Originally Posted by Duekster
The 4 mix is a two stroke of a sort. .
With four distinctive parts in the cycle, how can it be a "two stroke of sort?" I see nothing in the operation of a 4-mix design that has any hint of being a two stroke engine.
I don't doubt that dealers are telling unsuspecting customers that it is a two-stroke. I can even verify this. While standing in line at the local Stihl dealer, the man in front of me had just bought an FS90R trimmer. He explained the mixed fuel requirement. And, in the process, said something to the effect that it is a two-cycle. I could not keep quiet, "... this is a four cycle engine." The salesman sneered and ignored. He knew good and well he was deceiving the customer, not wanting to place any doubt in the customer's mind.
When the unsuspecting customer left with FS90R in hand, and I stepped to the counter, I said "you lied to that man." He chose to talk about "mixed fuel." I stated to him that mixed fuel only was the lubrication system of the engine, but having nothing to do with the combustion cycles. He walked away, and somebody else helped me with my order.
I think the man knew what he was doing, but chose to lie. So, a dealer telling somebody "two cycle of sorts," he/she is doing the same thing, not wanting to kill a sale. Combustion cycle designs are independent of lubrication system.