setting new expectations for portable power


Portable four strokes

Portable four strokes

Mechanical or Tiller: 25 hp, 20 hp  Tiller: 15 hp

Yamaha’s high-powered portables are redefining the expectations for portable horsepower, from the F15 and F20 to the outstanding, new F25. Their single-overhead-camshaft, two-cylinder designs create power to weight that’s not only eye-opening—but in the case of the F25, it’s also class-leading and category jumping. In fact, the four-stroke 25 hp, previously a midrange outboard, is now so light, it’s jumped to our portable family. Like its new F15 and F20 siblings, the F25 has taken on signature portable advantages like an oil-retention system for leak-free, on-side storage capability, carry handles and resting pads. So whether you’re headed duck hunting with a jon boat or on the way to a lake cottage and your 14-foot aluminum boat, your Yamaha portable’s ready to go.

Owners Manuals
3yearlimitedwarranty
Ultra Low Emission

THE NEW, 25 HP PORTABLE

Yamaha’s F25 has gone through a redesign so transformative, it’s now the lightest 25-horsepower outboard on the water—two stroke or four stroke. Its new portable design and class-leading power-to-weight mean 25 horses can boldly go where they’ve never gone before. Jons. 14-foot aluminum fishing boats. The bed of your truck.

Power & Performance

 
Efficient Power
Efficient Power

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
Optimum Performance

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
Streamlined Intake

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
Responsive Acceleration

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.

Reliability & Durability

Reliability & Durability

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.

Convenience & Control

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.

Product Videos:

 
V1: Yamaha Portable

Meet the Line-Up

F25

Portable 25 hp

Our 432-cc 25-hp portable outboard sports a new, streamlined, portable design and class-leading power-to-weight. In fact, it’s the lightest 25-hp outboard on the water—two-stroke or four-stroke. While its streamlined design is 25 percent lighter, it still packs exciting features like battery-less EFI. Pull-start models can now take advantage of this feature, plus the system is designed with an automatic decompression device to require even less effort for manual starting.

  • Available for remote mechanical or tiller-handle control
  • Only 126 pounds (15” shaft model)
  • Available in 15” and 20” shaft lengths
  • Powerful 16-amp alternator
  • Variable Trolling RPM Switch (VTS®) is standard when equipped with new factory-equipped tiller handle or optional Multi-Function Tiller Handle, a Command Link® tachometer or dash mounted VTS switch
F20

Portable 20 hp

Our 362-cc 20-hp portable outboard, with 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 111 pounds, it’s suitable for lightweight craft such as aluminum fishing boats, tenders and inflatables.

  • Available for remote mechanical or tiller-handle control
  • Only 111 pounds (15” shaft model)
  • Available in 15” and 20” shaft lengths
  • Powerful 10-amp alternator
F15

Portable 15 hp

Our 362-cc 15-hp portable features a SOHC in-line, two-cylinder design.  Its single carburetor and CDI Microcomputer Ignition System make it one of the most fuel-efficient in its class. At just 111 pounds, it’s suitable for lightweight craft such as aluminum fishing boats, tenders and inflatables.

  • Available for remote mechanical or tiller-handle control
  • Only 111 pounds (15” shaft model)
  • Available in 15” and 20” shaft lengths
  • Powerful 10-amp alternator

Specs & Compare

Engine Comparison
Engine Type 2 cyl
Displacement 432cc
Bore x Stroke 65 x 65.1mm / (2.56 x 2.56 in)
Prop Shaft Horsepower 25 hp at 5500 rpm
Full Throttle RPM Range 5000 - 6000
Alternator Output at W.O.T. 16 amp
Compression Ratio 9.3:1
Fuel Induction System EFI
Weight* 57kg (126 lbs) - 65kg (143 lbs)
Recommended Fuel Octane 87
Recommended Engine Oil Yamalube® 4M (See owner's manual)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)

*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).

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Engine Comparison
Engine Type 2 cyl
Displacement 362 cc
Bore x Stroke 63 x 58.1mm (2.48 x 2.29 in)
Prop Shaft Horsepower 200 hp @ 5500 rpm
Full Throttle RPM Range 5000 ~ 6000 rpm
Alternator Output at W.O.T. 10 Amp
Compression Ratio 9.3:1
Fuel Induction System Carb
Weight* 50 kg (111 lbs) - 59 kg (132 lbs)
Recommended Fuel Octane 87
Recommended Engine Oil Yamalube® 4M (See owner's manual)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)

*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).

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Engine Comparison
Engine Type 2 cyl
Displacement 362 cc
Bore x Stroke 63 x 58.1mm (2.48 x 2.29 in)
Prop Shaft Horsepower 150 hp @ 5500 rpm
Full Throttle RPM Range 5000 ~ 6000 rpm
Alternator Output at W.O.T. 10 Amp
Compression Ratio 9.3:1
Fuel Induction System Carb
Weight* 50kg (111 lbs) - 59kg (132 lbs)
Recommended Fuel Octane 87
Recommended Engine Oil Yamalube® 4M (See owner's manual)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)

*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).

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