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Convenience and Control

• EASY ENGINE FLUSHING: A Freshwater Flush Device allows you to flush the engine without running it, for added convenience and extended engine life.

Features

• Prop shaft horsepower - 9.9 hp @ 5,500rpm
• Compression ratio - 9.4:1
• Recommended fuel - Octane 87
• C.A.R.B. rating - 3-Star
• Intake - 4
• Spark plug - BR6HS-10
• Ethanol blend limit - 10% maximum
• Degree of tilt - 71°
• Compatible controls - Mechanical
• Compatible gauges - Command link and analog

Power and Performance

• MORE THRUST: The Higher Gear Ratio on Yamaha’s High Thrust outboards make these powerhouses ideal for heavy pontoons and other applications that require an extra measure of muscle.
• MAX MUSCLE: Increase thrust up to 60 percent in forward and 70 percent in reverse with a large-diameter, low-pitch Dual Thrust™ propeller. They're optional on our High Thrust T50 and T60, and standard on our T25 and T9.9, and are perfect for sailboats and pontoons. They can also be used on Yamaha Midrange outboards with 4.25" K gearcases.
• OPTIMUM PERFORMANCE: Microcomputer Ignition adjusts timing to maintain optimum engine performance, economy and power under all conditions.
• SINGLE OVERHEAD CAMSHAFT: A Single Overhead Camshaft (SOHC) design creates a compact, lightweight, space-saving design.
• FUEL ECONOMY: Precision Multi-Point Electronic Fuel Injection on the T60 and T50 delivers the exact amount of fuel needed for optimum performance and efficiency. Yamaha’s EFI optimizes fuel atomization, further enhancing fuel economy.

Reliability & Durability

• SOLID AND DEPENDABLE: Incoming air is routed through an Air Intake Labyrinth System that traps and drains water before it enters the engine's intake for maximum reliability.
• CONSISTENT PERFORMANCE: Thermostatic Cooling Control helps provide proper engine temperature at all times for consistent performance and long, trouble-free engine life.
• WET SUMP: The T50, T60, T25 and T9.9 all feature a pressurized oil delivery system that incorporates a compact and durable oil pump to keep all of the moving parts of their SOHC systems lubricated and running smoothly for maximum reliability.
• CORROSION PROTECTION: Combined with our proprietary alloy (YDC-30), our exclusive Phaze Five™ anti-corrosive paint system provides a tough, five-layer barrier against corrosion. This protection is standard on all Yamaha High Thrust engines.