I cannot comment on the e-tec but here's what i can tell you.
I restored mine spring of 2012. Found a deal on a new in crate 2005 yamaha 115 2 stroke carb'd motor. Didn't really want to buy it (thought it was underpowered) but couldnt turn the deal down. Quite simply it is a very good match for my boat.
Mine will cruise all day long 27 mph at 4200 RPM. WOT i can touch 35 mph on flat water, trimmed out with a light load. At cruise mine sips fuel. I cut the tank down to 55 gallon and i dont even know what my range is, but it's alot.
That 115 etec is more ballsy than mine. If your boat is light i would not be at all surprised if you can get into the upper 30's with a light load. At 25 mph with my engine trimmed all the way down, i can skip across a typical 2 foot Chesapeake Bay chop and ride by other similarly sized boats that are taking a beating.
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