Originally Posted by Nutsedge
What leads you to believe that? Four strokes run at a lower rpm hence lower temps and the oiling system in a four stroke allows for much better lubrication.
I have actually never read that 2 strokes last longer and actually that four strokes across the board last much longer.
Then their is the torque of the four stroke and the overall increased efficiency the combustion process promotes.
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That's all great in theory, but maybe you should ask why there are NO commercial operators using 4 strokes.