Our 432-cc 20-hp portable outboard is built on the same award-winning platform as the F25. Its SOHC in-line design and streamlined intake manifold delivers solid power. Not only that, but it’s one of the most fuel efficient in its class. At just 126 pounds, it’s suitable for lightweight craft such as aluminum fishing boats, tenders and inflatables.

Features:

• Only 126 pounds
• Shaft Length - 15”
• Color - Gray
• Powerful 16-amp alternator

Optimal Operation

CDI Microcomputer Ignition monitors throttle position, engine speed and atmospheric conditions in order to precisely adjust ignition timing under all conditions for optimum ignition performance, ensuring smooth and reliable operation.

Engine Warning 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, start-in-gear protection and shift-in prevention at open throttle.

Wet Sump

A pressurized oil delivery system 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™ electro-deposited, anti-corrosive paint system provides a tough, five-layer barrier against corrosion. This protection is standard on all Yamaha Portable outboards.

Efficient Power

The F25, F20 and F15 all feature a two-valve-per-cylinder, single-overhead-camshaft design that provides better breathing and more power.

Optimum Performance

An optimally balanced crankshaft and labyrinth exhaust deliver smooth power, while Microcomputer Ignition adjusts timing to maintain maximum engine performance, economy and power under all conditions.

Streamlined Intake

An intake silencer and manifold on the F20 and F15 result in more direct airflow, for minimum noise and maximum power. 

Responsive Acceleration

An acceleration pump on the F20 and F15 gives the engine the fuel it needs--when it needs it--like during rapid throttle advance. This ensures responsive acceleration

Max Maneuverability

A 45-degree steering angle in each direction means great maneuvering potential.

Easy Engine Flushing

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

Portability and Storage

Incredible light weights, built-in resting pads and carry handles, an easy oil retention system and an optional folding tiller handle, allow for easy carrying and on-side storage without oil leakage or cowling scuffs.

Weight †	57 kg (126 lbs) - 66 kg (146 lbs)
Full Throttle RPM Range	5000 ~ 6000 rpm
Fuel Induction System	EFI
Recommended Engine Oil	Yamalube® 4M (See owner's manual)
Engine Type	2 cyl
Displacement	432 cc
Bore x Stroke	65 x 65.1mm (2.554 x 2.558 in)
Prop Shaft Horsepower	20 hp @ 5500 rpm
Alternator Output at W.O.T.	16 Amp
Compression Ratio	9.3:1
Recommended Fuel	Octane 87
Recommended Fuel Filtration	Yamaha 10-Micron Fuel/Water Separating Filter (external)
C.A.R.B. Rating	2-Star
Exhaust	Through Propeller
Intake	4
Ignition	CDI
Spark Plug	DPR6EB-9
Starting System	Electric & Manual
Lubrication	Wet Sump
Engine Oil Capacity	1.1L/1.0L
Recommended Cooling	Thermostatic Control
Ethanol Blend Limit	10% Maximum
Gear Ratio	2.00:1
Gear Shift	Forward, Neutral, Reverse
Shaft Length	15"
Degree of Tilt	62°- 63°
Degree of Trim	-3° through +16°
Mounting Centers	N/A
Steering	Remote Control
Steering Angle (maximum)	45° from center, either direction
Warranty	Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial