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

Engine Type Inline 4
Displacement 1832cc
Bore x Stroke 81 x 88.9mm (3.19 x 3.5 in)
Prop Shaft Horsepower 90hp @ 5500 rpm
Full Throttle RPM Range 5000 ~ 6000
Alternator Output at W.O.T. 35 Amp
Compression Ratio 10.0:1
Fuel Induction System EFI
Weight* 160kg (353 lbs) – 164kg (362 lbs)
Recommended Fuel Octane 87
Recommended Engine Oil Yamalube® 4M (See owner’s manual)
Recommended Fuel Filtration Yamaha 10-Micron Fuel/Water Separating Filter (external)