Wayne Sutton wrote:Yep, there are some 10 cube 90's around. I have heard a variety of stories explaining their existence.
I have one that I bought in a box. It had came from Australia and the owner said that about 10-12 were distributed in the US and about the same number in Australia. They were all sucked up by the racers and so the results of the "test" were not sufficient to support full production.
In other accounts I have heard that STIHL did not have anything to do with them and that they are a mule created by the racing boys.
They have a removable head and the transfer ports align with the channels that are in the bottom end of all 090's. That alignment tells me that they are real and some part of the STIHL testing and development. I would guess that the reason it did not end up as a standard item is that with a piston of that diameter it is real easy to stick an engine from over speed. And, as everyone knows, most end users like to lean out their saws and get every thing out of them that they can.
I'll get a picture of the one that I have and post it. It looks just like a normal 090 except the compression release is in a different location.
thechemist wrote:I think there is a 10 cube 090 on ebay.com.au at the moment. It has the decompressor button in the same place as Waynes saw. Could it be so? do a search on stihl 090av in ebay.com.au and see for yourself
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