Complete newbie needs help

[Robsaun]

Acquired an old bass boat with a mid 70’s evinrude 115 on it and another Johnson 90 sitting inside of it. Messed with it today and got 115 turning over with great compression even on a weak starter. Originally had spark on 2 port cylinders but not on starboard cylinders. Then lost all spark. I’ve read to disconnect the main plug and check to see if there is spark. I plan on doing that tomorrow.

In the meantime I’ve found some broken and disconnected wires that I don’t know where they go to. Gonna try and upload some pics and hopefully someone can help me out

 

[Robsaun]

In pic 1 you can see there is a cut wire coming off of that block… on pic 2 if you look there is a brown wire with a clip on the end of it right next to the red plug… no clue where it goes.

 

[racerone]

Install a factory solenoid.-----Starter must spin the flywheel fast to generate the spark.-----The loose foam ( mice ? ) bits must be dealt with.

 

[Crosbyman]

see typical "mid 70s V4 wiring"

https://maxrules.com/graphics/omc/wiring/V4_1973.jpg

are you a newbie to wiring and VOM testing ?

 

[Robsaun]

see typical "mid 70s V4 wiring"

https://maxrules.com/graphics/omc/wiring/V4_1973.jpg

are you a newbie to wiring and VOM testing ?

Somewhat. I’ve wired several Harley’s and done a bit of jet ski wiring and repair. Really don’t know much about outboards.

 

[Crosbyman]

works like a harley but no wheels other than a prop..
fuel carb ignition.

 

[racerone]

Find a wiring diagram on line.----maxrules---or a few other places.

 

[racerone]

I believe that site has the exact wiring diagram for your motor.----But do a complete evaluation on this motor BEFORE spending beer tokens on it.-----And --"great compression " -- means nothing to me.----Post the actual / accurate values.

 

[Robsaun]

117, 114, 121, and 118 with a weak starter. Gonna swap starter off of my other 115 and take new compression numbers

 

[Tassie 1]

Don't be surprised if your 50'ish year old motor...with no previous known history... does not produce ' better ' compression figures though.

And l like older outboards...coz they are like me...simple!

 

[racerone]

Very easy to remove the 4 bypass covers to inspect pistons / rings.