Geochurchi 3 #1 Posted May 14, 2016 Hi, can anyone give me tips on adjusting a carb? Newly rebuilt,will start but runs only while holding the throttle in,how am I supposed to adjust L&H screws to get this thing to run correctly,screws are backed out 1 1/2 turns which is supposed to let it start and run. I hate adjusting carbs! Share this post Link to post Share on other sites