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Bing 64 throttle arm in wrong position

in General Tech Discussion 11 years ago
I just got my carburetors back on the plane after a local mechanic rebuilt them. He's Rotax certified. I think he put the throttle actuator arms on wrong. They have very little travel to the stops at full throttle position on the bowden cable and a ton extra at the idle position. the heavy maintenance manual doesn't exactly address the build sequence for the carburetor. I have an old set of carbs on the shelf and they are definitely different. Can I just remove the one nut holding the arms on and turn everything around?
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  • Re: Bing 64 throttle arm in wrong position

    by » 11 years ago

    Yes he put it on upside down. Take the nut off and rotate the arm 180 degrees so it looks like your old carbs. Then prey he didn't do something else wrong on the inside. I don't see how someone could make this particular mistake.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

    Thank you said by: jay white
      
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  • Re: Bing 64 throttle arm in wrong position

    by » 11 years ago

    Send them to another Rotax trained mechanic and get him to strip and rebuild them. If he has done that he could have done anything wrong. I would send him the bill for the rebuild or get your money back from him.

    This is a joke!

    Who was it?

    Mark
      
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  • Re: Bing 64 throttle arm in wrong position

    by » 11 years ago

    Hey Roger, I took off the arms and it appears that they are right and left particular. I switched them and am starting the mechanical sync. Everything else looks ok but when I have my first start, I'll know for sure. can you put anything in the carb body upside down, backward, or otherwise wrong? The parts diagram and the rebuild sequence there looks pretty straight forward.
      
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  • Re: Bing 64 throttle arm in wrong position

    by » 11 years ago

    Hi Jay,

    Yes there are items that can be put in wrong. I have seen chokes turned 180 degrees: butterfly's put in backward, upside down tilted the wrong way: diaphragms put in wrong: "O" rings twisted and cut: wrong float levels and wrong needle clip positions.

    Did I mention they forgot to wipe their greasy finger prints off too. :silly:

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: Bing 64 throttle arm in wrong position

    by » 11 years ago

    Jay

    It's no skin off my nose if you take my advise or not, but if it means more to you I am sure Roger would agree that they should be checked.

    Next time you are on a full power climb, just after take off, with no where to go, the last thing you want is something to go wrong.

    You have the chance to have them checked before you re fit them.

    I know what I would do, its a no brainer.

    Mark

    PS The carb flange bolt looks like it may be a bit short.
      
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