Yamaha F50 Midrange 20 in. Mechanical

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.
• GAUGE COMPATIBILITY: Optional Command Link® gauges provide real-time outboard performance, boat systems and environmental data at your fingertips. Streamlined displays are designed to withstand the elements and are available in square or round style for single- or multi-engine applications.

Features

• Prop shaft horsepower - 50 hp at 5,500 rpm
• Compression ratio - 9.5:1
• Recommended fuel - Octane 87
• Recommended fuel filtration - Yamaha 10-micron fuel / Water separating filter (external)
• C.A.R.B. rating - 3-Star
• Intake - 8
• Spark plug - DPR6EB-9
• Ethanol blend limit - 10% maximum
• Degree of tilt - 69°
• Compatible controls - Mechanical
• Compatible gauges - Digital and analog

Power and Performance

• SINGLE OVERHEAD CAMSHAFT: A Single Overhead Camshaft (SOHC) on the F70, F60 and F50 provides a compact, lightweight, space-saving design.
• FUEL ECONOMY: Precision Multi-Point Electronic Fuel Injection delivers the exact amount of fuel needed for optimum performance and efficiency. Yamaha’s EFI optimizes fuel atomization further enhancing fuel economy.
• OPTIMUM PERFORMANCE: A TCI microcomputer ignition adjusts timing to maintain optimal engine performance, economy and power under all operating conditions.
• PRECISE THROTTLE CONTROL: All air entering the engine block is routed through a single throttle valve, to ensure the precise amount of air necessary for optimum power and fuel efficiency. It then enters each cylinder through individual long intake tracks, which are 'pulse tuned' to provide air at the precise volume and timing for maximum density and power.

Reliability & Durability

• PROTECTION FROM THE ELEMENTS: All Yamaha Midrange in-line engines feature a proven cowling drain system, to easily and efficiently drain away any water that enters the cowling during normal engine operation. Incoming air is routed through a labyrinth of passages that trap and drain water before it enters the engine's intake, for maximum reliability.
• CORROSION PROTECTION: Combined with our proprietary alloy (YDC-30), our exclusive Phaze Five™ electro-deposited, anti-corrosive paint system provides a tough, five-layer barrier against corrosion. This protection is standard on all the Yamaha Midrange 70-, 60- and 50-horsepower outboards.
• ENGINE WARNING SYSTEM: This system protects the outboard with a range of functions including: overheat protection and low-oil-pressure warning (automatically reducing maximum RPM to 2000), over-rev protection, water-in-fuel detection, start-in-gear protection and shift-in prevention at open throttle.
• WET SUMP: The F70, F60 and F50 use a pressurized oil delivery system and incorporate a compact and durable oil pump to keep all of the moving parts of their SOHC systems lubricated and running smoothly for maximum reliability.
• MAGNETIC DRAIN PLUG: Located in the lower unit to remove metal particles from the gear oil and prevent gearcase damage.