An increase of ten horsepower in an outboard engine translates to enhanced vessel performance, primarily observed in acceleration, top speed, and load-carrying capacity. For example, a boat struggling to plane with a 50 hp engine may achieve planing at a lower throttle setting and reach a higher maximum speed with a 60 hp engine.
The significance of this power increment extends to improved fuel efficiency at cruising speeds, especially when carrying additional passengers or equipment. Historically, boaters have often sought higher horsepower ratings to overcome challenges related to unfavorable water conditions, like strong currents or headwinds, and to facilitate watersports activities such as waterskiing or wakeboarding.