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Thread: omc 15" - 3cyl. driveshaft's

  1. #1
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    Default omc 15" - 3cyl. driveshaft's

    Hello'
    Are there anymore differance's between these (2) driveshaft's,
    beside's the water pump key's ?????

    Pt.# - 389508 plastic wedge key, think it's a stinger shaft

    pt.# - 391377 woodruff key sst-60 shaft

    Thank's

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    i've found ether fit the same, the one with the flat spot(gets the plastic key)is newer,

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

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    [QUOTE=Fast Fred;116849]i've found ether fit the same, the one with the flat spot(gets the plastic key)is newer,[/QUOTE
    Thank's Fred
    Will both of these shaft's work in case's listed below ?

    sst-60

    nitro - or 2 cyl

    75 stinger

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    yes, the two cyl cases always seem to go together tight with 3 cly guts, if you build one you'll know.

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

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    All SST60 gearcases came with the flat drive key. The woodruff style was used on 2 and 3 cylinder shafts in the 70's. All later shafts are flat key design. 2 and 3 cylinder gearcase housings are the same in all respects.

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    Thank's Sam
    How about interior part's swap's, of these small diamenter case's ?

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    If you are referring to changing 2 and 3 cylinder gears..the only difference is the way the forward gear bearing is supported. You have to change the forward bearing carrier with the gears. 2 cylinder has a needle bearing and 3 cylinder has a tapered roller.

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    Seem's both driveshaft's are legal in sst-60 .

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