I went from a 79' 115 Merc to a 2009 ETEC 115 to repower my 18' fibreglass bowrider, used mainly for salmon. Trolls down to 1.6 mph by the gps, without a problem at all for 8 straight hours. I was told it can,and should be done, so I tried it. Nice to know that I can go that route if my kicker konks out. Tons of torque, uses hardly any oil or fuel, NO smoke at all, and extremely quiet even at full throttle. Plus no maintenance for three years, that's cool.8D Even then servicing might probably be cheaper than a fourstroke, you know without all those moving parts to check and adjust, belts and oil changes... Check with Blue Sky Marine in New Hamburg if you don't have a dealer closer to your area. They went out of their way to make my engine swap a very positive experience, and cheaper(much) than the Merc dealer there in the same town. So far, I'm extremely happy.🙂