Driveline
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Driveline

  1. #1
    Senior Member
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    Default Driveline

    How critical is it that the drivline be balanced between the motor and the jet? I know stupid question.

    I say that its important.

    boat owner says its not that important cause its so short.

    Just confirm this for me please. I figure it would trash bearings and seals,
    Thanks

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  3. #2
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    hello?
    i'm not trolling here....

  4. #3
    Senior Member H20MOFO's Avatar
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    Dude...how big is you jet dl..?? What kind of dl do you have?? A pic might be a bonus..
    Another Hot Boat refugee

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  6. #4
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    Quote Originally Posted by Psycotic Break View Post
    How critical is it that the drivline be balanced between the motor and the jet? I know stupid question.

    I say that its important.

    boat owner says its not that important cause its so short.

    Just confirm this for me please. I figure it would trash bearings and seals,
    Thanks
    If it spins it needs to be balanced. A little or alot it needs to be balanced.Water pumps starters altanatiors ect are all balanced. IMO if it spins balance it.Just my .02 cents

  7. #5
    Horsepower sells Engines lefty's pride's Avatar
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    I'd agree with that, you can get harmonic vibrations from unbalanced items, not that i have seen it in jet drive lines but i have seen it else where
    "Horsepower sells Engines but torque wins races."
    "winners never quit, quitters never win
    those who never win and never quit are idiots"
    "if at first you don't succeed redefine success"
    "why is there never time to do it right, but there is aways time to do it twice"

  8. #6
    Senior Member lbhsbz's Avatar
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    Balancing is always a good idea, but a minor imbalance will not affect much if the distance between the supporting bearings is small. Even my 18" driveline looks way out of wack, but because of the small diameter and relatively short length...it required very little to balance it.

    Balancing becomes much more critical with longer unsupported distances and larger diameters. Most jet drivelines are too short I'd think to really matter. I've built my own 18-20" drivelines on hot rods and didn't balance them...no vibration at all...but small imbalance on a 60" driveline or on a 14" brake rotor will rattle your teeth out
    Last edited by lbhsbz; 01-15-2010 at 12:02 AM.

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