• Re: The Next Hurdle in the old 15Hp Johnson saga - machnumber2 11:23:51 04/21/03 (3)
  In Reply to: Re: The Next Hurdle in the old 15Hp Johnson saga posted by KenOhki on April 19, 2003 at 17:46:27:

  Good luck with the test. If it turns out that the motor is not being cooled properly because of water flow thru it, what would the symtoms be?
  
  

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  • Re: The Next Hurdle in the old 15Hp Johnson saga - KenOhki 12:52:53 04/21/03 (2)
    In Reply to: Re: The Next Hurdle in the old 15Hp Johnson saga posted by machnumber2 on April 21, 2003 at 11:23:51:

    I think it would pretty much overheat, and stall out. it might also act/sound/run funny as it approached overheat status. I do not think it will overheat, as I said, I had it apart, and with another pump sent water throught the system,, its circulating, just not making the tatle tale. the motor ran over 1/2 hour in the bucket at trolling speed with the prop turning and was cool to the touch everywhere. I dont think heat is a problem.

    I did not get to take the boat out easter sunday. The repairs ( fiberglassing ) went very well as expected, its all cured and painted ready for action.

    There is still allot of ice everywhere around here, but there is a place or 2 I could go. Probably wont get the chance to get out now til the weekend. Maybe Ill get my casting deck finished sometime this week.
    
    
    

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    • Re: The Next Hurdle in the old 15Hp Johnson saga - olddoc 06:45:34 04/27/03 (1)
      In Reply to: Re: The Next Hurdle in the old 15Hp Johnson saga posted by KenOhki on April 21, 2003 at 12:52:53:

      Will add some information since i have given 3 of the old 15 Johnson/
      Evinrudes to the junk yard because of the water pump. The clincher is
      to change the impeller or do much of anything to it you have to lower
      the lower unit and that means lower the drive shaft and that means the
      shaft must slip out of the base of the power head. The upper endof
      the drive shaft is a splined fitting into the base of the power head
      and unfortunately they rust and no amount of pulling, banging, or
      liquid wrench will make it turn loose. I could not find a dealer or
      repair shop that had a solution. That pin you mentioned is made onto
      the drive shaft and should not have been free. It sounds like the
      previous owner worked on the water pump and saw the light.
      If you did drop the shaft down and got the top of the pump off
      then you are home free but if you didn't drop the drive shaft then
      the pump is probably not working. Put the ear muffs and water to
      the water intake on the lower unit and start the engine and if the
      water pump is working it will push the water out through the propeller
      hub with some force but not a lot.
      Good luck and if you find a sollution to getting that shaft out
      i would like to know it. The stream from the telltale hole should
      spurt out at least two inch or so.
      
      
      

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      • Re: The Next Hurdle in the old 15Hp Johnson saga - KenOhki 09:56:10 04/27/03 (0)
        In Reply to: Re: The Next Hurdle in the old 15Hp Johnson saga posted by olddoc on April 27, 2003 at 06:45:34:

        I guess I got lucky then, becuse my shaft comes out without any problems. My manule recomends a touch of greese when putting it together each time to help it apart next time.

        were I faced with having to remove one that was caroaded or otherwize stuck,, I would probably attach vice grips and pound on the vice grips. I have done similure things with much suggese.
        
        

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