I have an 1984 sea nymph 19ft aluminum boat. I have had alot of issues with the motor since day 1 and am considering a repower. It is currently at a mechanic who is wanting to do alot of testing to see what is going on with it.. (again).I am a bit tired of dumping money into an unreliable smokey old 2 stroke so he offered me a trade plus cash (obviously) for a 2000 evinrude 70hp 4stroke. My current motor is a 1984 115hp evinrude 2 stroke. It is more motor than that boat needs for sure, but I am a bit worried about the 70hp being underpowered.. anybody have any suggestions or experience with aluminum boats of similar size and what hp worked best? I was told the boat alone weighs right at 1,000lbs but I'm not certain. I would feel much more comfortable with a 90hp as im sure that would be sufficient. if anybody has a 90 for sale or has any suggestions I would appreciate the help!