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Bing carb breather/over flow

in General Tech Discussion 13 years ago

  • Re: Bing carb breather/over flow

    by » 13 years ago

    I attached new vent hoses and ran them into the back ends of the air filters. I have been running this way now for about 50 hours and it seems to operate well. I believe it was Roger Lee that suggested this.

    Don Hudgeon
      
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  • Re: Bing carb breather/over flow

    by » 13 years ago

    This idea is slightly "off topic" but I was having occasional difficult starting when the engine was warm. I took off the top cowl and the carb bowls were VERY warm (even with wrapped exhaust pipes). I have now attached a piece of flexible heat shield purchased at our local auto supply. These shields are zap-tied to hoses at the engine side and go under the carb bowls, attaching to the outside of the carb top. They completely deflect all the heat away from the carbs and I have had instant "hot starts" every time. It was a $30 fix, easily removed for maintenance. These shields are designed to wrap starters on performance cars.
      
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  • Re: Bing carb breather/over flow

    by » 13 years ago

    Hi Don,

    Do you have carb drip tray's installed?

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

      
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  • Re: Bing carb breather/over flow

    by » 13 years ago

    No drip trays.
      
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  • Re: Bing carb breather/over flow

    by » 13 years ago

    Drip trays should be installed for two reasons. The first and biggest reason is a safety issue to help keep fuel from dripping on the hottest point on the exhaust tube and catching fire. It is common for the carb bowl gaskets to leak. I have one in the shop right now from California and when I pulled his cowl he had live fuel in it, but it kept it off the exhaust. If you have a full open air engine the air flow will keep the fuel blown off and you'll never know if your bowl gasket leaks. At idle and taxi it may be a problem. I had a powered parachute in last month and it was pouring fuel on the hot exhaust and the guy never knew it. This was caused by the carbs being out of sync by 7" of vacuum and shaking so bad it was puking out the vent tubes. The other thing it will do is help shield a little from the radiated heat off the exhaust tube. This is more help fuel in a cowled engine. The open air doesn't even figure into this for heat protection. header wrap will help greatly with radiated heat on the carbs and all surrounding structures, hose and wiring. If you are using the stainless exhaust then carbonization is not an issue.

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

      
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