Question about McCulloch Garden
Which idle screw are you adjusting, the idle jet (L) or the idle speed screw which sets the throttle stop position. Adjust the idle speed screw while watching the throttle stop position so that it is pushed away somewhat. Adjust the L jet needle CW to stop (lightly), then back out 1-1/2 turns CCW. This should allow the engine to idle after warm up. Turn the needle CW while running for better idle, yet it should allow the engine to 'follow the throttle'. If this doesn't work as described, then check the fuel filter, air filter, and muffler for plugging. Check the fuel lines for decay or other damage. You may need to remove the carburetor and clean it inside and out with spray carburetor cleaner. For further insight, go to: http://www.drystacked.com for a 12 page article on Walbro brand carburetor theory and troubleshooting. This material applies in general to other brands of carburetor as well. Hope this helps!
Posted on Sep 13, 2010
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Posted on Jan 02, 2017
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