Cummins Marine Diesel Repower Specialists › Forums › Marine Transmissions › Help id transmission (hopefully)

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  • August 20, 2018 at 8:49 am #36187

    Shawn
    Participant

    Trying to get better pictures but for now this is what I have.

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  • September 4, 2018 at 6:15 pm #36781

    Shawn
    Participant

    I have it and am able to run it now, but prop seems too big maybe. I had a 2:1 before, was kind of hoping it was a 1.75:1 and I’d be ok.

    September 4, 2018 at 4:23 pm #36766

    Tony Athens
    Moderator
    Vessel Name: Local Banks
    Engines: QSB 6.7 550 HP
    Location: Oxnard, CA
    Country: USA

    Same base ratio Fwd & Rev…………Figuring it out???–Without running the engine and using a strobe you can’t..

    Other ways are to use 50-100PSI air to engage the FWD clutch.. Turn / Bar engine over by hand and count revolutions “in vs. out”.. Use a 15/16″ socket on the alternator pulley is easy.way to bar an engine over in the correct rotation

    Tony

    September 4, 2018 at 4:12 pm #36762

    Shawn
    Participant

    Anybody know how I can figure out what ratio it is? It has no tags and no info, also do they have the same ratio in forward and reverse?

    August 20, 2018 at 10:31 am #36198

    Shawn
    Participant

    Seems correct, thanks.

    August 20, 2018 at 9:33 am #36192

    Rob Schepis
    Forum Moderator
    Vessel Name: Tenacious
    Engines: 6BTA 5.9 330's - "Seaboard Style"
    Location: Long Island, NY
    Country: USA

    Looks like a ZF220A to me… Post the better pics when available

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