Hi DJ. Does the dealer think the cold weather kit will solve the problem? My 550xp really smoothed out after about the 5th tank of fuel. The cold weather kit helped also. I did read on some other forums where early SN saws had carb problems. Just was curious what your dealer had to say.
Thanks Karla. It may just be more sensative on Autotune carburetors. I also run a 395xp that I ran felling a 65 acre plot in 4 degree weather I never did any winterization to it and never had a problem. I'm anxious to hear Tracys results.
Today I outfitted my 550xp with the cold air kit. I ran it in 3 degrees F for over an hour and had no hesitation. Hope this fixes your problem also.
Hi Tracy. I have a 550xp that has had one tank of fuel run through it so far and yesterday it was doing the same thing. The ambient Temperature was 15 degrees F when I experienced this issue. Im not certain if it was due to the cold air, or if it was due to not being broken in yet. I was told that it would take 10 tanks of fuel before it would be fully broken in. I dont have any complaints about how it runs in the cut, only the hesitation upon acceleration after an extended idle. I received the cold weather air block when I purchased my saw, but did not use it. We have some arctic temps arriving this week. I am going to use the cold air block and see if it will make a difference. Im running 91 octane Marathon gas mixed with Husqvarna XP 2 cycle oil. Im hoping someone will chime in with more information on what is causing the problem.
Look up "The chainsaw guy" on You Tube and search Husqvarna 350 muffler mod. He has a bracket available that attaches to the muffler bolts and then attaches to the 2 screws that hold the bucking spike. The bracket reduces the muffler vibration and the muffler bolts remain tight.