I took off a '89 115 Yamaha carb'd 2 stroke for the e-tec. Same speed, much better fuel milage than before, hardly any oil consumption and super quiet for a 2 stroke.
But, those HPDI Yamaha engines are legendary. Plus they sound like a V6 outboard should.
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General Stonewall Jackson has been quoted saying that when the time of war comes,
“My advice is to draw the sword and throw away the scabbard".