The 40-hp Yamaha OBE provides powerful performance in a compact package that’s available in both propeller- and jet-pump-driven models. With its single throttle valve, long-track intake manifold and electronic control module, it delivers easy starts, fast acceleration and excellent top-end speed.

Engine Type 3 cyl
Displacement 747cc
Bore x Stroke 65 x 75mm (2.56 x 2.95 in.)
Prop Shaft Horsepower 40hp at 5500rpm
Full Throttle RPM Range 5000 ~ 6000 rpm
Alternator Output at W.O.T. 17 Amp
Compression Ratio 9.4:1
Fuel Induction System EFI
Weight* 97 kg (214 lbs) – 101kg (223 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)