Take Yamaha's legendary performance and reliability, then add the incredible efficiency of a 4-stroke and Electronic Fuel Injection. You've already got a great machine on your hands. But add the extra torque that our specially designed High Thrust models deliver, and you're looking at the workhorse you need to push your pontoon or heavy sailboat. The High Ratio Gear Case delivers added power while minimizing slippage and cavitation. The optional Dual Thrust Prop gives you more thrust in both forward and reverse for maximum maneuverability. It's Yamaha's clean, quiet, fuel-efficient 4-stroke technology with an extra measure of muscle. Put it to work for you. Yamaha's Dual Thrust™ propeller measures 14" in diameter and 11' in pitch for the T60 and T50 models. The large diameter, low pitch design provides up to 70% more thrust in reverse and 60% more thrust in forward than a standard two stoke, making it ideal for pontoon boats and other applications where maneuverability and thrust is important. There's even Dual Thrust propellers for the T9.9 and T8, which are standard on these models. The Optional Multi-Function Tiller Handle on T60 and T50 models gives you easy fingertip control. Improved lever ergonomics give you more positive shifting. The new rubber throttle handle provides a better grip, and requires less rotation to go from idle to wide-open throttle (90°) for less fatigue. The Power Trim & Tilt switch is now just forward of the grip. The T9.9 and T8 also have tiller handle models available.