1978 johnson 115

[cds11]

just picked up a 1978 Johnson 115 that has 140 psi on all cylinders. just got a few questions before I put it on the boat
.

1. it doesn't have power trim but I'm getting a 1977 Johnson 115 parts motor that does have power trim, can it be easily adapted to power trim?

2. this is my first non direct oil injection motor, what is the best oil to gas ratio?

3. I found the grey wire in the controls for the tach but no power and ground. wheres the best place to get them from?

 

[Boobie]

Your power tilt/trim units are entirely different but you may be able to make it work. 50:1 is the best fuel/oil ratio.

 

[phillnjack]

purple is ignition positive and black is ground.