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  1. #1
    Petty Officer 1st Class The Famous Grouse's Avatar
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    Default 1972 6 HP Johnson - What are the compression specs?

    Folks, I'm looking at buying a 1972 Johnson 6 HP.

    I swear I've searched this forum and online, but I cannot for the life of me find somewhere that has the specs for compression.

    Can someone please tell me what the specs should be and if possible pls give an online source as I've had to ask this question before about another motor.

    Thanks.

    Grouse

  2. #2
    Vice Admiral bktheking's Avatar
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    Default Re: 1972 6 HP Johnson - What are the compression specs?

    Nor will you find one, they really didn't publish a "spec" sheet for compression numbers. I'd expect 80+ and close on both cylinders to be good, great would be 100+, 50 and lower may have some issues.
    Signature- If you have fuel and spark- Have you checked compression?

  3. #3
    Petty Officer 1st Class The Famous Grouse's Avatar
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    Default Re: 1972 6 HP Johnson - What are the compression specs?

    Appreciate the reply, thanks.

    Grouse

  4. #4
    Captain Tim Frank's Avatar
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    Default Re: 1972 6 HP Johnson - What are the compression specs?

    Quote Originally Posted by The Famous Grouse View Post
    Appreciate the reply, thanks.

    Grouse
    And they should be balanced....+/- 10% of each other....

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