Our 72-cc 2.5-hp portable outboard is the smallest motor on our roster, but it still packs a punch. Completely redesigned, it’s even more portable, easier to store and clean burning.

Features:

• Only 37 pound
• Shaft Length - 15”
• Color - Gray

Easy Operation

The F6, F4 and F2.5 feature built-in, see through fuel tanks. The F6 and F4 also feature switchable access to an optional, 3.1-gallon external fuel tank for extended range.

Wet Sump

A pressurized oil delivery system that incorporates a compact and durable oil pump to keep all of the moving parts of their Overhead Valve systems lubricated and running smoothly for maximum reliability.

Maximum Efficiency

The F6, F4 and F2.5 have a carburetor with a factory-selected setting for maximum efficiency. Additionally, automatic decompression, built-in auxiliary priming and start-in-gear prevention help make for easier starts.

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.

Lightweight, Portable Power

They may weigh as little as 37 pounds, but these Overhead-Valve portable outboards are packed with features that create smooth, quiet power. This includes a CDI or TCI ignition system, an optimally balanced crankshaft, a long span mounting system and a labyrinth exhaust. 

Surprising Performance

The portable F6, F4 and F2.5 all offer impressive features like electronic ignition, thermostatic cooling and 180-degree steering.

Record Setting Fuel Efficiency

Small motors use less fuel, but according to the Guinness Book of World Records, the Yamaha F4 actually set a world record for fuel efficiency, traveling 67.27 continuous statute miles on one gallon of gas.

Easy Storage

Yamaha’s F2.5, F4, and F6 feature our Easy Storage Oil Retention System. This pressurized oiling system prevents leaks, enabling on-side storage.

Comfortable Control

Incredibly nimble, the F6 and F4 feature 180-degree steering and the F2.5 features 360-degree steering with a dynamically balanced and dampened twist-grip throttle for comfort and convenient maneuverabilty. 

Portability and Storage

Built-in front and rear handles make these lightweights easy to carry. Resting pads and an easy oil retention system allow for convenient on-side storage without cowling scuffs or oil leakage. 

Weight †	17 kg (37 lbs) - 20 kg (40lbs)
Full Throttle RPM Range	5250 ~ 5750
Fuel Induction System	Carb
Recommended Engine Oil	Yamalube® 4M (See owner's manual)
Engine Type	1 cyl
Displacement	72cc
Bore x Stroke	54 x 31.5 mm (2.13 x 1.24 in)
Prop Shaft Horsepower	2.5hp at 5500 rpm
Alternator Output at W.O.T.	N/A
Compression Ratio	8.8:1
Recommended Fuel	Octane 87
Recommended Fuel Filtration	N/A
C.A.R.B. Rating	2-Star
Exhaust	Above Propeller
Intake	2
Ignition	TCI
Spark Plug	CR6HSB
Starting System	Manual
Lubrication	Splash
Engine Oil Capacity	0.35L
Recommended Cooling	Thermostatic Control
Ethanol Blend Limit	10% Maximum
Gear Ratio	2.01:1
Gear Shift	Forward, Neutral
Shaft Length	15"
Degree of Tilt	79°
Degree of Trim	-4° through +16°
Mounting Centers	N/A
Steering	Tiller
Steering Angle (maximum)	360° from center, either direction
Warranty	Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial