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Hot!McCulloch MAC 4600 (46cc) Chain saw

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wallacetom
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2016/05/18 09:01:54 (permalink)
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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.

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    Pepsiboy
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    Re: McCulloch MAC 4600 (46cc) Chain saw 2016/05/25 08:17:16 (permalink)
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    wallacetom,
    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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