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Thread: 912UL Issues

  1. #11
    Super Moderator Av8r3400's Avatar
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    Default Re: 912UL Issues

    After diagnosing with techs at LEAF they thought (for me) it is a problem with the Bellevue washers. These are cupped shaped washers that make up the spring that retains the driven gear in the gearbox, similar to the two stroke boxes.

    I was sent these washers, the retainer half rings and all the lock washers and gaskets to do the install.

    I'll take some photos of the job when I get to it, and post them here.
    Av8r3400
    Kitfox Model IV
    The Mangy Fox
    912UL 105hp Zipper
    YouTube Videos

  2. #12
    Senior Member Slyfox's Avatar
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    Default Re: 912UL Issues

    back when I had the early 912ul, I replaced those bevel washers because they wore so bad. Not sure if it ran smoother after ward, don't remember. It was a few years ago. with a press, it was a fairly easy job.

  3. #13
    Senior Member SkyPirate's Avatar
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    Default Re: 912UL Issues

    There are a couple you tube videos out there that show the process, doesnt look that hard to do

  4. #14

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    Default Re: 912UL Issues

    Quote Originally Posted by Slyfox View Post
    fantastic. when i left the airport last night I saw you going out the gate with your airplane in tow. I take it you went up to deer park with it. did you get a chance to fly it yet. I know a few years ago they complained of a rough engine and it kept the airplane from flying. glad you found the problem. what parts did they change out, very curious.
    Flew it this morning- spent about two hours in it running around the patch with no issues. Gonna spend a couple of days up in Deer Park til I get used to it then fly it back to my hanger at Felts. Felt great to get up in the air again- with all the issues I was beginning to question my purchase

  5. #15

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    Default Re: 912UL Issues

    Quote Originally Posted by Av8r3400 View Post
    I have the parts in hand to do mine now too. I hope it works as well.

    As a side note, what prop do you have? I have a 3-blade 68" warp with tapered nickel leading edges. 450 hours tt on the motor.
    I will check it out and let you know- I have no idea other than it is a warp 3 blade non nickel leading edge. I know it pulls 5200 on climb out so I think its set about perfect from what limited knowledge I have gained-

  6. #16
    Super Moderator Av8r3400's Avatar
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    Default Re: 912UL Issues

    Here is a couple of photos of the rebuild process.
    Attached Images Attached Images
    Av8r3400
    Kitfox Model IV
    The Mangy Fox
    912UL 105hp Zipper
    YouTube Videos

  7. #17
    Super Moderator Av8r3400's Avatar
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    Default Re: 912UL Issues

    The bellvue washers are 5th from the right in the last photo.

    The old ones are .2015 and .2030" thick. The new ones are .2145 and .2205" thick.

    Quite a difference.


    Skypirate: Can you give a link to the videos you found? I couldn't find any...
    Av8r3400
    Kitfox Model IV
    The Mangy Fox
    912UL 105hp Zipper
    YouTube Videos

  8. #18
    Senior Member SkyPirate's Avatar
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    Default Re: 912UL Issues

    ok will find them here is one C box ..,..will find B and E ..

    http://www.google.com/url?sa=t&rct=j...52288139,d.eWU

    B box
    http://www.youtube.com/watch?feature...&v=B_pn4XGnaHU
    Last edited by SkyPirate; 09-18-2013 at 10:18 PM.

  9. #19
    Super Moderator Av8r3400's Avatar
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    Default Re: 912UL Issues

    Okay. I did see that one. I couldn't find any for the 912 gearbox. I thought that's what you had found.
    Av8r3400
    Kitfox Model IV
    The Mangy Fox
    912UL 105hp Zipper
    YouTube Videos

  10. #20
    Senior Member SkyPirate's Avatar
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    Default Re: 912UL Issues

    still looking I know it's there..ok found one but it requires subscription..

    http://www.youtube.com/watch?feature...&v=_vs7x-cfH-U

    http://www.youtube.com/watch?feature...&v=_q-WxnWF7uk

    both above links require subscription


    it's not the one I found previously,..still looking
    Last edited by SkyPirate; 09-18-2013 at 10:26 PM.

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