XTO Offshore

Yamaha’s award-winning 5.6L V8 XTO Offshore® outboards, and their innovative engineering, set the bar for power and performance offshore. With extreme control, precision and reliability—and now up to 450 horses—the XTO Offshore lets you go further, faster and with more confidence than ever before. Packed with industry-first technology like a direct-injection four-stroke powerhead, an award-winning charging system and integrated all-electric steering, the word outboard is an understatement. It’s a fully integrated power system. And it’s elevating the entire offshore boating experience. Aim for the horizon and beyond with the Yamaha XTO Offshore F450 and F425.
The XTO features dual overhead camshafts that are each connected via a self-tensioning chain immersed in an oil bath and utilize one-sprocket belt engagement. This ensures quiet, precise valve-timing, compact design, low maintenance and long life.
Maximizes power and efficiency by spraying fuel at high pressure directly into the combustion chamber.
A three-stage low-medium-high pressure fuel pump system works, in part, due to two independent, rpm-activated fuel pumps in the Vapor Separator Tank. This unique five-pump system creates an unprecedented fuel injection pressure of up to 2900 PSI to further maximize atomization and efficiency.

Rambo Marine OUTBOARDS

Never Settle For Less Than V8 Power.

The XTO Offshore’s award-winning Phase Angle Control Charging System creates up to 96 amps of net charging power per outboard at idle. That’s up to 480 with quints. In addition to powering a range of critical onboard tech, it prioritizes charging to the starting batteries, for incredible reliability offshore.

Rambo Marine OUTBOARDS

XTO Offshore Specs

  • 450 HP

    The XTO Offshore® 450 packs everything boaters love about the original XTO outboard—the durability, power and reliability—plus extra horses. With impressive stats such as 12.3:1 compression ratio for impressive fuel economy and power and industry-first features such as an integrated electric steering system and Phase Angle Control Charging, it’s purpose-built for the extremes of going offshore.

    Engine Type V8 / DOHC / 32 valves / 4 Valves per Cylinder
    Displacement 5.6L
    Bore x Stroke 96 x 96 mm (3.78 x 3.78 in)
    Prop Shaft Horsepower 450hp at 6000 RPM
    Full Throttle RPM Range 5000 – 6000 RPM
    Alternator Output at W.O.T. 102 Amp Gross, Max (up to 96 NET at idle)
    Compression Ratio 12.3:1
    Fuel Induction System Direct Injection / Up to 2900 PSI
    Weight † 437 kg (963 lbs) / 448 kg (988 lbs) / 458 kg (1010 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)
  • 425 HP

    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 12.2:1 compression ratio for impressive fuel economy and power, 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.

    Engine Type V8 / DOHC / 32 valves / 4 Valves per Cylinder
    Displacement 5.6L
    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. 100 Amp Gross, Max
    Compression Ratio 12.2:1
    Fuel Induction System Direct Injection / Up to 2900 PSI
    Weight † 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)

Interested In A XTO Offshore?

Rambo Marine is your premier destination for Yamaha Outboard Engines. Discover the power, reliability, and innovation of Yamaha’s world-renowned marine engines right here. Whether you’re a seasoned boater or a newcomer to the water, our expert team is dedicated to helping you find the perfect Yamaha Outboard Engine to suit your needs.

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