Question about Poulan Pro Chain Saw 46cc 20"
I have an old john deere chain saw.It was running fine a few days ago and i can not get it to start now.I am thinking it might be a fuel problem.I took the carb apart and cleaned it up.It has 2 adjustment screwsI am thinking they have to be backed off 1 and a half turns.Can someone tell me if that is correct.I did all this but I have not tried it yet, because I want to get some fresh fuel.If anyone has any tips for me I sure would appreciate it.
The H is for high rpm (Main mixture) and the L is for Low rpm (Idle Mixture). First turn in both screws all the way in and then turn them both out 1 and a half turns. Pump the primer bulb if the equipment has one. Start the engine, once it is idling, turn the L (Idle Mixture) screw out (counterclockwise) from the preliminary setting until the engine speed decreases (rich). Note the position of the needle. Now turn the adjusting needle in (clockwise). The engine speed may increase, then it will decrease as the needle is turned in (lean). Note the position of the needle. Set the adjusting needle midway between the rich and lean settings as in the picture below. Don't touch the throttle during this procedure. Once you have found the best idle speed for the engine then you need to adjust the high rpm. This process is the same as with the idle rpm process but you need the to hold the throttle wide open while you are adjusting the H (Main Mixture) needle on the carburetor.
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Posted on May 11, 2009
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Posted on Jan 02, 2017
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