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Thread: Fast Fred's OMC Mod 50 secrets Thread #2

  1. 03-07-2009 #41
    Fast Fred
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    did it for the three ram tilt and trim, YamaRude
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  2. 03-07-2009 #42
    Roy Hodges
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    Default Tilt un trim

    [QUOTE=Fast Fred;69339]did it for the three ram tilt and trim, YamaRude:..........................
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    I've never had the pleasure of seeing one up close . IAre the tilt & trim in this motor NOW ,in this picture ? if so, it's really hidden well. and which hoss powuh yamahammer it was donated from ? huh ? some of !
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  3. 03-07-2009 #43
    Fast Fred
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    i was usein that one to see if it would work, this is what it looks like when it's done ya need a Yamaha Pro50 bracket
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  4. 03-14-2009 #44
    Fast Fred
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    hay ima75man you got the part number for them jets, i don't have any, but i'll see
    how the Boss Lady can do for me.
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  5. 03-16-2009 #45
    Powerabout
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    Question Pressed versus cast in

    Quote Originally Posted by NERSTROM View Post
    The pressed sleeve die cast blocks were made by putting a special aluminum blank in the die, in place of the stock iron sleeves. After casting, the aluminum blank was carefully machined out leaving the intake and exhaust port passages. You could not tell a pressed sleeve block from a Tradewinds block without looking inside. These motors made a lot more power than the stock Mod 50 but Jack Leek would'nt let us use them since we had customers racing Tradewinds motors. The first one was raced by Jeff Brown at St. Louis, this was when we raced 15 minute heats. Jeff won by a big margin and started the OMC domination of Mod 50.
    Why did they make more power?
    thanks
    Powerabout
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  6. 03-17-2009 #46
    Fast Fred
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    the pressed in cools better, got the single vert exhaust bridge ,so you can oil it,
    bigger reed blocks.
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  7. 03-17-2009 #47
    Mark75H
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    Quote Originally Posted by Fast Fred View Post
    the pressed in cools better, got the single vert exhaust bridge ,so you can oil it,
    bigger reed blocks.
    Neither explains why it would make more power. Hopefully Mr Nerstrom will get back to us with the answer.
    Since 1925, about 150 different racing outboards have been made.

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  8. 03-18-2009 #48
    Fast Fred
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    bigger reed blocks
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  9. 03-30-2009 #49
    Powerabout
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    Behind the sleeve porting?
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  10. 03-31-2009 #50
    Fast Fred
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    had pressin liners, witch move the heat better, that aloud for bigger reed block

    Part one of "Secrets of the OMC Mod 50" : http://www.boatracingfacts.com/forums/showthread.php?t=2052
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