Boat Shop.

YAMAHA OUTBOARD ENGINES

XTO OFFSORE

extreme control, precision & durability

STARTING AT

POA

ENGINE TYPE

V8 DOHC

DISPLACEMENT

5,6L

Weight

448kg

HORSEPOWER

450 & 425

Meet the Lineup

Miles from shore. No land in sight. Nothing on your mind but the adventure ahead and the formidable offshore gamefish that await. That’s the beauty of having a reliable Yamaha 5.6L V8 XTO Offshore® behind you. Purpose-built for the rigors of the offshore, the XTO gives you extreme control, precision, and durability—and now up to 450 horses. Go further and with more confidence than ever before—the Yamaha XTO Offshore F450 and F425.

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XTO Offshore® 450

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 outstanding 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
- Impressive 5-year Limited Warranty, for pleasure use

SPECIFICATIONS
- Weight 437 kg (963 lbs) / 448 kg (988 lbs) / 458 kg (1010 lbs)
- Full Throttle RPM Range 5000 - 6000 RPM
- Fuel Induction System Direct Injection / Up to 2900 PSI
- Recommended Engine Oil Yamalube® 4M (See owner's manual)
- 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 - Alternator Output at W.O.T. 102 Amp Gross, Max (up to 96 NET at idle)
- Compression Ratio 12.3:1
- Recommended Fuel Octane 89
- 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)

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XTO Offshore® 425

The XTO Offshore® 425 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.

- 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
- mpressive 5-year Limited Warranty, for pleasure use

SPECIFICATIONS
- Weight 432 kg (952 lbs) / 443 kg (977 lbs) / 453 kg (999 lbs)
- Full Throttle RPM Range 5000 - 6000 RPM
- Fuel Induction System Direct Injection / Up to 2900 PSI
- Recommended Engine Oil Yamalube® 4M (See owner's manual)
- 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 420hp at 5500 RPM - Alternator Output at W.O.T. 100 Amp Gross, Max
- Compression Ratio 12.2:1
- Recommended Fuel Octane 89
- 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)

Power, Performance & CONTROL

DIRECT-INJECTION FOUR STROKE

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

 

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 (SDS) PROPELLERS

With diameters from 16 to 17 1/8 inches, 15 to 27-inch pitches and increased blade surface, XTO propellers complement the torque potential of our V8 XTO Offshore. They also contribute to greater overall thrust.

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 REVERSE EXHAUST

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 RPM below 2,500.

PHASE ANGLE CONTROL CHARGING

The XTO’s Phase Angle Control Charging System meets the extreme electrical needs of today’s larger boats. This Innovation Award-winning 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. That’s up to 65 percent more maximum net charge at idle than previous XTO Offshore models.

 

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 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

System Integration

DIGITAL ELECTRIC STEERING

The XTO responds quicker to steering inputs because it contains a digital electric steering motor, which directly receives signals from the electric helm to the integrated steering control unit.

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 and Course Hold; the expanded ability to control up to five outboards, and more.

HARNESS THE POWER WITH HELM MASTER® EX

The 5.6L V8 XTO Offshore XF 450 and XF425 are compatible with Yamaha's groundbreaking Helm Master EX boat control system. It provides full joystick maneuverability for one to five engines; new wireless control for on-boat flexibility; automated functions for fishing, navigation, and relaxing; and the list goes on. You're about to love the water even more.

RELIABILITY & DURABILITY