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I have a Tohatsu 6 hp Sail Pro 4 stroke kicker on my 1999 Alert 17, it weighs 59 pounds, comes standard with a high thrust propeller and an alternator. About $1500 U.S. Just as an example an alternator kit for a 6 hp Yamaha is $300 extra over the cost of the motor and you can't get a high thrust propeller for the Yamaha. Not dissing Yamaha, my main motor is a Yamaha F70. The Tohatsu will push my boat 6.3 mph and I have had it for 3 years and am very happy with it. Hope this helps. P.S. I also love my Yamaha F70.