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Thread: OMC Guru question?????

  1. #1
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    Default OMC Guru question?????

    Whats the difference between a 1975 3 cylinder 75 hp stinger and a 1989 3 cyl 70 hp motor internally? I know there is a bit more compression in the stinger but that is achievable with the head are the rods/pistons different? Can you run all the later ignition on the older motor?
    Any help is appreciated.
    What year did they change the hp rating from powerhead to prop?

    Thanks in advance Bill

  2. #2
    Team Member Bill Gohr's Avatar
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    Default

    I left you my phone number

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    Default I dont see it

    where is your number? when is a good time to call?

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    Team Member Bill Gohr's Avatar
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    on your other post I am here now 847 356 3245

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    Administrator Ron Hill's Avatar
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    Default Phone Calls Aren't Fair

    Quote Originally Posted by Bill Gohr View Post
    I left you my phone number
    We are talking about getting that little Vee Bottom Class going in SoCal, we need to know the "SECRET" motors...

    Post a tape of your call, at least!

  6. #6
    Team Member Danny Pigott's Avatar
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    Default Omc

    The secret is the 75/75

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    75hp 1975 is a 49 cu in. 1989 70 is a 56 cu in. The 1989 is a much better motor.

  8. #8
    Team Member Bill Gohr's Avatar
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    Default Sorry Ron

    Quote Originally Posted by Ron Hill View Post
    We are talking about getting that little Vee Bottom Class going in SoCal, we need to know the "SECRET" motors...

    Post a tape of your call, at least!
    That conversation was on a "safe" phone line in the cone of silence.

    And yes if I wanted the "best" one to run, if you ask the old SE guys would have been the 1975 75hp short, however, have fun finding plenty of them to run, as well, a good 1986 70hp will have it covered

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    Cool 75 Engines

    Yes the 86 on engines have the bottom end, But you will still need to look back a few years for the short midsection.

    The BEST of the BEST was a "Pop powered 75".

    Mr Dan Pigot Sr had the stuff. no comparison period.

  10. #10
    Team Member LittleCharger's Avatar
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    Quote Originally Posted by thornl01 View Post
    Yes the 86 on engines have the bottom end, But you will still need to look back a few years for the short midsection.

    .
    Mounting the 86 on the short stinger mid coupled with the nitro case is the ticket.

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