1972 Johnson 85hp Wiring Diagram

[ADK_Boater]

Hi everybody,

Does anyone have a wiring diagram for a 1972 Johnson 85 horse? I need to install a new ignition switch because there are no keys for it (bought it that way).
I did read another thread that gave a reference For "A B S C M M" for a different Johnson Motor but I wasn't quite sure if it was the same in '72.

Also, the control box that came with it is an Evinrude "Selectric" with a "black plug", and from what I've been reading here they are not exactly interchangable with the Johnson "Hydro-Electric". The throttle cable of course mates up, but am I wrong in assuming that the shift switch is not right for the Johnson. I have read that zero volts on green and blue is default forward. 12v on green = neutral. 12v on both green and blue = reverse. I was wondering if the purple wires, with and without white stripes are the crux of the incompatability? One goes to the over heat alarm I believe. One goes back to the powerhead. Or is it the something else I'm not aware of.
I would like to get a service manual for it but right now it is a little too pricey. Might have to wait a month or two.

Thanks in advance for any help you might have!

 

[ADK_Boater]

Re: 1972 Johnson 85hp Wiring Diagram

I've just read a few more threads and from what people are saying they are not interchangeable. What will a "selectric" do to a "hydro-matic"? I'm wondering if the previous owner put a hydro-electric gear switch on the selectric control box. is there a model # on the switch that I could check? I don't see one on top. I'll probably have to take the box apart to check if it does.

 

[ADK_Boater]

Re: 1972 Johnson 85hp Wiring Diagram

Bought a Clymer shop manual.

 

[Daviet]

Re: 1972 Johnson 85hp Wiring Diagram

Did the manual ansewer your questions?

 

[ADK_Boater]

Re: 1972 Johnson 85hp Wiring Diagram

Yes. Thank you Daviet. Now (unfortunately) I have many more. I can't seen to get any spark quite yet. But I am thrilled that I wired it well enough to get the starter motor to engage. I should probably start a new thread for my other questions. I'll post them here too I suppose...not sure if anybody is still watching this thread, but here goes.
What part of the ignition wiring completes the circuit for the spark plug to get spark? I did my best to follow the diagram but I could have it wrong despite my best effort.
My next move is to test that my coil is getting power. If my multi-meter reads 12v on the input positive wire, then I will assume that it is. I want to test the coil itself but my Clymer manual says that the motor needs to be running in order to do this.
I guess my next question is how do you test the coil without the motor running?
Yeah...I still have more questions so I will start new threads since they are not exactly related to a wiring diagram. I'm not quite sure of the iboats protocol.

 

[Daviet]

Re: 1972 Johnson 85hp Wiring Diagram

A new post would be best. Go to the CDI website and look at there trouble shooting section for your engine.

 

[ADK_Boater]

Re: 1972 Johnson 85hp Wiring Diagram

Disregard that part about the motor needing to be running to test the coil. I must have read it wrong because when I went back to read it again, it said to just crank the starter. Sorry about that.