06-04-2008, 05:30 PM
6 hp should be plenty. I use to have a 21' Trophy with a 6hp Merc and it did just fine in fact 99% of time I didn't need go over 1/4 throttle. I know another BFT'er that has a 16' boat and uses a 4 hp but I don't know what his power situation is. The problem if you go to small and have to run the motor at max full throttle all the time you will increase the wear on the unit. My merc was very economical as well. I have however since purchased a new boat and run a Yamaha 8hp. Though I don't think you need that big of motor, I have been very impressed with the Yamaha.
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