Please note this thread has been inactive for 90 days. For the best results, please start a new thread.
Results 1 to 4 of 4
  1. #1
    Cadet
    Join Date
    Sep 2003
    Posts
    18

    Default 1980 15hp power head rebuild questions

    I am about ready to split the cylinder case to get to the crankshaft and ultimately replace a piston and rings due to a sieze. I do not want to replace items that are still good but am not sure what to look for.Specifically how do I determine if the bearings are good or bad. Can I make that determination now before I go in by checking for slop in the crank or am I looking for discoloration? Are there any parts that should be replaced as a matter of maintenance since I am in the case anyway? Any advice would be helpfull as I am entering uncharted territory.

  2. #2
    Moderator JB's Avatar
    Join Date
    Mar 2001
    Location
    The Hideout, Whitt, TX, USA
    Posts
    45,903

    Default Re: 1980 15hp power head rebuild questions

    You really need a Repair Manual, BRC.You will need to dismantle and inspect the lower end to determine if the bearings need replacement.Good luck.

  3. #3
    Admiral Chinewalker's Avatar
    Join Date
    Aug 2001
    Location
    1000 Islands, NY
    Posts
    7,094

    Default Re: 1980 15hp power head rebuild questions

    Hi BRC, Typically, bearings in need of replacement are OBVIOUSLY in need of replacement. Bearings that spin quietly, are shiny, and mate onto equally shiny journal surfaces are probably good. Bearings that have dark colored pits, rust, ridges, flat spots, etc. are probably bad. Race engine builders actually like using used bearings, as the motors run looser and faster... Also - get a manual - worth it's initial cost in saved frustration...- Scott
    Share A Project Page for 1971 GW Invader Banchie 13
    http://www.shareaproject.com/pages/p...,p,433,00.html
    Share A Project Page for 1976 American 18
    http://www.shareaproject.com/pages/p...,p,404,00.html
    Share A Project Page for 1974 American 15
    http://www.shareaproject.com/pages/p...,p,405,00.html

  4. #4
    Cadet
    Join Date
    Sep 2003
    Posts
    18

    Default Re: 1980 15hp power head rebuild questions

    Thanks for both your input. I do have a manual and have been studying it thoroughly. It is a great help but tends to state things matter of factly with the assumption you know all the rest.This board has been a great place to fill in all the blanks.

Similar Threads

  1. Couple questions on 1980 Evinrude 15hp ?? with pics
    By northshoremb in forum Johnson & Evinrude Outboards
    Replies: 6
    Last Post: July 26th, 2009, 04:25 AM
  2. 15hp rebuild questions
    By Kajun37 in forum Johnson & Evinrude Outboards
    Replies: 2
    Last Post: December 4th, 2007, 11:53 AM
  3. Rebuild questions 1980 75hp
    By CBINMN in forum Johnson & Evinrude Outboards
    Replies: 7
    Last Post: August 6th, 2007, 08:45 AM
  4. Engine rebuild questions, 1980 E25
    By BugEyes in forum Johnson & Evinrude Outboards
    Replies: 63
    Last Post: June 21st, 2005, 06:09 AM
  5. 1980 15hp Evenrude Power Head removal question
    By BRC in forum Johnson & Evinrude Outboards
    Replies: 1
    Last Post: November 29th, 2003, 03:55 AM
  1. iboats Forum Directory - Over 100,000 forum posts organized by topic