Never Settle for less than V8 Power

Never Settle for less than

V8 Power

White V6 4.2 LITER
Gray V6 4.2 LITER

V8 5.6 Liter

Digital: 425 hp

Yamaha's award winning 5.6L V8 425-hp XTO Offshore is designed from the ground up to be smarter, more powerful and more efficient than anything you've seen offshore. With its extreme control, precision and reliability, the XTO Offshore lets you go further, faster and with more confidence than ever before. With industry-first technology like a direct-injection four-stroke powerhead and an all-electric steering system, it's so much more than an outboard. 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.

Owner's Manuals
Helm Master Compatible
Five Year Limited Warranty
The XTO Offshore DEC is a product of our CommandBlue™ philosophy, approaching engineering and design from the perspective of the boater, resulting in user-friendly products that increase customer satisfaction and confidence on the water.
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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.

Power & Performance

Direct-Injection Four Stroke
Direct-Injection Four Stroke

Direct-Injection Four Stroke

Maximizes power and efficiency by spraying fuel at high pressure directly into the combustion chamber. 

Exclusive Fuel System
Exclusive Fuel System

Exclusive Fuel System

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.

In-Bank Exhaust
In-Bank Exhaust

In-Bank Exhaust

Intake tracks enter the cylinder head from the outside of the powerhead. This gives exhaust gases room for a direct route to the lower unit and out through the propeller hub, streamlining the powerhead and improving flow.

XTO (SDS) Propellers
XTO (SDS) Propellers

XTO (SDS) Propellers

With diameters from 16 to 17 1/8 inches and increased blade surface, XTO propellers complement the torque potential of our V8 XTO Offshore. They also contribute to greater thrust overall, including up to 300 percent more reverse thrust than the Yamaha F350.

Reliability & Durability

Engine with cowling Engine without cowling

Reliability & Durability

Endurance-Driven Camshafts

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.

Convenience & Control

In-Water Gear Lube Change System

For the ultimate convenience, a technician can drain and replace your outboard’s lower-unit lubricant without having to remove your boat from the water.

Thrust-Enhancing Exhaust Routing

For more control at lower speeds and increased precision of our Helm Master® EX boat control system, exhaust is diverted away from the propeller at RPMs below 2,500.

Pump Stop Power Tilt Limit

The tilt pump shuts off when it reaches maximum tilt setting, rather than continuing to run, saving power and reducing noise at full trim in/out.

Dual Flush System

A unique design offers two methods for flushing the XTO, either through a built-in flushing system hose routed through the rigging tube/grommet or through conventional front-mounted direct-hose hook-up.

Wide-Span Powerhead Mounting System

For minimized vibration and a more compact design, incredibly strong upper motor mounts placed wide on the exterior of the upper mid-section work in conjunction with our Long Span Mounting System.

Phase Angle Control Charging

The XTO’s NEW Phase Angle Control Charging System meets the extreme electrical needs of today’s larger boats. This Innovation Award-winning new system produces up to 96 amps of net charging power at idle—from a single outboard—and up to 480 net amps in a quint configuration. This is up to 65 percent more maximum net charge at idle than the previous XTO model.

Improved Rigging Tube

A redesigned rigging tube provides an extra 3.25 inches of clearance at the motor well when tilted up, and is compatible with most flat-transom installations.

System Integration

Electric Steering

Electric Steering

The XTO responds quicker to steering inputs because it contains an electric steering motor, which directly sends signals form the helm to the integral electric steering control unit.

Helm Master® EX

Helm Master® EX

Helm Master EX now features more than 10 automated modes, including new DriftPoint® Track, which helps to automate the drifting of an uneven shoreline; new Autopilot with Heading/Course Hold; the expanded ability to control up to five outboards, and more.

Touchscreen Displays

Touchscreen Displays

Our five-inch touchscreen can monitor up to five outboards, while our seven-inch full function MFD can watch over four outboards.  Both report critical boat stats for fuel, water, and waste**, and allow you to access Helm Master® EX and its upgraded Set Point® suite of precision boat control functions.

**Requires installation of proper sending units 



Power and Performance

Reliability and Durability

Convenience and Control

Meet the Line-Up


V8 5.6L 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.


  • NEW Phase Angle Control Charging System* an award-winning industry first
  • Available in signature Yamaha gray or new pearlescent white
  • 425 hp on less-expensive 89-octane gasoline
  • Compatible with Helm Master® EX
  • Impressive 5-year Limited Warranty, for pleasure use

Specs & Compare

Engine Comparison
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)
C.A.R.B. Rating 3-Star
Exhaust Through Propeller (Except in Reverse Under 2500 RPM)
Intake 32
Ignition TCI Microcomputer
Spark Plug ILMAR7E-9 / Iridium
Alternator Output Up to 96 amps net/ 100 amps gross, max
Starting System Electric w/ PTT
Lubrication Wet Sump
Engine Oil Capacity 7.8L / 8.2 Quarts | 7.5L / 7.9 Quarts
Recommended Cooling Thermostatic Control
Ethanol Blend Limit 10% Maximum
Gear Ratio (25/14) 1.79
Gear Shift Forward, Neutral, Reverse
Shaft Length 25" - 30" - 35"
Degree of Tilt -4° through +73°
Degree of Trim -4° through +16°
Dry Weight 25" shaft / 432 kg (952 lbs) ; 30" shaft / 443 kg (977 lbs; 35" shaft / 453 kg (999 lbs)
Mounting Centers 28.5"
Steering Integrated, Electric Actuation
Steering Angle (maximum) 31° from center, either direction
Warranty Limited 5-Year Pleasure, 3-Year Government, 1-Year Commercial

† Weight refers to shortest shaft length, and is measured without motor oil, gearcase oil and propeller (except models 25 hp and under, which include a standard propeller). All Jet model weights include the jet pump assembly (weight estimated).

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