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Thread: Fast Fred's Secrets of the OMC MOD50's Thread #1

  1. #41
    FFX-61
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    i think these are v-4 reeds from the 140hp, and that v-8 reeds are 6 over 6,
    these bein 5 over 5

  2. #42
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    lookin for a set of them by the way, unmolested

  3. #43
    FFX-61
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    hear we have OMC Mod50 "straight in" number 300
    it's in "as raced" condition, this bein a race moda, Only one piston fits it, thare were No over sizes, 3.030" was it
    so once a bore wore out, it was time for a new sleeve or new case set.
    lookin at the bores of number 300, gota say the thing ran NICE , 1 and 2
    are reddy to be fitted, number 3 how ever is out side tallerance. but more important, She never blowed up
    Last edited by Fast Fred; 01-15-2006 at 06:26 AM.

  4. #44
    David_L6
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    Fred, I think you can still get sleeves from L.A. Sleeve.


    I'm about done gathering up parts now. Have a cylinder head on the way. Rules required use of regular fishing motor front half / reed cages / carbs so nothing fancy on that end. I'm thinking that I'll go ~.050" to .075" lower on the ports than the Mod 50 timing.......


    I'm thinking of having a head built with a true hemi combustion chamber later on (after I get a motor together and tested).
    Last edited by David_L6; 01-15-2006 at 04:34 PM.

  5. #45
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    I altered the port hights in my 19s cuz the hull i'm runin has a 13" tunnel.thinkin full port hight would work nice for a hull like that L6 .

  6. #46
    David_L6
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    Quote Originally Posted by Fast Fred
    I altered the port hights in my 19s cuz the hull i'm runin has a 13" tunnel.thinkin full port hight would work nice for a hull like that L6 .

    I'm not sure how good an oval course race motor it would make with full port height and 1:1 gear ratio....... Can always raise the ports later. Can't lower them though.

  7. #47
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    this was a Factory proto, had the full map, layed down the LAW.
    did do some research on the mod50 with reg front and carbs, on the short corse, it killed everbody. thats why i built one goin on two.

  8. #48
    Sam Cullis Mark75H's Avatar
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    Quote Originally Posted by David_L6
    I'm not sure how good an oval course race motor it would make with full port height and 1:1 gear ratio....... Can always raise the ports later. Can't lower them though.
    True, but even the most extreme factory Mod 50 was an oval course racer


    Quote Originally Posted by Fast Fred
    this was a Factory proto, had the full map, .
    We can ask the original owner about that
    Since 1925, about 150 different racing outboards have been made.


  9. #49
    Team MSR
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    Default Mod 50 porting....

    Full tilt Mod 50 porting worked just fine on our FRR motor 20 something years ago. Big old flat deck Desilva with two guys in it.

    There is at least one FEH out there with full Mod 50 porting. He runs better than most....

    Michael D-1

  10. #50
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    I don't know the owner, but did talk to one of the builders of that Moda.

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