This thread may die and the saw might end up in the scrap heap. Not much has changed. saw still runs the same even at a mile lower in elevation --around 4800' give or take (didn't bust out the topo map)
I've contacted husqvarna "customer support" again and the nice lady took a little more information and said that she would 'elevate' this to the next level and that it would take something like 48 hours before I'd likely hear back (that was two and a half days ago)
I found a dealer an hour and a half away that seemed really good over the phone and is willing to take a look at it, but doesn't have any of the autotune diagnostic stuff. I'll run it that way Monday and see what he has to say if I haven't heard back from Husky.
Good suggestion Adirondackstihl-- if husky and my semi-local dealer don't pan out I'll send it to a sponsor here.
Komatsuvarna-- I did back that screw out a 1/4 turn and no improvement-- don't want to delve in much farther by myself being a consumer-- I'd very likely mess something up that wasn't broken.. I think that screw might be much like that is what is on the 562 as per this post.
The Autotune controls one solenoid. Like standard carbs, the low pressure flowing over the main nozzle shifts the fuel draw to the high side. The AT learns to control this transition through the Throttle Position Sensor. Knowing when the pressure changes passages in the range to alter the fuel flow at the solenoid.
Bog at idle can also be caused by a rich condition. To test for this, let the saw idle for three to five minutes. If it loads and blows smoke/unburnt fuel, its rich. Possibly the needle isn't seating proper or the pop off was adjusted to much. The condition this fixes is a lean one. From the factory some of these carbs throttle butterfly is sealed to tight, not letting enough air past. In turn, the AT leans the mixture to attain the proper idle speed. If one is to let more air by, more fuel is necessary to maintain the same idle. The 550/545 Walbro carb has a bypass adjustment screw.
550/545
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mweba1, on Flickr
Untitled by
mweba1, on Flickr
In
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mweba1, on Flickr
Out
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mweba1, on Flickr
that 562 thread is interesting..
contacted Terry and may end up with the diagnostic tool-- more curiousity on my part to get it it should allow me to see hours run, numbers of starts, H setting, and perhaps if I'm lucky an error code.... won't be able to flash the saw or get the latest software, but for the price and as a curiousity I'll take it even If I learn nothing.