I go to that excellent dealer in northern MI, too, looking forward to a visit on Monday on the way to a job. And to buy another AutoTune. I recently gave an older saw in the same 50cc class to a friend of mine who has a small fleet of the exact same model still, and refuses to touch an AutoTune. I think he is making a mistake because he runs 3 or 4 of them with a small crew, just dropping trees all day long on pre-commercial thinning type jobs. No stopping for loading or anything else, just keep dropping stems. I say a mistake because once I ran my 50cc AutoTune and it's normally carb'd predecessor on a similar job - same job on the same day - I saw clearly the major advantage in fuel efficiency - which is not just in fuel costs, but in time, which is of course, money. This also means I don't have to carry as much fuel on a sweet little lumbar supported lower back pack I use. But as has been said, for cutting just a couple-three tanks a couple-three days a month, that matters little.
I had a rough go with a Stihl "solenoid" -
(
noun
- a cylindrical coil of wire acting as a magnet when carrying electric current.)
- how a black box that controls fuel fed into a carb got that name I will never understand. I feel it still runs too rich - using a spark arrestor screen with it is not really an option, unless you want to clean that screen nearly daily if you run the saw all day. (Which my no comprende dealer of the German stuff thinks would be a perfectly fine thing to do.) But overall my first M-Tronic has been great, a total Beast, ever since it's mysterious teething issue was cleared up. I was left with the impression the dealer didn't know what was happening either - and the customer isn't allowed to peak behind the cable very much, most places.
It makes me think what these systems could use for even greater improvement would be what is called an O2 sensor on a vehicle, as a bit of a check on how the system is operating. But I suppose that would still add too much expense and complication to these systems, which in general seem to be working fine without additional sensors. My first AutoTune is over 800 hours now (I do like how the chip keeps track) and should be over 1000 by some point this Fall.
I get asked about buying saws sometimes, and I just tell people two things: buy the "pro" model, and buy it from the place where the loggers buy theirs, even if that place is a little farther away.