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Thread: OMC 727 race motor

  1. #21
    Sam Cullis Mark75H's Avatar
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    CCC was based on a production motor ... mostly a special front and lower unit.


    The 727 was a prototype that was never put in production
    Since 1925, about 150 different racing outboards have been made.


  2. #22
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    Red face

    Looseunit225

    It seems to be a 60degree looper race motor that very few were made and we havn't yet found anyone that has any data on them.
    They would be after the CCC

    Powerabout

  3. #23
    Sam Cullis Mark75H's Avatar
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    What I posted earlier on this thread is WRONG!

    The 727 was after the CCC/RS!!

    Quote Originally Posted by Nerstrom
    When the OMC & Mercury factory race wars moved from ON to OZ we found ourselves at a disadvantage to Mercury. Charlie Strang asked us to build the biggest displacement Loop V6 we felt we could put on the race course. OMC used three digit project numbers to track project costs. When we designed the first of many 3-cylinder race engines we were given project number 717 and because of its success became attached to numbers ending with “7”. The 727 Looper V6 was next followed by the Race V8 which was 757. The model numbers found on the serial number plate followed a different system, but that’s another story.

    The 727 was a totally new design with early versions having a displacement of 173 cubic-inches followed by 183 cubic-inch versions. The engines were given to factory sponsored drivers and for a short time raced along side the V8. Jimbo did all of the development testing and Fred Hauenstein worked on this engine just before he left for Mercury. Torque and power were spectacular but RPM was limited due to the long stroke.

    Jim
    Find it has post # 7 here: http://www.boatracingfacts.com/forum...=727#post12056

    That would make the time 1980-81

    This is all the information you will find anywhere on the 727!
    Since 1925, about 150 different racing outboards have been made.


  4. #24
    Preserving OMC Heritage LIQUID NIRVANA's Avatar
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    Quote Originally Posted by Powerabout View Post
    There was a thread here or S&F which puts it during the V8 time or just after?
    someone posted a photo (which I am sure I copied somewhere) which showed a powerhead painted the same colour as a 1975 75 stinger red.
    It looked like a crossflow to me but the photo was low res.

    What was the V6 that Cees VV was working on that seaway now has??

    Clearly F1 was going to be 2.0 or 2.5 in those days I would guess?
    You are thinking of the prototype V6 Johnson. Here is a picture:


    ================================================== =======

  5. #25
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    hi Liquid

    Is that the only photo in existance?
    I wonder if Jimbo can add any more?

    Powerabout

  6. #26
    Sam Cullis Mark75H's Avatar
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    Those pictures are from 1973 and are not the 1980-ish 727
    Since 1925, about 150 different racing outboards have been made.


  7. #27
    Burgess/Evinrude F1 V8 Lars Strom's Avatar
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    I believe the "Molinari Monster" and this one is the 727 engine..
    Attached Images Attached Images  
    Lars Strom

    Life is good





    Check my own racing history at BRF...http://www.boatracingfacts.com/forum...ead.php?t=6727

    My racing web site SVERA.se....http://svera.se/blogg/paris-6-hours/

  8. #28
    Team Member looseunit225's Avatar
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    so if we can make so much power out of these BRP engines why isnt any of us racing the engines in F1????

    i relise that we cant get them to rev as hard as the 2ltr and 2.5ltr but theres NO replacement for the displacement!
    BRP = Better Racing Products!

  9. #29
    Burgess/Evinrude F1 V8 Lars Strom's Avatar
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    Quote Originally Posted by Lars Strom View Post
    This is the Molinari Monster.. 1979 or 1980.
    if I remeber right..2 X 3 liters V-6 "Loopers" with Fuel injection..
    The Racing 3-litre loop V6 became OMC Project Number: 420A727
    Lars Strom

    Life is good





    Check my own racing history at BRF...http://www.boatracingfacts.com/forum...ead.php?t=6727

    My racing web site SVERA.se....http://svera.se/blogg/paris-6-hours/

  10. #30
    Team Member looseunit225's Avatar
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    my life mission is to run a V6 looper in the F1 series and put the black crud back in its place
    BRP = Better Racing Products!

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