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Thread: Port map.

  1. #1
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    Question Port map.

    Does anyone out there have a factory port map for a FR19s that you could share ?

    Need a good baseline on where to start on a 49" .

    Thanks

    lawrence Thornton

    Florence SC

  2. #2
    Team Member Jackson's Avatar
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    Iam75man
    Foreman's Marine

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    Team Member ima75man's Avatar
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    Quote Originally Posted by Jackson View Post
    Iam75man
    tim kurtz, fast fred, smoking joe, there's alot of 3 cylinder omc gura on this site.........check out the fast fred mod-50 page...i'm just a shade tree omc rookie.. out
    out front again

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    Just learning how to decipher Fred's CODE language is hard enough.
    Plenty of round about statements, but no info.
    Just need a factory fr19 map, not someone's hard earned secrets.

    LT

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    Team Member ima75man's Avatar
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    Quote Originally Posted by thornl01 View Post
    Just learning how to decipher Fred's CODE language is hard enough.
    Plenty of round about statements, but no info.
    Just need a factory fr19 map, not someone's hard earned secrets.

    LT
    phil mc-daniel he has pistons made for the omc 3 cylinder,i'm sure he knows everything you need to build a mod 50 type powerhead.....
    out front again

  6. #6
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    one and a half inches from the top of the deck. sweep it out like a power valve, like the top of the port on a 75hp only way more.

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

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    Sam Cullis Mark75H's Avatar
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    Power valve? I think you are using the wrong term again
    Since 1925, about 150 different racing outboards have been made.


  8. #8
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    um, no, it's not straight out, it's swept . like a closed power valve, for sure

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

  9. #9
    Sam Cullis Mark75H's Avatar
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    still doesn't make sense ... a closed power valve?
    Since 1925, about 150 different racing outboards have been made.


  10. #10
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    um, ok then. the port map does not show it, but you can make it a straight out port, it will still make enuff low end foot pounds to get it on plain.
    Attached Images Attached Images  

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

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