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F90

The all-new 1.8-liter I-4 F90 features greater displacement and a single-overhead-camshaft design with four valves per cylinder. This boosts power and volumetric efficiency and streamlines design. In fact, it’s 13 pounds lighter than previous designs. A lighter, more powerful design gives the F90 blistering speed that’s 1.5 mph faster than competing outboards.*

  • Available for mechanical remote or tiller control
  • Only 353 pounds
  • Available in 20” or 25” shafts
  • Powerful 35-amp alternator
  • Optional Variable Trolling RPM via the Command Link® tachometer

Description

The next-generation F90 is a direct-evolution of the previous 1.5 litre model, delivering increased fuel-efficiency, reduced-weight and improved performance. Filling an important place in Yamaha’s class-leading mid-range line-up, the new F90 delivers the perfect power option for the large number of Aussie built boats that have a maximum hull rating of 90 horsepower. The four-cylinder, 16-valve, SOHC 1.8L marine engine, is not only 10KGs lighter, but an increase in displacement over the previous generation 1.5L engine aids in a richer torque-band.

The reduction in weight and improved compactness has been achieved through the adoption of a single overhead camshaft valve-train, delivers smooth and efficient performance only seen in 16-valve, four-cylinder engines of this size. The new F90 delivers a 10% improvement in fuel-efficiency and a significant reduction in noise, through improved engine unit rigidity, muffler redesign and the addition of an intake silencer. The Yamaha F90 is compatible with Yamaha’s range of Command-Link gauges, while its NMEA2000 compatibility allows for easy integration with third-party multi-function displays, GPS and fish finders.

Engine

Engine TypeInline 4
Displacement1.8L
Bore x Stroke81 x 88.9mm (3.19 x 3.5 in)
Prop Shaft Horsepower90hp @ 5500 rpm
Full Throttle RPM Range5000 ~ 6000
Alternator Output at W.O.T.35 Amp
Compression Ratio10.0:1
Fuel Induction SystemEFI
Weight*160kg (353 lbs) – 164kg (362 lbs)
Recommended Engine OilYamalube® 4M (See owner’s manual)
Recommended Fuel FiltrationYamaha 10-Micron Fuel/Water Separating Filter (external)

Dimensions

Transom Height (mm [inch])L: 516 [20.3] | X: 643 [25.3]

Dry Weight (kg)L: 162 | X: 166

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