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XF450

XF450

Yamaha has taken the next step forward in premium outboard power, with the introduction of the XTO Offshore 450.

Featuring the same 5.6L big block displacement and long list of features as our original XTO 425, this awesome engine improves the outboard that took the world by storm.

The XTO Offshore 450 now comes with a Phase Angle Control Charging System, which features three-phase, simultaneous charging that produces more net amps at a low RPM – ideal for running high demand devices like gyro stabilisers, air conditioning, sounds systems and more.

For extra convenience, this engine is equipped with Yamaha’s exclusive TotalTiltTM with tilt limiter, resulting in faster and easier engine tilting with a simple double push of the tilt up or down button.

The cowling has also received an upgrade with raised chrome graphics and restyled panels, adding to the XTO’s premium…

Base Model: XF450

Item Model Code: XF450NSA

See the Yamaha Details section for full specifications and features.

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Features

TotalTilt™ with Tilt Limiter

Yamaha’s exclusive TotalTilt™ feature provides faster and easier engine tilting, using a simple double push of the tilt up or tilt down buttons. The built-in tilt limiter automatically stops the engine tilt at a set point, to prevent the engine hitting any objects. 

Phase Angle Control Charging System

Featuring three-phase, simultaneous charging, this system produces more net amps at a low RPM – up to 96 net amps (102 Gross) – meeting the extreme demand for devices like gyro stabilisers, air conditioning, sounds systems and more. This net output is per outboard and is stackable for each outboard, meaning you can achieve up to 480 net amps for quad applications. 

Helm Master EX Prop Light

This optional feature is available when matched to Yamaha’s exclusive Helm Master EX autopilot and joystick system. The light mounts directly in the rear apron of the outboard, providing a visual safety warning when a Helm Master EX SetPoint mode is active.

Built-In Digital Electric Steering (DES)

Yamaha’s built-in Digital Electric Steering (DES) is neat and compact, and delivers smoother, faster, and more precise steering – with additional capabilities. Removes need for steering pumps, hoses, hydraulic lines and bleeding procedures – for less clutter in the bilge area. F250 DES and F300 DES Models only. Bolt-on option available for all other models. 

Bold New Cowling Design

The cowling has received an upgrade with raised chrome graphics and restyled panels, adding to the XTO’s premium look while embodying the extreme power of this outboard. A new flush-mounted flushing connection has been added to the front of the engine.

Helm Master® EX Control System

Helm Master® EX is an industry-first fully integrated digital boat control system that delivers next level control over your boat for increased boating and fishing enjoyment. Now available for single and multiple outboard engine applications.

5559CC V8 Engine

The massive 5.6 Litre, 32 valve, direct fuel-injection, four-stroke engine delivers enough power to push large and heavy offshore boats. The self-tensioning chain immersed in an oil bath ensures quiet, maintenance free and consistent valve timing.

Yamaha Outboard Tech

Yamaha offers a range of rigging options to suit every boat. Check out the full suite of controls, gauges, switches, props and other technologies, plus outboard performance data.

Integrated Electric Steering

This industry first ‘steer-by-wire’ system uses an electric motor to directly move and secure the outboard, without any hydraulics or electric pump. This delivers very fast, precise, leak free and maintenance-free steering – that uses less power and is packaged in a clean rigging set-up.

Fully Integrated Power System

The fully integrated power system creates a truly effortless boating experience. The system combines integrated electric steering, ‘drive-by-wire’ throttle controls, Yamaha’s premium CL7 multifunction display and Helm Master joystick docking and positioning controls.

Direct Fuel Injection

First four-stroke outboard to use direct fuel injection in the outboard industry. A three stage fuel pump system sprays fuel at high pressure directly into the combustion chamber, resulting in better fuel burn, more power and improved fuel efficiency.  

In-Water Gear Lube Servicing

The draining and replacement of the lower unit gear lubricant can occur while the boat is docked on the water, making the servicing of larger boats easier, quicker and cheaper.

Multi-Part Cowling System

By designing the cowling in separate, easily removable parts – getting to specific sections of the outboard for servicing is now quicker and easier. This new cowling design also makes it possible to service larger boats while they are docked on the water.   

Redesigned Lower Unit

The hydrodynamically designed, oversized gear case enables higher maximum speeds and greater stability when turning. The high quality marine grade stainless steel components and hardened gears have been designed to handle extreme loads and highly corrosive marine environments.

Plasma Fusion Cylinders

The plasma fusion process creates a cylinder wall surface that is 60% harder than steel, removing the need for conventional steel cylinder sleeves. This significantly reduces weight, improves fuel efficiency and increases the engine capacity, resulting in an improved power-to-weight performance.

Thrust Enhancing Exhaust Routing

Blade slippage is decreased significantly when in reverse due to the exhaust gases being ducted through a ‘relief’ bypass located above the anti-cavitation plate. This improves braking capacity and reduces vibrations through the boat.

Digital Boat Control System

Helm Master® EX is an industry-first fully integrated digital boat control system that delivers next level control over your boat for increased boating and fishing enjoyment. Now available for single and multiple outboard engine applications.

Yamaha Shift Dampener System

Many of Yamaha’s mid-range and high horsepower props come with Yamaha’s exclusive Shift Dampener System (SDS). This system absorbs forces created when an engine shifts in and out of gear, resulting in a quieter, smoother and ‘clunk free’ shifting.

XTO OS Series SDS Propeller

Exclusively designed for the XTO Offshore outboard, the specially designed large surface area blades generate extreme thrust for excellent acceleration, cruising, top-end speed and reduced ventilation. Includes Yamaha’s Shift Dampening System (SDS) for quieter, smoother and ‘clunk free’ gear shifting.

Technical Specification

  • Engine 4-Stroke, 32 Valve DOHC Direct V8
  • Displacement 5559.0
  • Bore 96 x 96
  • Lubrication Wet-sump
  • Fuel EFI
  • Ignition TCI
  • Starter Electric