Its really interesting the wide array of experiences with small engines and gasoline. In my case maybe I run the small stuff enough, even the seasonal ones, to combat any issues with fuel and carb problems, for many years I've never had much trouble, though my snowblower gave me a fit one year, carb issue, figured I'd have to open that one up, but it was a fuel issue and resolved itself, runs like new and just like when I got it in '02.
I run Stihl 2 cycle 50:1, my saw and trimmer are fine with that, I am very careful to swish any remaining oil out of the container with a little gasoline and make sure to measure or not overfill the 50:1 container with gasoline, being that is a little leaner than the 40:1 that was more common before.
I use 93 or the highest octane fuel, but mix Startron additive into it every time, just for the small engine equipment. My Stihl saw seems to be fine with it. I don't know if the Startron is a snake oil, or something common repackaged, but in things that sat for one year, my tiller started on 1 pull, with the choke on, of course these are stored in a heated garage too. Old ford ranger has 1 year old startron treated gas in it, starts just fine.
With the 2 cycle engines, I know lean mixes and running the heck out of them in hot weather and or similar can be detrimental to engine life, but with mine I don't run em flat out full throttle, yet I don't lug em down and load em up either, kinda clear em out every so often with some brief high RPM under a load, seems to work.
I don't recall any issue using higher octane fuel, a Stihl rep mentioned it was fine with the saw, seems to start easier, though it is tempermental sometimes, I put in a new fuel line, likes to shut off sometimes, but it has to be the saw, fuel or spark problem to sort out, not the fuel. I can't find any ethanol free fuel here anymore, but I really never had much trouble with E10, some fuel lines in older equipment failed, but it might have been more of an age thing, really hard to say what is what with all of this, but from reading.
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Today's Featured Article - A Cautionary Tale - by Ian Minshull. In the early 1950s my father bought an Allis Chalmers B and I used it for all the row crop work with the mangolds and potatoes, rolling and the haymaking on our farm. The farm and the Allis were sold and I have spent a lifetime working on farms throughout the country. I promised myself that one day I would own an Allis. That time event
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