Question about Husqvarna Chain Saw 20" Bar

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Chain is not moving, with engine running; it was working fine but then stopped. The chain oil tank was empty or thereabouts when I looked into it although when I opened the chain guard cover oil, was flowing out. Would the chain have overheated and seized?

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  • Anonymous Mar 23, 2014

    Chain moves at idle

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Take a look down the bar at the cluch.to see that the chain is running strate between the bar and cluch. I had a problem on a homelite. The cluch moved over and put the chain in a bind. had the cluch replaced to fix the problem.

Posted on Jun 22, 2009

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ARE YOU SURE THE KICK BACK BAR IS NOT ENGAGED , IF YOU HAVE PULLED IT BACK VIGOROUSLY AND STILL HAVE PROBLEM IT IS PROBABLY NOT ENGAGED , THEN THE NEXT BEST CK IS TO REMOVE THE BAR AND COVER ,LAY DOWN AS IT CAME OFF SO NO MIX UP IN RE-INSTALL WITH IT OFF SEE IF THE DRIVE GEAR IS TURNING IF SO PROBLEM COULD BE IN BAR , YOU MIGHT ALSO TRY TO LOOSEN THE CHAIN UP A WEE BIT AND SEE IF THIS HELPS , REMEMBER WEAR SAFETY GLASSES AND GLOVES AND STAY CLEAR OF ALL MOVING PARTS

Posted on Jan 13, 2009

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I'm not sure there are any "endorsed" tuning specs from Stihl as weather, temperature, fuel quality etc all contribute to engine performance.
Pictures of all types are all over the web.

As for the carb tuning procedure, maybe I can help?

Start with fresh fuel, all filters clean, and bar and chain installed. Also, fill the chain oil tank with bar/chain oil and VERIFY that the chain oiler works properly.
Initial fuel mixture settings (the H and L screws) should be 1.5 - 2 complete revolutions counter clockwise from lightly seated. Sight the carb's throttle plate and adjust idle screw counter clockwise until the plate stops moving.(Throttle closed completely.) Then go back clockwise 3 complete revolutions. This will produce an acceptable startup condition on a HEALTHY saw.
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Blip the throttle trigger and idle it down just enough to keep it running during the tune procedure.
Step 1) Using the "L" screw (closest to the engine), turn it clockwise until the engine smooths out or possibly increases RPM. Back it out slightly until the engine has a slight "LOPE" sound to it. (Like a drag car on nitro).
Step 2) Accelerate the engine to full throttle and go to the "H" screw (closest to the air filter) and slowly turn it clockwise and note the RPM increase. There will come a point when the saw will "Top-Out" and loose power. Not even enough power to turn an maintain empty chain's RPM! Go back counter clockwise to the edge of that point, and counter clockwise another fourth (1/4) revolution.
Step 3) Idle the saw back down. Again go to the "L" screw and repeat Step 1.
Step 4) Repeat Step 2.
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Hope this helps,
Dolf-

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1 Answer

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