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Ron: I am eager to read more data - next spring/summer of course - regarding your E-Tc 90 HO performance on your Boston Whaler 17 Montauk. Congratulations to you for choosing such a powerful outboard motor. I am sure you will be happier with the 90 HO when compared to the gas guzzler carbureted 88 SPL, given your specific boat use and load tendancies. If I interpret your images correctly, you are currently mounted in the third mounting position (of 4), also known on this site as "two holes up. " Your plan is to re-mount to the 4th mounting position, or "three holes up" next season, to determine performance variances. (There is no 5th mounting position on the E-tec 90 HO). I am only left to wonder how the 88 SPL passed; the usual cause is some overlooked human factor like burning contaminated fuel, sticky t-stats or an impeller that disintergrated. Who knows, you are well beyond the previous century's outboard motor technology. Have you done your winterization of the E-Tec 90HO? So simple a process, isn't it?