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  1. #1
    Moderator beerdart's Avatar
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    Throttle Stop Screw?

    I have a TP that some jackwagon messed with the stop screw. Anyone know the factory blade angel setting.


  2. #2
    Chris crisistc's Avatar
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    Fully open, lol,
    I could tell you if I had my TB back from Florida, Should be here today I think

  3. #3
    Moderator beerdart's Avatar
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    K if you can give me the opening distance that would be great or ill have to pull one off a ski.

  4. #4
    Steve, I just pulled a TB off one of our development stands, and measured the opening. Using a very narrow feeler gauge, I measure the opening at the top or bottom of the butterfly at .008".

  5. #5
    Mothman's Avatar
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    What blade? Mine is a gaping cylindrical hole...
    Push button, hold on. It says start/stop. Is there an in-between?
    Thaaat's why no one likes me to pull them on the inner tube.

    I thought the the butterfly remained closed and the idle bypass opened to allow enough air for idle only. My butterfly seems to be fully closed, but I haven't looked at it while running. It idles @1800 in the water too.
    I'll check with a feeler this weekend.

  6. #6
    Chris crisistc's Avatar
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    The throttle position screw is just under 1/2 inch from edge to edge. I hope this picture helps.


    Click image for larger version. 

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    I'll be back I am going to run to wall-mart (Wall of China) and get a metric micrometer. those pics are lame and don't seem like they can really help.

    Edit: Wall of China has everything someone else needs, just nothing that I ever need, WTF

  7. #7
    Chris crisistc's Avatar
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    Oh heres to the new looking TB soon, = )
    Attachment 273817Click image for larger version. 

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  8. #8
    Moderator beerdart's Avatar
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    Thanks that should get me close.
    Quote Originally Posted by Sea Dood View Post
    Steve, I just pulled a TB off one of our development stands, and measured the opening. Using a very narrow feeler gauge, I measure the opening at the top or bottom of the butterfly at .008".
    Quote Originally Posted by crisistc View Post
    The throttle position screw is just under 1/2 inch from edge to edge. I hope this picture helps.


    Click image for larger version. 

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ID:	273809Click image for larger version. 

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    I'll be back I am going to run to wall-mart (Wall of China) and get a metric micrometer. those pics are lame and don't seem like they can really help.

    Edit: Wall of China has everything someone else needs, just nothing that I ever need, WTF

  9. #9
    Quote Originally Posted by Mothman View Post
    I thought the the butterfly remained closed and the idle bypass opened to allow enough air for idle only. My butterfly seems to be fully closed, but I haven't looked at it while running. It idles @1800 in the water too.
    I'll check with a feeler this weekend.
    No, the throttle butterfly is just slightly open when the throttle screw is against the stop. They flow test these to a certain (small) flow. This slight opening plus the adjustability range of the idle bypass valve gives them the range needed to control idle properly, as well as sync the TPS with the blade angle for the fuel mapping in the ECU. Since you cannot replicate the flow test, I think the best way to get the mucked-up TB back to stock is to open the butterfly very slightly; that is why I measured it with the feeler gauge. Note that a standard width feeler is pretty wide and a .008 wide blade doesn't bend very well, so you need to be careful to make sure that if you use a standard blade that you put a lot of pressure on the shaft to bend the blade.

  10. #10
    krouchchocolate's Avatar
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    I also took some pictures. Just click on the pictures to enlarge it.




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