Yamaha 6hp to 9.9hp Motors – 3 Blade Dual-Thrust Aluminium – 7 Spline Shaft **Yamaha’s large-diameter, low-pitch dual-thrust propellers are designed to give instant power in both forward & reverse, by redirecting exhaust gases away from the propeller, reducing reverse ventilation & generating more power to the water. This increases forward thrust by up to 60% and reverse thrust by up to 70%.
