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  1. #1
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    question on a 1978 140 Johnson

    I have this motor on a 1979 glastron bass boat, when i get it up on plane full throttle it will do 45 or so, then after 15-30 seconds it sounds like it shifts gears and it kicks up to 50 or so, tha motor is rebuilt 10 hours or so and has new carb, any assistance would be a help

  2. Member 302w's Avatar
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    #2

    Re: question on a 1978 140 Johnson (trevrev97)

    Sounds like the prop digs in and hooks up better and increase your speed. Nothing to worry about.
    Burning the candle at both ends.

  3. Member
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    #3

    Re: question on a 1978 140 Johnson (Th' Ragin Cajun)

    ok thats wgat i thought but i was makin sure there wasn't something wierd goin on

  4. Member 302w's Avatar
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    #4

    Re: question on a 1978 140 Johnson (trevrev97)

    what prop are you running on it?
    Burning the candle at both ends.

  5. Member
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    #5

    Re: question on a 1978 140 Johnson (trevrev97)

    sounds like prop cavitation.

  6. Member
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    #6

    Re: question on a 1978 140 Johnson (robbieb)

    I Looked on it and it does not say so i really have no idea.

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