Hello folks, this is my 1st post on Forestry Forum.
I want to start by saying that I am the proud new owner of 3 Husqvarna 576XP AutoTunes. 2 are 122 and 126 models built in the 34 wk of 09, the 3rd is 268 model in the 40wk of 09.
I was informed there have been some lean seizures on the 1st tank of fuel and I was recommended to run the saws WOT right out of the box for the 1st 5 minutes in the biggest log possible. Doing this resets the saws computers from the lean carb settings that they got during run in at the factory, which was done to meet the new emission standards.
After the sawdust settled from bucking up 24"-36" frozen white spruce at WOT for 5 min. with a 32" b/c, the 3 saws sat there idling in perfect tune without missing a beat. I'm very impressed how well their autotune setup works and the cutting speed these saws put out.
In the 36 plus years I've run saws I've never had a factory stock 70cc class saw pull a 32" chain like these ones do in big wood. Let alone running a 32" b/c on a saw this small. I think Husqvarna did their homework on this chainsaw. Very strong powerband from bottom up. Very peaky at WOT with a slight bit of safety barrier breaktone. For a brand new saw it gets to WOT from idle very quick too. We'll see how the precise tuning stands up in future use.
I compared the 576 to my 372 and from looking at the 2 saws without using a tape measure, the only difference in size I can see is the 576 has a slightly larger airfilter cover. Weight differences I can't tell a difference from holding the 2, but then maybe the 372 has more oily sawdust on its self.
Willard