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Old 03-04-2008, 08:42 PM
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Default RE: Quadra 52 won't run under 3500 HELP

Back to basics..... Remove the carb, check that the buttery is installed correctly. The butterfly is NOT round but oval and has beveled edges for correct sealing at low speed operation. Unscrew the idle speed screw untill the throttle arm does not touch. Hold carb up to sun and see if any light leaks past the butteryfly, light leaks = air leaks = fast idle.