Yamahas high-powered portables are redefining the expectations for portable horsepower, from the F15 and F20 to the outstanding, new F25, an IBEX Innovation Award Winner for 2017. Their single-overhead-camshaft, two-cylinder designs create power to weight thats not only eye-opening”but in the case of the F25, its also class-leading and category jumping. In fact, the four-stroke 25 hp, previously a midrange outboard, is now so light, its 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 youre headed duck hunting with a jon boat or on the way to a lake cottage and your 14-foot aluminum boat, your Yamaha portables ready to go.
Power & 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
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.
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.
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.
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.
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 four-stroke outboards.
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.
Model Specific Features
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, its 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
Engine Type: 2 cyl
Displacement: 362 cc
Bore x Stroke: 63 x 58.1mm (2.48 x 2.29 in)
Prop Shaft Horsepower: 15 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)
Recommended Fuel: Octane 87
Recommended Engine Oil: Yamalube 4M (See owner's manual)
Recommended Fuel Filtration: Yamaha 10-Micron Fuel/Water Separating Filter (external)
C.A.R.B. Rating: 3-Star
Exhaust: Through Propeller
Spark Plug: DPR6EB-9
Alternator Output: 10 Amp
Starting System: Electric & Manual
Lubrication: Wet Sump
Engine Oil Capacity: 1.8L/1.6L
Recommended Cooling: Thermostatic Control
Ethanol Blend Limit: 10% Maximum
Gear Ratio: 2.08:1
Gear Shift: Forward, Neutral, Reverse
Shaft Length: 15"
Degree of Tilt: 67Â°- 71Â°
Degree of Trim: -4Â° through +16Â°
Dry Weight: 15" shaft / 50kg (111 lbs)
Mounting Centers: N/A
Steering Angle (maximum): 45Â° from center, either direction
Warranty: Limited 3-Year Pleasure, 3-Year Government, 1-Year Commercial
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).