John,
are you looking at a carbed or injected two stroke ? If carbed will it be oil injected? Will the kicker be oil injected or pre mix? The 50 two stroke will woop it up on the 40hp four stroke and if one of the fuel and oil injected motors will give about the same fuel economy. If both the kicker and the main motor are pre mix or both straight gas then you could run both motors off one tank if you keep both motors the same. Would help keep the clutter down in the boat.
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