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Yamaha’s next generation

Yamaha has released its new generation of outboard engines. The manufacturer says these engines have been built using innovative new material and processes to bring a fresh approach to the design of its next generation.

Yamaha’s new V6 four-strokes – F300, F250 and F225 – are based around a newly developed 4.2L 60 degree V6 engine. A double overhead camshaft design matched with variable camshaft timing is designed to produce excellent performance and fuel economy. By using a highly-advanced thermally-applied plasma fusion process on the cylinder walls, Yamaha says its new line of V6 Offshore outboards have cylinder walls that are 60 per cent harder than steel. That means larger cylinder bores for increased displacement, resulting in more power and torque without increasing outer cylinder dimensions.

This also means dramatically lighter weight; all three new models in this range weigh less than Yamaha’s current 3.3 litre F225.

The F300, F250 and F225 utilise the state of the art “drive by wire” control systems to ensure smooth throttle operation and responsive performance while also providing secure and reliable shifting.

The new F70 is a further development of the F60, sharing the same displacement and stroke. The engine is lighter than any competitive four stroke or direct injected two stroke motor in the 70-75 horsepower class. The F70 achieves this by its unique four valves per cylinder design activated by a single overhead camshaft rather than the conventional dual camshaft design for 16 valve engines.

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