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Yanmar also had a few Wankel saw models.

They are fun and my twin and me had an ongoing disagreement for some years. Its resolved now. Not many saws with two in line cylinders were made. Even less series produced. There was more models in two man saws in various brands. Boxer engines like Echo had there was more. I can't remember...

This is my Solo Twin...

I doubt that was just this model, most don't do well with the gas today. Oxide, erosion, water.. Very common today regardless of model. Plastic membrane carbs are a bit less corroded, but they need new membranes every spring or every other... My favorit saw this week... Solo Twin!

Here the fuel in gas stations is not an option for those running saws daily. Its too much repairs and costs IMO. When you have a look around it isn't any problem to see what is most cost efficient, most people figure it out pretty fast. There is those that think premixed is too pricey, not many...

Motomix we have here. Its Stihl brand and should be same everywere if I understand correct. Aspen we have as its made here and used by 90% of the users today. It was Husqvarna brand, but now they have their own. Pump gas is proberbly the worst in the world... There are differances in Motomix...

It is not the fuel that do this, its the oil in the fuel. Its an penetrating oil thar gets in under and as it gets loose burns and hopefully get out. If not it turns in to stone hard marbles that shake about in engine and eventually find their way in between piston and cylinder. Then it's nighty...

If they complained about bad dealers 10 years ago, they will not be happy ten years from now with no dealers... Today the hardest part in buying is not were to find it but the choice of product and the stuff for it. What product that works best... No internet shop or dealer page will tell you...

Well today its not so much about running a product an long time, its more buy and toss ideas that rule any way. Buy several saws on internet, save 50 bucks/saw and throw it away when it brakes. No need for dealers shops and increased sales of new products. It the modern way!

You don't have Husqvarna/Stihl saws in box stores?

Actually when you try E85 they run cooler. Hard part of this is to find oil that mix well. As you say all gas more or less has ethanol were you are I think I would try. So you have same issues either way (corrosion, water etc). Here its not easy to find E85 anymore as it was not such a great...

You thing Alcohol is the bad thing? You are wrong.

Well, even if they are anal about it, it does not help to know what is what, really. There was a test here a few years ago were they ran saws on E85. I know there is a couple experimental runner using it now too. Hardest part is to find oil that mix well with it E85.

In a flushed two stroke there is a few things we can't do much about. One of those things is the expansion of ignited fuel/air mix. Flame take a certain amount of time and for all to burn as it expands it needs time to do this. Chances of it burning more is higher at 8000rpm than 18000rpm...

No, the older saws was not dirtier if you look on the environmental impact they had. Emissions is not effecting our environment nearly as much as production. Old saws in late 80's and 90's could easily be run 2500hrs runtime on an 254 as example. Today you need two or more 550's for same run...

New strato saws are heavier, less grunt more rpm and more sencetive to airleaks as they have one from start.

I tried and know. Not so hard for you to try and know either. I can tell you haven't as you say you take the whip. I have a couple hundred one and two man whip's. I learned to file them and Learned from guy's here that used them in forest work. As the saws got better and loggers started to...

Small displacement geardrive saws don't have much chainspeed. Take Mac 33 series as examle, even slower chainspeed than XA/XB... It was faster cutting than most did with wip saws at the time. They could work more hrs too. Larger pile at the end of day, more €£$ in wallet!

Well, I bet you find more on Youtube if you look again... Here is one: They sound the same on gasoline as this. But run hotter, less smoke. You still need lubricant regardless of fuel.

This pic is of Marshal Trovers XC, never run. There is one more in US I know of. You can run XA/XC on just about anything as said. You need same gasoline mix in XA as XB, all engines need lubrication. No flushed two stroke can run without lubrication, diesel, gas or other.... 8/1 with gas, 4/1...