makes replacements. You can try Ebay to pick up a used one. I have done that for 6 cyl inlines.