This is probably a silly question, but just what the heck is the differance between a 40 and 50 2-stroke mercury? The specs in the catalogs are identical. I have a 2000 40 hp, and when I asked a mechanic this winter, he was vague, and basically told me to buy a 50. Well now, I can't do that, and I might not really want to, but if the weight is identical, and the crank and pistons are the same, what is making the engine more powerful? Thanks.
