McCulloch MAC 4600 (46cc) Chain saw
I have a McCulloch MAC 4600 (46cc) that is hard to start or when it does start it runs wide open. I cant' get to the L or H needle jets to adjust them because the engine does not run long enough to. It has a Walbro Carb WT-334-1 which i rebuilt using Walbro Kit K20-WAT. The fuel line, primer bulb and primer bulb lines have been replaced. Also replaced was a inpulse line which runs from the engine to the carb. I have set the Low and High Needle jets to 1 1/2 turns out and the idle adjustment screw all the way in. Any recommendations to correct the problem will be greatly appreciated. Even though it is an old saw I believe it still has alot of life left in it.
Re: McCulloch MAC 4600 (46cc) Chain saw
Turn the idle speed screw OUT until the throttle is completely closed, then turn it IN until it touched the carb. Then turn it IN about 3/4 to 1 turn. Start the engine and adjust mixture screws and idle screw as needed. This is the way I did it when rebuilding my carb. Just my $.02. Dave
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