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  1. #46
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    Yes on that FUJIMO.

  2. #47
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    ...o.k...good...thx...thought I was lose'n it there for a minute when I dozed off...

  3. #48
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    Quote Originally Posted by FUJIMO View Post
    ...thought they were the same driven gear sets, used either rotation, but applied right-hand, the propshaft & bearing support load placement handled it better. No? (straight cut gears)


    LH HAD A BIG BULL GEAR—unsupported on prop shaft—-

  4. #49
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    Quote Originally Posted by GENE LANHAM View Post
    LH HAD A BIG BULL GEAR—unsupported on prop shaft—-
    ...exactly gene. the lefties weak point. not as much because of the bull gear itself, but because of its geometry & lack of the ability to support the propshaft well. the right hand unit was therefore spun in the opposite direction, because it could be, via a counter rotation powerhead, with equal durability to a standard rotation unit.

  5. #50
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    Quote Originally Posted by FUJIMO View Post
    ...exactly gene. the lefties weak point. not as much because of the bull gear itself, but because of its geometry & lack of the ability to support the propshaft well. the right hand unit was therefore spun in the opposite direction, because it could be, via a counter rotation powerhead, with equal durability to a standard rotation unit.
    MC---
    Click image for larger version. 

Name:	6-Cutaway SSm.jpg 
Views:	201 
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ID:	468360
    Same concept---but rotation can be changed in upper gearcase--(don't forget to reset load/preload in lower)

  6. #51
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    ...yup. pretty much the same geno...any one of them with the straight cut gears... that's the "dry" sump six drive there. see the little screened oil pump in the nose that Weissman helped develop...
    Last edited by FUJIMO; 06-27-2020 at 02:46 PM.

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  8. #52
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    with out pulling it apart.... the #8 ...3.4 lower is a LH///////how did Merc make it last?

  9. #53
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    Quote Originally Posted by Dave S View Post
    with out pulling it apart.... the #8 ...3.4 lower is a LH///////how did Merc make it last?
    ...still would like to see a photo or two of your 3.4 gearcase in question...

  10. #54
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    Quote Originally Posted by GENE LANHAM View Post
    LH HAD A BIG BULL GEAR—unsupported on prop shaft—-
    that design doesnt seem to worry OMC cases?

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  12. #55
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    OMC ,,,, haaazsszz thick p/[s......

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  14. #56
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    ...omc's were not available like the speedmasters were, i don't recall. the "speedmaster" trademarked name was an excellent marketing name & were made available to almost anyone. what general name did omc give those gearcases, like mercury did? were omc guys calling there's speedmasters too? can't remember.
    Last edited by FUJIMO; 06-29-2020 at 05:11 PM.

  15. #57
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    No special name like the Merc Speedmaster, Sportmaster or McCulloch "Sportsman" aka Custom

  16. #58
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    One OMC lower Unit was called the Clubfoot by the racers.
    Not an official name from OMC.
    Mark N
    "I'ma motorboatin' sonuvabitch!"

  17. #59
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    …...HeeHee……. ya could beeatt a SSM case...….with a clubd…...The OMC case was SOOOOO Beefey…...

  18. #60
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    T4 Pix

    Click image for larger version. 

Name:	Gear1.jpg 
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ID:	468581 This is an SST 140 Click image for larger version. 

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ID:	468582 This is a T4

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