From: "Mark Smith" To: Subject: Re: UL: summer carb adjustments help Date: Saturday, July 22, 2000 7:19 PM Roy Simons wrote: > > Summer is here and the Rotax 377 on my Quicksilver MX is starting to run > rough at idle. I have a Bing 54 carb. I can tell the motor is running rich. > I pulled the needle valve and it was set to the leanest notch (Top). I tryed > to set it to notch two but of course, I got a richer running motor. I set it > back to the top notch. According to the CPS book I have the right needle > jet, jet needle, and main jet. One thing I do know is ever since the weather > has warmed up it is running worse. I do understand the warmer weather > effecting the air-to-fuel mixtures in the carb. Could one of you give me a > hand on the proper procedure to adjusting my Bing 54 carb for current > weather condtions? > > Thanks > Vance > > _______________________________________________________ > Say Bye to Slow Internet! > http://www.home.com/xinbox/signup.html very possibly, you are changing the wrong thing for idle adjustment the idle is only concerned with the idle jet which you did not mention at all as to the proper size. it should be a 45 also, check and see that it is clear and you can see through it, they often get plugged while in use also, the rough running and richness that you are seeing may be due to the large screw being screwed in so far as to have the engine idling on the needle, which you have leaned in an attempt to lean the idle mixture, changing this clip setting is a midrange change, not an idle adjustment, unless,,,,,,, you are running with a plugged idle jet !! -- Mark Smith mailto:trikite@evansville.net Tri-State Kite Sales 1121 N Locust St Mt Vernon, IN 47620