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.*
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 Type – 4-Stroke, 16 Valve SOHC In-line 4 Cylinder
Bore x Stroke (mm) – 81 X 88.9
Fuel Tank Capacity (l)
Displacement (cc) – 1832.0
Recommended Maximum RPM- 5000 – 6000
Fuel Management – EFI
Ignition – TCI
Lubrication System – Wet sump
Alternator Output – 12V – 35A with rectifier regulator
Gear Ratio – 2.15 : 1
Starter SystemElectric
Operation Method – Mechanical Control (Optional Tiller Handle Available)
Trim and Tilt Method – Power Trim & Tilt
Digital Gauges – Optional
Command Link Gauges – Optional
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