F25

F25


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.

SPECIFICATIONS
  • Weight *: 57kg (126 lbs) - 65kg (143 lbs)
  • Full Throttle RPM Range: 5000 - 6000
  • Fuel Induction System: EFI
  • Recommended Engine Oil: Yamalube® 4M (See owner's manual)
  • 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
  • Alternator Output at W.O.T.: 16 amp
  • 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
  • Exhaust: Through Propeller
  • Intake: 4
  • Ignition: CDI Microcomputer
  • Spark Plug: DPR6EB-9
  • Starting System: Electric & Manual
  • Lubrication: Wet Sump
  • Engine Oil Capacity: 1.1L/1.0L
  • Recommended Cooling: Thermostatic Control
  • Ethanol Blend Limit: 10% Maximum
  • Gear Ratio: 2.00:1
  • Gear Shift: Forward, Neutral, Reverse
  • Shaft Length: 15" - 20"
  • Degree of Tilt: 62° - 63°
  • Degree of Trim: -3° through +16°
  • Mounting Centers: N/A
  • Steering:
  • Steering Angle (maximum): 45° 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).

COMPATIBILITY

The 432-cc 25-hp portable is compatible with tiller and mechanical controls and a range of gauges and props to suit your preference for performance, control and the display of data. It also allows you to access our Variable Trolling RPM Switch (VTS®) depending on your rigging. Explore compatible components below and contact your dealer for rigging expertise.

Compatible Controls:
Mechanical Controls
Multi-Function Tiller Handle

Compatible Gauges:
Command Link and Analog Gauges

PERFORMANCE BULLETINS
  • Boat Model: Alumacraft Escape 145 CS
  • Engine: F25LA
  • Bulletin: View
  • Boat Model: Alumacraft Escape 145 Tiller
  • Engine: F25LA
  • Bulletin: View
  • Boat Model: Outcast® 16 V
  • Engine: F25LA
  • Bulletin: View
  • Boat Model: Polar Kraft® Outlander V 156 SC®
  • Engine: F25LA
  • Bulletin: View
  • Boat Model: Polar Kraft® Sportsman MV 1585 SE®
  • Engine: F25LA
  • Bulletin: View
  • Boat Model: Starcraft® 16 Patriot
  • Engine: F25LC
  • Bulletin: View
  • Boat Model: Zodiac® 340 BayRunner
  • Engine: F25LA
  • Bulletin: View
FEATURES & BENEFITS

Power and Performance:
Efficient Power
Optimum Performance
Streamlined Intake
Responsive Acceleration

Convenience and Control:
Max Maneuverability
Easy Engine Flushing
Portability And Storage

THE OUTSTANDING,

25 HP PORTABLE

Yamaha’s F25 is still the lightest 25-horsepower outboard on the water—two stroke or four stroke. Its 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.

RELIABILITY & DURABILITY

OPTIMAL OPERATION
A 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.