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  1. #1
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    Sep 2004
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    Compression numbers

    I'm looking at an 89 model champion with an '89' 150 Yamaha on it. The dealer faxed these compression numbers over to me. Any input on these numbers or the motor in general?

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    2018 LEGEND 211R | 250 MERC PROXS

  2. Member 302w's Avatar
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    Jun 2004
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    Houston
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    #2

    Re: Compression numbers (jbabin76)

    Those are good numbers Joel as they are all within 10% of each other.
    Burning the candle at both ends.

  3. NC Bass Club/Yamaha Motors Moderator BuzzB8's Avatar
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    Jun 2004
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    Asheboro, NC
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    #3

    Re: Compression numbers (jbabin76)

    18 year old engine...be careful! How clean are the cylinders and piston crowns? Are the fuel pumps and fuel lines relatively new?

  4. Member
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    #4

    Re: Compression numbers (BuzzB8)

    I haven't had a chance to look at anything...this boat is about 5-6 hours from my house, and I just found it.

    I'm not sure I will proceed with anything, actually would like the boat with a new motor on it.

    Really want to know if anyone knows what the compression would be new, or rebuilt to see if how far these numbers are off.

    2018 LEGEND 211R | 250 MERC PROXS

  5. Member
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    #5

    Re: Compression numbers (jbabin76)

    ttt

    2018 LEGEND 211R | 250 MERC PROXS

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