Yamaha T9.9XWHB Outboard Motor. 25-Inch Shaft Tiller Handle Manual & Electric Start High Thrust Gray. The Yamaha T9.9XWHB High Thrust Outboard Motor is engineered to deliver maximum low-speed torque, making it the ideal kicker or auxiliary power source for larger boats, sailboats, and trolling applications. With its 25-inch shaft and purpose-built high-thrust lower unit, this model offers superior control, pushing power, and precision maneuverability-even against wind, waves, and current.. Weigh