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  1. #1
    Join Date
    Aug 2019
    Location
    Arden, DE
    Posts
    27

    Default 90-WME-62 carb threaded hole empty?

    Can anyone tell me if the threaded hole next to the Idle Needle in the 90-WME-62 is supposed to be empty? Or, is it suppose to be closed with a set screw or something? It seems that when the engine is in the tilted up position, I get fuel leaking.
    THanks,
    Denis
    Last edited by pyrodenis; 05-11-2021 at 02:10 PM.

  2. #2
    Join Date
    Aug 2019
    Location
    Arden, DE
    Posts
    27

    Default Re: 90-WME-62 carb threaded hole empty?

    Quote Originally Posted by pyrodenis View Post
    Can anyone tell me if the threaded hole next to the Idle Needle in the 90-WME-62 is supposed to be empty? Or, is it suppose to be closed with a set screw or something? It seems that when the engine is in the tilted up position, I get fuel leaking.
    THanks,
    Denis
    So, to refine my question, it is a vent hole. But is there a reason it's threaded, if nothing goes in it?
    Denis

  3. #3

    Default Re: 90-WME-62 carb threaded hole empty?

    They used to have jets in those threaded holes , BUT with certain weather conditions they would ice up.
    The factory just left them out (some reason still carried on threading the holes) ? I saw a mercury bulletin 20 odd years back.

  4. #4
    Join Date
    Nov 2011
    Location
    tennessee
    Posts
    5,003

    Default Re: 90-WME-62 carb threaded hole empty?

    That is the fuel bowl vent...depending on HP some have jets .
    Pappys Sales and Service
    Owner and Factory Certified Technician
    Former racer KDBA (Kentucky Drag Boat Association)

  5. #5
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    17,133

    Default Re: 90-WME-62 carb threaded hole empty?

    I've un with and without them--no difference.

    Jeff

  6. #6
    Join Date
    Nov 2011
    Location
    tennessee
    Posts
    5,003

    Default Re: 90-WME-62 carb threaded hole empty?

    There is a difference as some HP have em and some dont.
    Pappys Sales and Service
    Owner and Factory Certified Technician
    Former racer KDBA (Kentucky Drag Boat Association)

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