1941 KB-3 Wobbler

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  • Buccaneer

    US Member - 1 Year
    Replies: 6452
    Topics: 958
    #271640

    This is the first wobbler I’ve ever seen that had grooves on it’s center bore.
    There’s matching ridges on the rotor’s “high side”, but not all the way
    around it’s circumference.
    What do you suppose was the reason of the engineer’s design,to have these
    grooves?

    DSCN5886

    DSCN5887

    Prepare to be boarded!

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    frankr

    US Member - 1 Year
    Replies: 6414
    Topics: 50
    #271659

    Somebody will probably beat me to it before I get my brain fired up and remember the name of the seal.  Same process as the grooved center bearing on OMC powerheads.


    frankr

    US Member - 1 Year
    Replies: 6414
    Topics: 50
    #271663

    The word is Labyrinth Seal.  The reply was speculation.


    Buccaneer

    US Member - 1 Year
    Replies: 6452
    Topics: 958
    #271664

    The steam driven turbine generators at work had labyrinth seals with
    oil pumping through them to keep the hydrogen in the generator.
    I guess in Mercury’s design it helped to keep the water from bypassing
    from going to the powerhead.

    Prepare to be boarded!


    green-thumbs

    US Member - 2 Years
    Replies: 550
    Topics: 41
    #271689

    The grooves in brass cam are machined not wear. I do not know about the Wobbler. Brian Wilcox makes them on an exchange basis due to metal parts embedded in the Wobbler.

    If I were forced to Walk the Plank and make a guess, it would be the grooves in the Oscillator (Hockey Puck) are part of design to trap water between brass cam and rubber oscillator to lubricate both and reduce wear. especially when operating in shallow water where sand and silt are part of the mx.                 My best guess anyway.

     

    Louis

    • This reply was modified 6 days, 13 hours ago by green-thumbs.
    • This reply was modified 5 days, 14 hours ago by green-thumbs.

    Buccaneer

    US Member - 1 Year
    Replies: 6452
    Topics: 958
    #271692

    The grooves in brass cam are machined not wear. I do not know about the Wobbler. Brian Wilcox makes them on an exchange basis due to metal parts embedded in the Wobbler.

    If I were forced to Walk the Plank and make a guess, it would be the grooves in the Oscillator (Hockey Puck) are part of design to trap water between brass cam and rubber oscillator to lubricate both and reduce wear. especially when operating in shallow water where sand and silt are part of the mx.                 My best guess anyway.

     

    Louis

    • This reply was modified 6 days, 13 hours ago by green-thumbs.
    • This reply was modified 5 days, 14 hours ago by green-thumbs.

    Just ordered a wobbler from Brian a few minutes ago!

    Prepare to be boarded!

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