2018 Yamaha F6 Portable - 20" Shaft

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F6 Portable - 20" Shaft



Yamaha’s smallest Portables, the F6, F4 and F2.5, weigh in at as little as 37 pounds, with streamlined overhead-valve, one-cylinder designs. Their light weights, combined with built-in carrying handles, resting pads and an oil-leak prevention system for on-side storage capability create true portability. Add to that their efficiency, performance and reliability and these pint-sized powerhouses are perfect for all sorts of light duty, like hopping to the cuddy on a tender. Wherever the day takes you, you can take along a little extra power with an F6, F4 or F2.5 Yamaha Portable.

Power & Performance
  • 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.
  • Ultra-Low Emissions: The Portable F6, F4 and F2.5 are California Air Resources Board (C.A.R.B.) Three-Star Rated for Ultra-Low Emissions and meet federal EPA requirements.
  • 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.
Reliability & Durability
  • 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.
  • 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.
  • Maximum Efficiency: The F6, F4 and F2.5 have a carburetor with a factory-selected setting for maximum efficiency, which helps them achieve a C.A.R.B. Three-Star Rating for Ultra-Low Emissions. Additionally, automatic decompression, built-in auxiliary priming and start-in-gear prevention help make for easier starts.
Convenience & Control
  • 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.
Model Specific Features
  • Our 139-cc 6-hp portable is an impressive little outboard. It boasts surprising features for such a small motor, like labyrinth exhaust and a long span mounting system for smooth, quiet power. It also offers the convenience an external fuel tank (in addition to its built-in tank) for extended range and added convenience.
  • Tiller-handle control with forward-neutral-reverse shifting and an ergonomic twist-grip throttle
  • Only 59 pounds (15” shaft model)
  • Available in 15” and 20” shaft lengths
  • Solid 6-amp alternator (optional)
  • Engine Type: 1 cyl
  • Displacement: 139cc
  • Bore x Stroke: 62 x 46mm (2.44 x 1.81 in.)
  • Prop Shaft Horsepower: 6hp at 5000 rpm
  • Full Throttle RPM Range: 4500 ~ 5500
  • Alternator Output at W.O.T.: 6 Amp
  • Compression Ratio: 8.9:1
  • Fuel Induction System: Carb
  • Weight: 28 kg (61 lb.)
  • Recommended Fuel: Octane 87
  • Recommended Engine Oil: Yamalube® 4M (See owner's manual)
  • Recommended Fuel Filtration: N/A
Weight refers to shortest shaft length, and is measured without motor oil, gearcase oil and propeller (except models 25 hp and under, which include a standard propeller). All Jet model weights include the jet pump assembly (weight estimated).



Engine Type
1 cyl.
Bore x Stroke
2.44 x 1.81 in. (62 x 46mm)


Shaft Length
20 in.
61 lb. (28 kg)


Propshaft Horsepower
6hp at 5000 rpm
Full Throttle Operating Range
4500 ~ 5500 rpm
Fuel Induction
6 Amp


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