Unpleasant Surprise
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  1. #1
    Senior Member DrTerrible's Avatar
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    Unpleasant Surprise

    To diagnose my neutral switch I am drawing my oil to remove my engine cover when I find this in the bottom drain screen. IMG_0122.JPGIMG_0122.JPG

    I'm worried...should I be?

  2. #2
    Senior Member socalnative's Avatar
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    Well at least it doesn't look like it's been jammed in anything important.

    What diameter is it?

  3. #3
    Senior Member DrTerrible's Avatar
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    9.25mm x 3.78mm x 5.26mm

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  5. #4
    Senior Member TW-Brian's Avatar
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    It looks like a Woodruff key that has been sheared off. I thought that it might the one that secures the flywheel to the crankshaft, but that one (shown below) is larger than the one that you found. I am not aware of any other keys like this used in the TW engine. You may want to remove the bolt on the flywheel and check to see that the one securing the flywheel is still in place.

    Could the correct key have been replaced by someone who used a smaller one that then sheared off?

    I'd be a little worried. . . . . . . .

    IMG_2299-1 (2).jpg

  6. #5
    Senior Member elime's Avatar
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    The upper picture looks like a broken gear tooth to me. Someone has been shifting your TW with great authority.

    When I see one tooth like that I think there are probably more.
    Last edited by elime; 03-28-2017 at 10:04 PM.
    Long live the internal combustion engine!

  7. #6
    Senior Member DrTerrible's Avatar
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    I will have to google woodruff key because I have no clue what it is and have no idea what the previous owner did to this thing.

  8. #7
    Senior Member elime's Avatar
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    Brian -- If you have any gears easily accessible try measuring the width of one and see what it is. Tony
    Long live the internal combustion engine!

  9. #8
    Senior Member DrTerrible's Avatar
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    I checked the gears on the left side...none missing. I do remember last summer the kickstart went a little wonky when the guide clip broke. Guess I will remove the right cover tomorrow and check.

  10. #9
    Senior Member TW-Brian's Avatar
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    Quote Originally Posted by elime View Post
    Brian -- If you have any gears easily accessible try measuring the width of one and see what it is. Tony
    Good call Tony, it does look like a gear tooth. I checked a starter motor, the starter gear and the teeth on the flywheel. None of these match the size of the broken piece. That just leaves the gears either inside of the crankcase or under the right side cover. Too late for me to check those tonight. Besides, how could the broken tooth migrate to the left side of the engine?

    Dr Terrible, did you find this piece in the mesh cup under the oil drain plug or loose inside the left side cover?

  11. #10
    Senior Member DrTerrible's Avatar
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    It was loose I'm sure. Going to take
    e the left side off to do a little more digging.

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