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I can't say that I had exactly the same setup, but I had a 2006 Etec 225 with the same 1.86:1 gear ratio on a 1987 22 OR with a T-Top. Turned 5600 rpm at 45-46 mph with a 15.5 x 17P Rebel prop, best cruise was 28-29 mph at 10 gph. Motor was mounted all the way up in the 4th hole.