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  1. #1
    Boost addict hotbird's Avatar
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    will a 4tec engine run correctly with the balance shaft not clocked correctly?

    Just had a good running engine that we tore down and found the balance shaft marks not lined up with each other.
    They where almost 180 deg off.

    Any body know what all this would effect?

    I would think the motor would have shaking like crazy but it did not, it ran strong.


  2. #2
    Boost addict hotbird's Avatar
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    anyone have any idea?

  3. #3
    Eastside Powersports Slow 91's Avatar
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    it would shake like a bastard

  4. #4
    Boost addict hotbird's Avatar
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    Quote Originally Posted by Slow 91 View Post
    it would shake like a bastard
    I would think so too but it ran good

  5. #5
    imp0ster's Avatar
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    Bad harmonics will destroy the engine. It will shake more down low and become a tight vibration in the higher RPMs.

  6. #6
    Boost addict hotbird's Avatar
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    Good thing it was opened up now then.

  7. #7
    blackvr's Avatar
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    Quote Originally Posted by hotbird View Post
    Just had a good running engine that we tore down and found the balance shaft marks not lined up with each other.
    They where almost 180 deg off.

    Any body know what all this would effect?

    I would think the motor would have shaking like crazy but it did not, it ran strong.
    I had a engine that ran for a couple hundred hours with the balance shaft installed incorrectly. never noticed anything strange. tore it down to install a flywheel when i noticed, fixed it, engine never really ran any different. its more of a vibration absorbing device. wont have much effect on damaging bearings or damaging engine if installed incorrect. maybe if it was run for 1000s of hrs it might

  8. #8
    jkyle's Avatar
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    A tooth one way or the other might not make much difference .
    Could use a stobe light, it's amazing how much a motor moves and how...kinda scary
    Got a chance to see Snapper use a stobe to look for places that could fatigue on a mower.

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