Few more HP's out of a 35?

Discussion in 'Outboard Maintenance' started by jrod0785, Jun 3, 2010.

  1. jrod0785

    jrod0785 Well-Known Member

    199
    2
    343
    I have a 1985 Evinrude 35...It has been a great engine and is still running strong...Is there anything I can do or modify to the engine to pick up a few more ponies???
     
  2. Frank_Sebastian

    Frank_Sebastian Well-Known Member

    787
    2
    391
    Is it the 20 cu twin or a 3 cyl.? You can always polish out the ports a little and relieve back pressure by drilling a few larger holes in the exhaust housing, but that engine has been everything from an 18 to a 35 HP and it is near the limit because of displacement.

    Frank_S
     

  3. gheenoe

    gheenoe Got snook?

    75
    0
    331
    I know on large motors shaving the heads for more compression makes a big difference. Never heard of anyone doing it to a small motor.
     
  4. jrod0785

    jrod0785 Well-Known Member

    199
    2
    343
    I am guessing it is a 20 cu in twin. I defiantly know it is not a 3 cyl. I havent ever heard of anybody doing anything to really hype up smaller motors and figured I would ask. It would defiantly be cool to pick up some hp's though. I need to find out what the right prop is for the boat. I got one that seems to do fine until the boat is slam loaded and got one that does great loaded, but runs to high of rpms when its light.
     
Loading...
Similar Threads Forum Date
Not so optimistic anymore General Discussion Aug 24, 2017
FS: 2015 Dragonfly Emerger with Yahama 60, Trailer, and More Microskiffs For Sale Aug 20, 2017
East cape fury more goodies!! Bragging Spot Aug 15, 2017
More SM 1656 rigging Boat Yard Basics May 20, 2017
Chris Morejohn and early Hells Bay General Discussion May 11, 2017