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  1. #1

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    .65LA preset for airbleed

    Our youth flying program recently had a plane donated that was equiped with an OS .65LA. We don't know the history of the engine, but it seems quite new (good compression, turns smoothly), but we haven't been able to get it to run smoothly. It seems to be running very rich on the low end (lots of smoke, loads up) even though our engine "guru" opened the airbleed fully. I am taking the carb apart today and cleaning it completely to preclude blockage, but I need to know where to preset the bleed screw when I reassemble it. I'm anxious for an answer as we intend to pass this plane to a very deserving student ASAP. Thanks in advance for any assistance.
    I don\'\'t enjoy getting older, but it sure beats the alternative.

  2. #2
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    RE: .65LA preset for airbleed

    The starting point for an airbleed screw is to set it so that it blocks 1/2 of the airbleed hole.

    You get the high-speed needle set first at full throttle, then work on the idle speed and mixture. Too often, people try to get too low an idle RPM, which causes a multitude of problems. Anything under 2,500 RPM is good.
    Bill Baxter, Manager Hobby Services/Futaba Service/North America
    3002 N. Apollo Dr. Ste. 1 Champaign, IL 61822 USA
    Service Phone: 217 398-0007
    Email: hobbyservices@hobbico.com

  3. #3

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    RE: .65LA preset for airbleed

    Thank you for the info. I hope to get this engine tuned and running smoothly today
    I don\'\'t enjoy getting older, but it sure beats the alternative.

  4. #4

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    RE: .65LA preset for airbleed

    Bax,
    Thanks again for the info. I reassembled the carb, got the engine running and after setting the HSN, it took only 1/2 turn to get the mixture set. That engine screams on the top end and the idle is smooth as silk. I now have no problem giving it to a new young pilot. Your assistance made that possible.
    I don\'\'t enjoy getting older, but it sure beats the alternative.


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