Engine Type
V8 / DOHC / 32 valves / 4 Valves per Cylinder
Bore x Stroke
96 x 96 mm (3.78 x 3.78 in)
Prop Shaft Horsepower
425hp at 5500 RPM
Full Throttle RPM Range
5000 – 6000 RPM
Alternator Output at W.O.T.
90 Amp Gross, Max
Compression Ratio


The XTO Offshore is the result of years of collaboration with top boat designers, and has been built from the ground up to provide the ultimate in power and efficiency offshore. With impressive stats such as the highest compression ratio on the water, industry firsts such as an electric steering system, and engineering touches such as iridium spark plugs and quad thermostats, it’s purpose-built for extreme power, durability, control and reliability.

  • Available in signature Yamaha gray or new pearlescent white
  • 425 hp on less-expensive 89-octane gasoline
  • Available with Helm Master with SetPoint
  • Impressive 5-year Limited Warranty, for pleasure use

Fuel Induction System
Direct Injection / Up to 2900 PSI
432 kg (952 lbs) / 443 kg (977 lbs) / 453 kg (999 lbs)
Recommended Fuel
Octane 89
Recommended Engine Oil
Yamalube® 4M (See owner’s manual)
Recommended Fuel Filtration
Yamaha 10-Micron Fuel / Water Separating Filter (external)