Introducing the XTO Offshore®

This 5.6L V8 is more than an outboard. It's an integrated power system.

XTO Offshore^®

Industry's First Direct-Fuel-Injection Four Stroke

Maximizes power and efficiency by spraying fuel at high pressure directly into the combustion chamber. It's the first four-stroke powerhead in the outboard industry to feature direct injection.

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

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 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.

Endurance-Driven Camshaft

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.

Carbon-coated Lifters

A special carbon coating on shimless, bucket-style valve lifters increases durability and requires less maintenance.

Dual Chamber Oil Pump

The XTO's dual chamber oil pump ensures the proper flow and delivery at every engine speed.

Two-Stage Water Pump

This unique design ensures proper cooling water flow at all RPMs and improved temperature control. It features a massive rubber water impeller for high pressure and flow, and a steel impeller that helps provide sufficient water volume, even under the most extreme offshore conditions.

Plasma-Fused Sleeveless Cylinders

A micro-textured, plasma-fused design increases fuel economy and is lighter, more compact and 60 percent harder than steel. This allows us to enlarge cylinder bores and increase displacement without increasing the size of the powerhead, all while dramatically reducing friction.

Integrated Steering

The XTO responds quicker to steering inputs because it contains the industry’s first electric steering motor, which directly moves the outboard.

In-Water Gear Lube Change System

For the first time ever, your technician can drain and replace your outboard's lower unit lubricant without having to remove the boat from the water. Here's to convenience and having more uninterrupted hours on the water.

Thrust-Enhancing Exhaust Routing

Diverts engine exhaust away from the propeller at RPM below approximately 2,500, for maximum control at lower speed and increased precision of our Helm Master fully integrated boat control system.

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 award-winning new system produces up to 96 amps of net charging power at idle—from a single outboard—and up to 384 net amps in a quad 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.

Reset Engine
First Direct-Injection Four Stroke
Exclusive Fuel System
In-Bank Exhaust
XTO (SDS) Propellers
Endurance-Driven Camshafts
Carbon-Coated Lifters
Dual-Chamber Oil Pump
Two-Stage Water Pump
Plasma-Fused Sleeveless Cylinders
Integrated Steering
In-Water Gear Lube Change System
Thrust-Enhancing Exhaust Routing
Pump Stop Power Tilt Limit
Dual Flush System
Wide-Span Powerhead Mounting System
Phase Angle Control Charging
Improved Rigging Tube

Power & Performance

Reliability & Durability

Convenience & Control

System Integration

Electric Steering

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

Helm Master® EX

Make the most of every minute on the water with the incredible control of Helm Master EX. Helm Master EX is built on the success of our groundbreaking, original Helm Master boat control system. It expands upon the functionality, flexibility and compatibility of our original Helm Master system, for an exciting next generation of control.

CL7 Touchscreen Display

Yamaha’s CL7 7-inch touchscreen display is our most streamlined instrumentation and is compatible with the new V8 XTO Offshore. The CL7 allows you to monitor vital boat functions and the performance of up to four outboards through one gauge. You can also access Helm Master and its upgraded SetPoint suite of precision boat control functions, and have the option built-in freshwater and saltwater maps.

Videos

Introduction to XTO Offshore

Take it to the Extreme

XTO Offshore Lifestyle

Expand Gallery

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 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.

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

CONTROLS

GAUGES

Prop Selector

V8 5.6L 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.

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

CONTROLS

GAUGES

Prop Selector

Specs & Compare

425 hp
450 hp

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.	102 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/ 102 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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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	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)
C.A.R.B. Rating	3-Star
Exhaust	Through Propeller (Except in Reverse Under 2500 RPM)
Intake	32-valve
Ignition	TCI Microcomputer
Spark Plug	ILMAR7E-9 / Iridium
Alternator Output
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°
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

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Perf. Bulletins

425 hp
450 hp

View Bulletins for all Models