Yamaha F25 Portable 15 in. Mechanical

Yamaha Gray • New Boat Engines

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The marsh rustles in the fall breeze as you deploy your decoys. There’s nothing like a trusty Yamaha Portable outboard for a crisp day of fishing or duck hunting. Yamaha’s Portable F25, F20 and F15 pack impressive power-to-weights and all the advantages of Yamaha’s award-winning, portable design, including carrying handles, incredibly light weights and more. The F25 even comes in matte brown, in case stealthy is part of the ask. No matter what’s ahead, your Yamaha Portable will be ready to go.

Our 432-cc 25-hp portable outboard features a streamlined, portable design and class-leading power-to-weight. While it’s 25 percent lighter than its previous design, 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.

  • Now available in new pearlescent white and matte brown*, in addition to Yamaha gray
  • Only 126 pounds (15” shaft model)
  • Available in 15” and 20” shaft lengths and in a High-Thrust design (T25)
  • Powerful 16-amp alternator
  • Variable Trolling RPM Switch (VTS®) accessible depending on rigging
  • Select models, including 15-inch shafts, feature a shorter tiller with Power Trim & Tilt and a tilt-up feature for ease in small spaces

*New color options available in select models and subject to availability.

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Yamaha F25 Portable 15 in. Mechanical

Condition
New
Category
Boat Engines
Model Type
25 / 20 / 15 hp
Model Code
NA
Color
Yamaha Gray

Convenience and 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.

Features

  • Prop shaft horsepower - 25 hp at 5,500 rpm
  • 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
  • Intake - 4
  • Spark plug - DPR6EB-9
  • Ethanol blend limit - 10% maximum
  • Degree of tilt - 62° - 63°
  • Compatible controls - Mechanical
  • Compatible gauges - Digital and analog

Power and Performance

  • 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.

Reliability & Durability

  • 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.
  • 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.
  • 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.

General Information

Manufacturer
Yamaha
Model
F25 Portable 15 in. Mechanical
Model Code
NA
Color
Yamaha Gray

Electrical

Alternator Output
At W.O.T. - 16A

Engine

Cylinders
2
Ignition
CDI Microcomputer
Starting
Electric and manual
Exhaust
Through propeller

Measurements

Power
25 Horsepower
Displacement
432 Cubic Centimeter
Bore x Stroke
2.56 x 2.56 in. (65 x 65.1 mm)
Shaft Length
15"
Dry Weight
126 lbs

Operational

Steering

Mechanical

Angle (maximum) - 45° from center, either direction

Fuel Type
Unleaded
Full Throttle RPM Range
5,000 - 6,000 rpm
Fuel Induction
EFI
Lubrication

Wet sump

Recommended engine oil - Yamalube® 4M (See owner's manual)

Engine oil capacity - 1.2 qt. (1.1 l) / 1.1 qt. (1.0 l)

Cooling
Recommended - Thermostatic control
Gear Ratio
2.00:1
Gear Shift
Forward, Neutral, Reverse
Trim System
Degree of trim - -3° through +16°

Other

Additional Colors

Yamaha Gray

Pearlescent White

Warranty
Limited 3-year pleasure, 3-year government, 1-year commercial

Additional Colors

    Gallery

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    Images, where available, are presented as reasonable facsimiles of the offered unit and/or manufacturer stock images. Non-standard options or features may be represented. No guarantee of availability or inclusion of displayed options should be inferred; contact the dealer for more details.

    • Price, if shown and unless otherwise noted, represents the Manufacturer's Suggested Retail Price (MSRP) or dealer unit price and does not include government fees, taxes, dealer vehicle freight/preparation, dealer document preparation charges, labor, installation, or any finance charges (if applicable). MSRP and/or final sales price will vary depending on options or accessories selected; contact dealer for more details.

    • Images, where available, are presented as reasonable facsimiles of the offered unit and/or manufacturer stock images. Non-standard options or features may be represented. No guarantee of availability or inclusion of displayed options should be inferred; contact dealer for more details.