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  1. #1

    Default 1962 johnson 18 hp fd16a won't spit water

    I have a 1962 johnson 18hp fd16a outboard that won't spit water. I've changed the impeller. Put a new thermostat in it. Not to sure what could be causing this. Any input would be greatly apperisacted!

  2. #2
    Join Date
    Dec 2015
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    Default Re: 1962 johnson 18 hp fd16a won't spit water

    Hold your hand behind the exhaust relief haf way up the leg. Hot water mist should drip off of your fingers?
    It takes a nickle to go first class!
    If it aint broke dont fix it!!

  3. #3

    Default Re: 1962 johnson 18 hp fd16a won't spit water

    Quote Originally Posted by kimcrwbr1 View Post
    Hold your hand behind the exhaust relief haf way up the leg. Hot water mist should drip off of your fingers?
    Havent tried that yet. But from what I've seen there is a drip of water that comes from the exhaust when running.

  4. #4

    Default Re: 1962 johnson 18 hp fd16a won't spit water

    Quote Originally Posted by kimcrwbr1 View Post
    Hold your hand behind the exhaust relief haf way up the leg. Hot water mist should drip off of your fingers?
    Havent tried that yet. But from what I've seen there is a drip of dirty water that comes from the exhaust when running.

  5. #5

    Default Re: 1962 johnson 18 hp fd16a won't spit water

    And why would rye head be hissing/ smoking is it because the water isn't cooling it down?

  6. #6
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    Dec 2015
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    Default Re: 1962 johnson 18 hp fd16a won't spit water

    Pull the thermostat and start it up water should gush out the hole?
    It takes a nickle to go first class!
    If it aint broke dont fix it!!

  7. #7

    Default Re: 1962 johnson 18 hp fd16a won't spit water

    I'll have to try If it doesn't gush water is it that the impeller was put on wrong or the water tube didnt line up correctly when putting the lower unit back on?

  8. #8
    Join Date
    Dec 2015
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    Default Re: 1962 johnson 18 hp fd16a won't spit water

    Yes if it dont gush you need to revisit the pump. When you installed the impeller housing did you spin the shaft clockwise?
    It takes a nickle to go first class!
    If it aint broke dont fix it!!

  9. #9

    Default Re: 1962 johnson 18 hp fd16a won't spit water

    Okay thank you won't be able to try until tomorrow will let you know if that works or not

  10. #10
    Join Date
    Nov 2011
    Posts
    1,958

    Default Re: 1962 johnson 18 hp fd16a won't spit water

    Do you have it deep enough in the water? Bulge where the pump is located needs to be submerged before starting motor. "Gush" means a heavy spray being blown out by exhaust relief any time it is running.

  11. #11

    Default Re: 1962 johnson 18 hp fd16a won't spit water

    Yeah its deep enough in the water. No water besides a drip very so often come out of the exhaust relief where the water gets spit back out

  12. #12
    Join Date
    Dec 2015
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    maplevalley WA
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    Default Re: 1962 johnson 18 hp fd16a won't spit water

    If you get plenty of water at the thermostat pull the head and install a new head gasket. Was there alot of crap on the old thermostat? Get a jug of saltaway after you get good water flow and pour it in the barrel and run the engine a 1/2 hour or so to flush out all the cooling circuits.
    It takes a nickle to go first class!
    If it aint broke dont fix it!!

  13. #13
    Join Date
    Apr 2016
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    barnegat NJ
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    3,143

    Default Re: 1962 johnson 18 hp fd16a won't spit water

    Keep us posted Jpettit

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