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  1. #1
    Cadet
    Join Date
    May 2010
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    4

    Default 1959 johnson sea horse 35 hp

    can any one tell me how to check if the waterpump is working corretly

  2. #2
    Admiral CATransplant's Avatar
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    Feb 2005
    Location
    St. Paul, MN
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    6,319

    Default Re: 1959 johnson sea horse 35 hp

    Sure. When it's running, you should see water and exhaust coming out of the exhaust relief port on the rear of the leg. The amount of water varies with engine speed but should be a goodly amount.

    Note: You must have the leg immersed in water several inches above the anti-ventilation plate for the pump to work correctly. Often, people testing these outboards in a barrel don't have them deep enough.

    If this outboard is new to you, you should replace the water pump impeller before using the outboard. Odds are you don't know when it was done last and, if the outboard has been sitting, the impeller will be brittle and prone to disintegrating.

    Great outboard, by the way! Once you have it all sorted out, you'll fall in love with it, I guarantee. You may have to replace the coils in the magneto, though, if that has not already been done.

    Sure...go ahead and laugh at my old aluminum boat. It's paid for!

  3. #3
    Cadet
    Join Date
    May 2010
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    4

    Thumbs up Re: 1959 johnson sea horse 35 hp

    thanks , i just got the motor for nothing. I replaced the points and condenser and fired up on the third pull. I had it in a garbage can with water above the intake screen but couldn,t see water coming out of the exhaust. I was running 50:1 87 octane i've read 24:1 is the right mixture. Any sugestions?

  4. #4
    Supreme Mariner
    Join Date
    Jul 2006
    Location
    Florida Gulf Coast
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    Default Re: 1959 johnson sea horse 35 hp

    1. Get it down in the water.
    2. Water discharge will vary according to whether or not the thermostat is open. But should always be at least a spray. The thermostat is constantly sampling the temperature and opens and closes as necessary to maintain proper termperature.
    3. It is supposed to run on 24:1. Beyond that, it is a war out there. Do whatever you want--it's yours.

  5. #5
    Vice Admiral
    Join Date
    May 2008
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    TX, Formerly FL
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    5,187

    Default Re: 1959 johnson sea horse 35 hp

    The water has to be way high on the leg for it to pump. If you just cover the screen it will never pump.
    24:1 is the mix

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