I have a 1973 Johnson 65 HP, recently purchased.
Compression is 12o on all 3 cylinder, it starts easily and run very well in throttle. When in nutral it revs extremly high, i cannot for the life of me figure out how to lower the idle. Everything is hooked up well, i have tried to give a few...
I just purchased a boat with what i believe a 1975 mercury outboard.
The motor starts and revs up nice in neautral, when you engage it and try to punch it just goes oh about 8 MPH.
I chaneged the plugs really really good spark,
Compression in Top Cylinder is 135 psi the bottom two are at...