2018 Yamaha T25 - 20 in. Shaft

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T25 - 20 in. Shaft



Yamaha’s High Thrust four strokes, are built for jobs that call for more muscle—like pushing a heavy pontoon, adding extra kick to a multi-species boat or maneuvering a sailboat through a crowded marina. Available in 60, 50, 25 and 9.9 horsepower, their larger lower units and higher gear ratios produce substantially more thrust than conventional outboards of the same horsepower using standard propellers. In fact, when paired with our Dual Thrust™ propellers, (optional on T60/T50 and standard on our T25 and T9.9) Yamaha High Thrusts produce up to 60 percent more forward thrust and up to 70 percent more thrust in reverse.

Power & Performance
  • More Thrust: The Higher Gear Ratio on Yamaha’s High Thrust outboards make these powerhouses ideal for heavy pontoons and other applications that require an extra measure of muscle.
  • Max Muscle: Increase thrust up to 60 percent in forward and 70 percent in reverse with a large-diameter, low-pitch Dual Thrust™ propeller. They're optional on our High Thrust T50 and T60, and standard on our T25 and T9.9, and are perfect for sailboats and pontoons. They can also be used on Yamaha Midrange outboards with 4.25" K gearcases.
  • Optimum Performance: Microcomputer Ignition adjusts timing to maintain optimum engine performance, economy and power under all conditions.
  • Single Overhead Camshaft: A Single Overhead Camshaft (SOHC) design creates a compact, lightweight, space-saving design.
  • Fuel Economy: Precision Multi-Point Electronic Fuel Injection on the T60 and T50 delivers the exact amount of fuel needed for optimum performance and efficiency. Yamaha’s EFI optimizes fuel atomization, further enhancing fuel economy.
Reliability & Durability
  • Solid and Dependable: Incoming air is routed through an Air Intake Labyrinth System that traps and drains water before it enters the engine's intake for maximum reliability.
  • Corrosion Protection: Combined with our proprietary alloy (YDC-30), our exclusive Phaze Five™ anti-corrosive paint system provides a tough, five-layer barrier against corrosion. This protection is standard on all Yamaha High Thrust four-stroke engines.
  • Wet Sump: The T50, T60, T25 and T9.9 all feature a pressurized oil delivery system that 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.
  • Consistent Performance: Thermostatic Cooling Control helps provide proper engine temperature at all times for consistent performance and long, trouble-free engine life.
Convenience & Control
  • Gauge Compatibility: Optional Command Link® gauges provide real-time outboard performance, boat systems and environmental data at your fingertips. Streamlines displays available in square or round style for single- or multi-engine applications.
  • Ergonomic Control: Yamaha’s award-winning, Multi-Function Tiller Handle (optional on T60/T50) features an ergonomic design for easy shifting , better grip and less rotation from idle to wide-open throttle. This reduces operator fatigue for a full day of enjoyable boating. Truly multi-function, it control features include throttle, throttle friction control, shift lever, key switch, stop switch and a Power Trim & Tilt switch.
  • Easy Engine Flushing: A Freshwater Flush Device allows you to flush the engine without running it, for added convenience and extended engine life.
Model Specific Features
  • Our 498-cc 25-hp High Thrust outboard is the perfect little addition to a smaller pontoon. Its SOHC two-cylinder design, streamlined intake and microcomputer ignition System ensure maximum power and efficiency. At the same time, a proprietary YDC-30 aluminum alloy and aerodynamic cowling design ensure a compact outboard that produces surprising thrust.
  • Compatible with mechanical controls
  • 201 pounds
  • Available in 20” shaft length
  • Solid 14-amp alternator
  • Engine Type: 2 cyl
  • Displacement: 498cc
  • Bore x Stroke: 65 x 75mm (2.56 x 2.95 in.)
  • Prop Shaft Horsepower: 25hp @ 5500rpm
  • Full Throttle RPM Range: 5000 ~ 6000 rpm
  • Alternator Output at W.O.T.: 13.5 Amp
  • Compression Ratio: 9.4:1
  • Fuel Induction System: Carb
  • Weight: 91 kg (201 lb.)
  • 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).



Engine Type
2 cyl.
Bore x Stroke
2.56 x 2.95 in. (65 x 75mm)


Shaft Length
20 in.
201 lb. (91 kg)


Propshaft Horsepower
25hp @ 5500rpm
Full Throttle Operating Range
5000 ~ 6000 rpm
Fuel Induction
13.5 Amp


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