Extreme – Go beyond the next level.

The muscular new shape and dynamic look of the XF425 XTO immediately communicate its incredible industry-first concepts and technologies waiting to be unleashed.

The first direct injection 4-stroke. The first with integral electronic steering, linking seamlessly to Yamaha's Helm Master® system. The first to achieve a new level of reverse thrust, torque, and speed. It's a genuine performance revolution for larger boats and an incredible story. Achieve the ultimate. Discover Extreme.

At a glance

  • Extreme Power - 5.6L • 32-v • 60º V8 • DOHC • VCT
  • Efficiency - first-ever Direct Injection 4-stroke
  • Precision - built-in electric steer-by-wire system
  • Ultimate control - unique all-electronic systems
  • 300% more reverse thrust from new exhaust system
  • Reliability - tough custom-engineered crankshaft
  • Dependability - new heavy duty gear system
  • New sleek lower unit design with massive gearcase
  • Dual chamber oil pump to handle extreme demands
  • Ultra-convenient in-water gear oil change facility
  • High Output charging - for more output at low rpm
  • Ideal for heavy boats and RIBs - XTO OS propellers

XTO 425hp V8

Whether you enjoy the thrill of water sports or just relaxing on your boat, choose the engine that helps you get more out of your time on the water.

XTO 425hp V8 XTO 425hp V8 XTO 425hp V8 XTO 425hp V8 XTO 425hp V8 XTO 425hp V8 XTO 425hp V8 XTO 425hp V8 XTO 425hp V8 XTO 425hp V8 XTO 425hp V8 XTO 425hp V8
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    Key Features

    Features Gallery
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      High levels of power, torque and control

      XTO stands for Xtreme Thrust Output because this awesome V8 unit delivers a totally new generation of power, performance and precision control never before available. Together, our XTO 375hp V8 and XTO 425hp V8 engines and unique Helm Master® system provide a seamlessly integrated total power and control solution for larger offshore boats. Explore the Extreme.

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      5.6 litres of naturally aspirated V8 power

      At the heart of this flagship powerhouse is Yamaha's very latest technology, taken to new levels. With features like 5-pump Direct Fuel Injection, VCT (Variable Camshaft Timing), DOHC (Double Overhead Camshafts), dual chamber oil pump, 2-stage water pump, quadruple thermostats, our unique in-bank exhaust system … the stage is set.

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      Ultimate efficiency from Direct Injection

      With our constant quest for ever-greater efficiency and economy, industry firsts often happen at Yamaha and the fuel system on the XTO outboards is a good example - it's the first-ever Direct Injection 4-stroke engine. In fact, the XTO outboards are packed with such advances, from the in-water oil change facility to the thrust-enhancing exhaust system.

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      Integrated electric steering - smoothly efficient.

      This highly efficient system, actually built into the motor unit itself, is not only lighter and less complex than a separate hydraulic system, but is cleaner to fit and operate. What's more, the response time for the helmsman is faster and more precise - and the result even smoother.

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      Convenience is important to any owner

      That's why the XTO 425hp V8 has thoughtful features like these: The facility for an in-water gear oil change - with the boat still at the dock. A multi-part cowling that has quick-access locks and allows secure, easy access for maintenance and adjustments. A High Output system to provide stable 72A charging - and 58A charging even at low rpm.

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      Extreme performance demands tough technology.

      There can be no compromise on build quality and reliability at this level, so every bit of the XTO engines are built super-tough. From the massive crankshaft to the torque-absorbing heavy duty gears - and from the extra-large diameter prop shaft to the completely new gearcase design, with its low friction co-efficient and better cooling.

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      Thrust-enhancing exhaust system.

      This engineering concept expels the exhaust via a combination of three different routes, depending on the RPM level. Put simply, the result is around 300% more reverse thrust (than it would have without these measures) and better balance between forward and reverse thrust when manoeuvering with Helm Master® - plus greater efficiency at full power.

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      More driving force - the XTO OS propellers.

      These propellers are designed to cope with the extreme demands the owners of V8 XTO outboards will make on them. So the hub and blades are larger, tougher and stronger - and they're crafted from duplex stainless steel for greater corrosion resistance. Last but not least, they feature our unique Shift Dampener System (SDS™).

    Technical Specifications

    Download Factsheet
    • Engine
      Engine type
      4-stroke
      Displacement
      5559 cc
      No. of cylinders/Configuration
      60°-V8, 32-valve, DOHC with VCT
      Bore x stroke
      96.0 x 96.0
      Prop shaft output at mid range
      316.9kW / 5,500 rpm
      Full Throttle Operating Range
      5,000 - 6,000 rpm
      Lubrication system
      Direct Fuel Injection
      Ignition / advance system
      TCI
      Starter system
      Electric
      Gear ratio
      1.79 (25:14)
    • Dimensions
      Transom height
      X:640mm U:767mm E:894mm
      Oil pan capacity
      7.8 litres
      Weight without propeller
      442 – 463 kg
    • Additional Features
      Control
      Drive By Wire (DBW)
      Trim & Tilt method
      Power Trim & Tilt
      Light coil / Alternator Output
      12V - 90A with rectifier/regulator
      Propeller
      Optional
      Counter Rotation Model
      Available on X, U and E
      Shallow Water Drive
      Standard
      Tilt limitter
      Standard
      Digital Network Gauge II (CL7)
      Optional
      Shift Dampener System (SDS)
      Optional
      Full tilt up angle
      77°
      Remark
      The kW data in this sheet is based on the ICOMIA 28 standard, measured at the prop shaft

    Uvek nosite kacigu, zaštitu za oči i zaštitnu odeću. Yamaha preporučuje sigurnu vožnju i poštivanje drugih vozača. Fotografije prikazane u ovoj brošuri prikazuju profesionalne vozače u kontrolisanim uslovima. Specifikacije Yamaha proizvoda predmet su promene bez prethodne najave i mogu se razlikovati u skladu sa zahtevima i uslovima. Za više informacija obratite se svom Yamaha trgovcu.

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