Re: 90 hp 4 stroke on a 1706 bluefin spectrum
All things being equal in this size range of boat, invest in the maximum motor that your boat is rated, especially if you intend to pull skiers or put a premium on speed. Depending on usage, you won't need to run the 90 hp as hard as a 70 and the difference in gas consumption may turn out to be negligible. If pulling power or speed is not an issue for you, then a 70 may be perfectly fine but you can't exactly return a motor if its performance disappoints you. With a 90 you will never ever wonder if you should have put on a larger motor. I have yet to hear a boater complain that he overpowered his boat and the world is full of boaters who regretted underpowering their rig.