Backfire out the carb? or timing out?? did you have any clutch work done recently? check the flywheel key, maybe the clutch was taken off with a impact gun. backfire out of the carb look up spark screen in your manual or Husqvarna's website (their free manuals)
SOURCE: need to know gas to oil ratio jonsered 535 chainsaw
50:1 is the mixture for the Jonsered 535. I bought mine new around 1991 and it's been a great saw.
SOURCE: how to adjust chain and bar oiler flow
The chain should be adjusted so that the chain can be pulled by hand fairly easily, but doesn't droop from the bar underneath. Oil flow should be set so that a running engine (chain moving fairly fast) will send a thin line of oil off of the tip of the bar (onto a piece of cardboard) with a few moments of running. Hope this helps!
Testimonial: "Thanks for advice about oil flow !adjustment needed I think !!"
SOURCE: the chain on my Jonsered
The chain on a chainsaw expands during use.This is caused by the heat generated by friction with the timber being cut. The chain should be monitored during use and the slack taken up by the tensioning adjustment screw or knob. You may have to loosen the nuts holding the bar before doing this and then tighten them securely. If these nuts are loose the chain can become slack. If you give me the model of the chainsaw I can try and find a manual and check the tensioning procedure as newer models of chainsaws have either automatic tensioning or have a thumbwheel arrangement for doing this.
Testimonial: "Thanks, great information, worked well this morning"
SOURCE: fuel to oil mix for jonsered 490 chainsaw ?
its a 50 - 1 mix of 2 stroke oil to fuel or 2 1/2 ounces of oil to 1 gallon of gas
SOURCE: I have a Jonsered 20"chainsaw.CS2165
The hand guard is secured on the left side with the top l/h starter cover screw part no. 503203419, the right side is held to the brake actuating arm with a 4mm screw part no. 503202512.
Let me know if you need other parts.
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