Logo
Results 1 to 4 of 4
  1. #1

    Default 1988 and 1976 Johnson power head swap

    Hello all Iím new here, Iím very mechanical and have worked on vehicles my whole life but Iím not too familiar with outboards and was looking for some answers hopefully. I have a 1988 evinrude 90hp on my boat that lost a cylinder last year, a chunk of piston broke off and gouged the cylinder pretty deep. This spring I was given a 1976 Johnson 85hp for free from a friend that had an old boat sitting around and just wanted to get rid of it. Itís sat for years so I soaked the cylinders for a couple days and did a compression test on it and itís bang on 100psi across all 4 cylinders. My question is can I unbolt the 1976 powerhead from the midsection and bolt it into mine? All the motor mounts look the same and everything but Iím just not sure about the drive and the exhaust? From what I can find it should bolt in but I canít find a for sure answer and would rather not pull them both apart to find out it will not work. The reason I just want to swap powerheads is to keep my current tilt/trim set up as the older one would need a full rebuild.

  2. #2
    Join Date
    Nov 2011
    Location
    tennessee
    Posts
    5,411

    Default Re: 1988 and 1976 Johnson power head swap

    Sorry but no...... exhaust and powerhead mounting pattern different
    Pappys Sales and Service
    Owner and Factory Certified Technician
    Former racer KDBA (Kentucky Drag Boat Association)

  3. #3
    Join Date
    Sep 2010
    Posts
    24,005

    Default Re: 1988 and 1976 Johnson power head swap

    Agreed---no fit.----Just rebuild the 1988 model 90 HP.-----With 4 new o/s pistons it will be good for many years.

  4. #4

    Default Re: 1988 and 1976 Johnson power head swap

    Sell everything .

    Buy brand used.

Similar Threads

  1. Johnson 48hp to 60hp power head swap
    By Nickpetrinko in forum Johnson Evinrude Outboard Forum
    Replies: 1
    Last Post: 12-20-2016, 10:19 PM
  2. power head swap
    By ship wreck in forum Johnson Evinrude Outboard Forum
    Replies: 3
    Last Post: 08-17-2013, 12:37 PM
  3. Power Head swap
    By Charger25 in forum Johnson Evinrude Outboard Forum
    Replies: 4
    Last Post: 06-24-2012, 03:58 PM
  4. Power Head swap
    By Charger25 in forum Johnson Evinrude Outboard Forum
    Replies: 0
    Last Post: 06-12-2012, 07:49 AM
  5. Power head swap out
    By kimbo in forum Johnson Evinrude Outboard Forum
    Replies: 1
    Last Post: 06-04-2012, 10:47 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •