First off, the motors are made in Wisconsin, not China. I've got one and and it's a great motor. The motors you see on the Bass Pro (Tracker) and Lowe package boats are the Mercury 2 strokes, which are comparatively "old" technology. Mercury wants to emphasize their Optimax and Verado lines, but sells a pile of the 50, 90 and 115 two strokes to boat manufacturers for their package boats. Many of the boat makers are also owned by Brunswick (Lowe, Lund, etc.), creating a direct pipeline.
If you look
http://www.mercurymarinelatinamerica...ry_2stroke.htm, you will find the specs on these two stroke engines.
Cheers, Gary