Question about Echo CS400 18" Chain Saw

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My Echo CS starts fine but then will not accelerate. Sometimes, after it's warm, it will work OK, but more often, it acts as if the chain lock is engaged and almost wants to stall as the throttle is pulled. It just wants to idle...... What gives??

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Can the chain be pulled by hand fairly easily? Check the fuel filter, air cleaner, and muffler for plugging. Inspect the fuel lines for decay or other damage. Make sure the carburetor fasteners are tight. Try turning the H jet needle CCW about 1/8 turn--the engine should 4-stroke when running free at speed, but 2-stroke when cutting. Hope this helps!

Posted on Jul 23, 2010

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Posted on Jan 02, 2017

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