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Yamaha launch the F425 outboard engine

V8 5.6L 425 hp

The new Yamaha F425 is the result of years of collaboration with top boat designers, and has been built from the ground up to provide the ultimate in power and efficiency offshore. With impressive stats such as the highest compression ratio on the water, industry firsts such as an electric steering system, and engineering touches such as iridium spark plugs and quad thermostats, it’s purpose-built for extreme power, durability, control and reliability.

  • Available in signature Yamaha gray or new pearlescent white

  • 425 hp on less-expensive 89-octane gasoline

  • Available with Helm Master® with SetPoint™

  • Impressive 5-year Limited Warranty, for pleasure use

  • The first 4-stroke outboard motor to use Direct Fuel Injection

  • High amp alternator, even at trolling speeds

  • Electronic steering integrated into the transom bracket

The highest-output model in the lineup, the F/FL425A is powered by a newly-developed 4-stroke 5,559 cm3 V8 engine which delivers a maximum of 425 horsepower. This power unit features the first application in a 4-stroke outboard motor of direct injection technology, which sprays fuel at high pressure and high precision directly into each combustion chamber, rather than the intake track. This technology increases combustion efficiency, delivering unrivaled power and torque and providing boats with the ultimate in acceleration and top-speed performance.

As well as strengthened parts for heavy-load operation, including the gearcase, bracket, and camshaft, the first application to a Yamaha outboard motor of technology and materials such as sleeveless cylinders formed through plasma fusion technology and iridium spark plugs delivers reliability and durability.

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