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Convenience & 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 @ 5,500 rpm
• 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
• Compatible with Remote Mechanical Control
• Standard Equipment - High thrust lower unit

Power & 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 standard on our T9.9 and is perfect for sailboats and pontoons. They can also be used on Yamaha Midrange outboards with 4.25 inch 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.

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 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 four-stroke engines.