Yamaha 450HP XF450USA XTO Offshore Outboard, 30″ Shaft, Digital Control
The Yamaha XF450USA is a 450HP 5.6L V8 four-stroke outboard motor featuring a 30-inch ultra-long shaft and integrated digital electronic control systems.
- Engine type: Four-stroke V8 5.6L DOHC block.
- Fuel system: High pressure direct fuel injection.
- Shaft length: 30 inch ultra-long shaft size.
- Gearcase: Standard right-hand rotation gearcase.
- Control: Integrated digital electronic steering system.
Description
Yamaha XF450USA 450HP Outboard Motor
The Yamaha 450HP XF450USA solves inefficient fuel atomization and transom drag through a high-precision direct injection system designed for heavy offshore fishing vessels. This model addresses mechanical power loss by utilizing integrated electric steering and an optimized 1.79:1 gear ratio for superior hole shots. Generating massive thrust from its 5.6L V8 architecture, the engine maintains peak performance during long-range transit. Hydrodynamic lower units are specifically profiled to cut water resistance, maximizing top-end speed while maintaining the fuel economy required for commercial and recreational maritime operations.
Yamaha 450HP XF450USA achieves EPA Tier 3 certification to ensure that it meets stringent environmental regulations without compromising the 450HP output required for deep-sea navigation. The integration of sacrificial anodes and YDC-30 aluminum alloy provides a primary defense against electrolytic saltwater corrosion in the cooling passages. A 90-amp alternator provides consistent electrical current for high-draw navigational suites and livewell systems during extended idling. This thermal management strategy ensures that internal engine temperatures remain within optimal parameters during high-stress propulsion tasks in tropical environments.
Key Features of Yamaha 450HP XF450USA
- 450HP 4-stroke delivers consistent low-end torque
- Electronic Fuel Injection cuts fuel consumption 15%
- 977 lbs chassis optimizes transom weight distribution
- 30 inch shaft clears deep-V transoms
- Electric start ensures instantaneous cold weather ignition
- Dual chamber cooling prevents internal saltwater corrosion
- 5 year warranty includes nationwide service network
Yamaha 450HP XF450USA Gray XTO Specs
| Brand | Yamaha |
| Full Model Code | XF450USA |
| Country of Origin | Japan |
| Engine Family/Series | XTO Offshore® V8 (Gray Standard Rotation) |
| Engine Type | V8 60° / 32-Valve DOHC / 4-Stroke |
| Displacement | 5.6 Liters (5559 cc) |
| Horsepower | 450 HP @ 6000 RPM |
| Full Throttle RPM Range | 5000 - 6000 RPM |
| Fuel Induction System | Direct Injection (Up to 2900 PSI) / VCT |
| Alternator Output | 102 Amp Gross (96 Net Amps @ Idle) |
| Gear Ratio | 1.79:1 |
| Shaft Length | 30" (U-Long) |
| Dry Weight | 448 kg (988 lbs) |
| Bore x Stroke | 96 x 96 mm |
| Starting & Steering System | Electric w/ Integrated Digital Electric Steering (DES) |
| Trim/Tilt Method | TotalTilt™ Power Trim & Tilt |
| Oil Capacity | 7.8L (with filter) |
| Recommended Fuel | 89 Octane (Unleaded) |
| Standard Warranty | 5-Year Pleasure / 1-Year Commercial |
| Application | Mid-to-large offshore vessels and cruisers (32' - 42'). |
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