We ran these new engines in Japan on various skiffs and flats boats and came away impressed with the torque. We had no problem getting up on plane quickly. And yes, you can expect these engines to weigh more than comparable horsepower two-strokes, but they tip the scales at about the same weight (373 pounds) as the competition's four-strokes. The factory lists full throttle as 6,000 rpm, though both engines develop their respective horsepower ratings at 5,500 rpm. The standard gear ratio is 2.33:1.