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Thread: Flywheel bolts

  1. #1
    Bob 1tommygunner1927's Avatar
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    Flywheel bolts

    Question for the experts:

    I want to do away with the "torque to yield" bolts for the flywheel. The stock bolts are flanged 8mm/1.25 and are rated at 10.9 (grade eight). I don't want to use a torque angle gauge.

    Is this doable, and if so, what torque value should be applied? 25-30 ft/lbs? Red locktite 272?


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    JT jpt7779's Avatar
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    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by jpt7779 View Post
    Thanks JT.

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    West Texas RXP skoepp's Avatar
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    Instructions are 11 ft lbs plus 50 degrees so that would be close.
    I want to say aprox 25 ft/lbs.

  5. #5
    A torque angle gauge is $14 at Summit racing. You'll need one for several other fasteners on the 4-tec motor. A tty bolt is designed differently than a regular bolt and will have a more uniform and higher clamping force. Obviously, the engineers at Rotax felt it necessary to use a tty type bolt for the flywheel application. Realizing the expense and time involved if a flywheel bolt were to fail, why would you not just go with the recommended tty bolts?

    Mark

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    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by Mark S View Post
    A torque angle gauge is $14 at Summit racing. You'll need one for several other fasteners on the 4-tec motor. A tty bolt is designed differently than a regular bolt and will have a more uniform and higher clamping force. Obviously, the engineers at Rotax felt it necessary to use a tty type bolt for the flywheel application. Realizing the expense and time involved if a flywheel bolt were to fail, why would you not just go with the recommended tty bolts?

    Mark
    Because the original flywheel bolts were removed & re-installed by the SeaDoo tech, I need to change them out & I'd rather use ARP bolts which have a higher rating than grade eight (stock bolts are 10.9 = grade eight), using red locktite 272, torqued to 25-30 ft/lbs and be done with it.

  7. #7
    Bob 1tommygunner1927's Avatar
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    Quote Originally Posted by skoepp View Post
    Instructions are 11 ft lbs plus 50 degrees so that would be close.
    I want to say aprox 25 ft/lbs.
    Yes, that is what the shop manual states....11 ft/lbs or 133 in/lbs, plus 50*.

    It was suggested to me to torque the bolts first to 15 ft/lbs, then to 30 ft/lbs., using red locktite. Now all I need to do is find the correct ARP bolt.

  8. #8
    Moderator beerdart's Avatar
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    Buy the kit #295501043 $10.11 for the complete kit six bolts and instructions.
    Torgue to 11 ft/lbs then put the wrench @ 12:00 and turn to 12:10 and your done.

  9. #9
    Quote Originally Posted by beerdart View Post
    Buy the kit #295501043 $10.11 for the complete kit six bolts and instructions.
    Torgue to 11 ft/lbs then put the wrench @ 12:00 and turn to 12:10 and your done.
    Technically, it would be 12:08:20. JK

    Mark

  10. #10
    Moderator beerdart's Avatar
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    Quote Originally Posted by Mark S View Post
    Technically, it would be 12:08:20. JK

    Mark
    Thats digital time I use a dial watch.

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