XTO OFFSHORE
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.
Meet the Lineup
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 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
450 HP
Engine Comparison
| 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) |
| Intake | 32-valve |
| Ignition | TCI Microcomputer |
| Spark Plug | ILMAR7E-9 / Iridium |
| 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 |
† 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).
450 HP
Compatible Controls
Compatible Gauges
Prop Selector
Enter your details. Find the right prop. Easily zero-in on the best propeller options based on your type of craft, horsepower and performance goals with this smart, online tool.
visit yamaha prop selector
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Regal LX36 LXF450XSA / XF450XSA View |
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Sea Fox 368 Commander XF450USA2 / LXF450USA2 View |
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Sportsman Open 322 XF450XSA2 / LXF450XSA View |
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World Cat 400 CC XF450XSA2 / LXF450XSA2 View |
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Jeanneau Leader 10.5 CC XF450USA2 / LXF450USA2 View |
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Jeanneau DB/37 XF450USA2 / LXF450USA2 View |
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Sportsman Heritage 261 XF450USA2 View |
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Sportsman Masters 267 XF450XSA2 View |
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Hurricane SunDeck 2690 XF450XSA2 View |
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Cobia 330 DC LXF450XSA2 / XF450XSA2 View |
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Cobia 320 CC LXF450XSA2 / XF450XSA2 View |
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Regulator 26XO XF450XSA View |
| Boat Model: Engine: Bulletin: |
Regulator 31CC LXF450XSA2 / XF450XSA2 View |
| Boat Model: Engine: Bulletin: |
Regulator 34CC XF450XSA2 / LXF450XSA2 View |
| Boat Model: Engine: Bulletin: |
Regulator 37CC XF450XSA2 / XF450ESA2 / LXF450XSA2 View |
| Boat Model: Engine: Bulletin: |
Regulator 41CC with Tower LXF450XSA2 / XF450ESA2 / LXF450ESA2 / XF450XSA2 View |
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G3 Amara XF450XSA View |
| Boat Model: Engine: Bulletin: |
Grady White 386 Canyon LXF450XSA / XF450USA / XF450XSA View |
| Boat Model: Engine: Bulletin: |
Pursuit OS405 LXF450XSA2 / XF450USA2 / XF450XSA2 View |
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Veranda VX27RCT XF450XSA View |
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Jupiter 40 LXF450XSA2 / XF450ESA2 / XF450XSA2 View |
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Southport 38 FE LXF450USA2 / XF450ESA2 / XF450USA2 View |
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Bay Rider 269 XF450XSA2 View |
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Pursuit OS355 LXF450XSA2 / XF450XSA2 View |
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Caymas 34CT LXF450USA2 / XF450USA2 View |
| Boat Model: Engine: Bulletin: |
Scout 330 LXF XF450USA4 / LXF450USA4 View |
| Boat Model: Engine: Bulletin: |
Valhalla V-28 Bay XF450USA2 View |
| Boat Model: Engine: Bulletin: |
Grady White 345 Freedom LXF450XSA4 / XF450XSA4 View |
| Boat Model: Engine: Bulletin: |
SeaHunter 45 VTS LXF450XSA / LXF450USA / XF450USA / XF450XSA View |
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Scout 357 LXF LXF450USA4 / XF450USA4 View |
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Valhalla V-41 LXF450XSA2 / XF450USA2 / XF450XSA2 View |
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Viaggio Diamante 26UWA XF450XSA View |
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Grady White 415 Freedom LXF450XSA4 / XF450ESA4 / LXF450ESA4 / XF450XSA4 View |
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Sportsman Heritage 321 XF450USA2 / LXF450USA2 View |
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Islamorada Morada 27 XF450XSA2 View |
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VX285DCRCT XF450XSA View |
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Tidewater 330 CC XF450USA2 / LXF450USA2 View |
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Evotti 725CS XF450XSA2 View |
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Bennington 27QXSBWAT2 LXF450XSA2 / XF450XSA2 View |
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WHITE
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GRAY
<p>HARNESS THE POWER WITH HELM MASTER<sup>®</sup> EX</p>
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.
Learn More
Features & Benefits
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 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.
RELIABILITY & DURABILITY
Carbon-Coated Lifters
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