Question about Husqvarna Chain Saw 20" Bar
Remove the bar and chain--check the oil port in the side of the engine case where the bar fits up to. Start the engine--oil should ooze out of the port. If not, service the pump, lines and tank filter. If oil does ooze out, clean the chain groove, and the two oil passages that feed oil to the groove. If the outsides of the chain groove have flared out from chain wear, file these edges off (about 45 degrees) til they don't project beyond the bar vertical surface so that they don't catch on the kerf cut. Make sure the chain is being sharpened and adjusted properly. The 'choking down' may be from the engine overheating while trying make the cut. The engine should 4-stroke when running at speed, but immediately 2-stroke when cutting. Make sure the air cleaner and muffler are not plugged. Hope this helps!
Posted on May 04, 2010
Bar might be bent, rakers between the cutting teeth need filed down or one side of chain is sharper than other
Posted on Apr 10, 2013
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Posted on Jan 02, 2017
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