Wiring/Ignition problems w/ a '77 55hp evinrude

glengold

Petty Officer 1st Class
Joined
Feb 24, 2010
Messages
310
This is a case of the typical, 'turn the key and nothing happens' problem! Originally thought it was the starter solenoid, its not. I found that the ground which runs to the solenoid is bad, so that's replaced. Still nothing at the positive terminal of the starter solinoid. I then followed the wire "upstream" and tested for power at the big red plug. couldn't get the test light to 'light up' on all terminals at the big red plug while someone else was turning the key to "start". I just figured test all the terminals at the red plug bc I was unsure which one was the "start" wire. My questions are....

1- if I'm not getting power at any of the terminals on the big red plug then the ignition switch is bad, right?

2- is there any way to test the ignition switch if I pull it out?

3- anyone have a wiring diagram for the ignition switch? the motor is not original to the boat, originally it had a 97 evinrude 50hp and the mechanic that installed the '77 had to put a different switch in the console, yet he reused all of the wiring that ran from the console to the motor.

A few more details...

the tach and fuel gauge were going 'in and out' last weekend when we had it on the water. now when you turn the key to "on" nothing happens with them.

when the key is "on" and you push it in to engage the choke solenoid, it doesn't engage.
 

glengold

Petty Officer 1st Class
Joined
Feb 24, 2010
Messages
310
Re: Wiring/Ignition problems w/ a '77 55hp evinrude

figured it out, the positive wire was corroded halfway to the helm. broke in half when we were pulling the new one through.
 

oldcatamount

Lieutenant Commander
Joined
Apr 4, 2010
Messages
1,740
Re: Wiring/Ignition problems w/ a '77 55hp evinrude

Good job! That's the kind of problem that'll send you to the fridge!
 

ktrahan81

Recruit
Joined
Jun 21, 2011
Messages
3
Re: Wiring/Ignition problems w/ a '77 55hp evinrude

Hey, I need that question answered b/c I am going through the same problem. I bought a push start button and I bought a toggle switch for my electric shift. I have a 1972 50hp evinrude. If I bought a universal key switch, would that work as well. I just want to start my boat and go riding. This is my first time owning a boat.
 

Silvertip

Supreme Mariner
Joined
Sep 22, 2003
Messages
28,771
Re: Wiring/Ignition problems w/ a '77 55hp evinrude

No -- you don't have the same problem and you just hijacked another thread. Start your own please.
 
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