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Thread: 85 250sx - carb with no pilot screw?

  1. #1
    Join Date
    May 2008
    Location
    Blackstock, Ontario, Canada
    --
    89

    85 250sx - carb with no pilot screw?

    Just picked up another 250sx that has seen better days. Have cleaned the carb and am surprised at the lack of a pilot screw. This is a first for me. Rebuilt my other sx and es carbs, and a few fourtrax carbs, all with pilot screws. It appears to still be a qa02a. Has anyone seen this before? I couldn't find anything after an hour of searching.
    Attached Thumbnails Attached Thumbnails 20190808_104926.jpg   20190808_104913.jpg  

  2. #2
    Join Date
    Apr 2014
    Location
    Edmond, KS
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    2,531
    Is it possible that you have to remove the plug at the engine side of the carb bowl where the pilot screw usually is?

  3. #3
    Join Date
    Aug 2005
    Location
    CT
    --
    206
    Yep, should be under that plug. He careful drilling it, don't ask me how I know.

  4. #4
    Join Date
    May 2008
    Location
    Blackstock, Ontario, Canada
    --
    89
    Thanks for the replies guys. If there was a screw under there though it wouldn't be like the other carbs I've seen...Click image for larger version. 

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  5. #5
    Join Date
    Jul 2009
    Location
    South Florida
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    6,722
    My guess is that is a replacement carburetor from the mid to late 2000’s when the carburetor was still available from Honda .
    That’s about the time I started seeing those caps over the air fuel mix screw .
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  6. #6
    Join Date
    Aug 2005
    Location
    CT
    --
    206
    It's not under here?
    Attached Thumbnails Attached Thumbnails 20190808_104926.jpg  

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