Yamaha LXF450USA 450HP Outboard – 30in Shaft, Counter Rotation, XTO
For paired rigs, Yamaha LXF450USA packs 450 horsepower. Built for twin installs, it counters prop torque on the opposite side. XTO backs up the rated output. Part of the XTO Offshore lineup.
- Rated at 450 horsepower
- Fits 30-inch transom height
- Counter-rotating gears for twin engines
- XTO fuel delivery system
- Straightforward to service and maintain
Description
Towering multi-engine transoms achieve flawless port-side stability when the Yamaha LXF450USA counter-rotates against heavy offshore currents. The massive 5.6-liter V8 block translates 2900 PSI direct fuel injection into brutal low-end torque, lifting heavily loaded coastal cruisers onto plane instantly. Measuring your exact twin-engine bracket guarantees this 30 inch counter rotating v8 outboard aligns securely without causing dangerous water pump starvation.
Eradicate exhausting steering friction at high speeds by relying on the integrated Digital Electric Steering actuators for immediate directional control. You pilot massive twin-engine catamarans with single-finger precision without installing leak-prone external hydraulic steering pumps. Engineers cast the 448 kg lower unit using specialized marine-grade aluminum alloys, creating a structural barrier that stops galvanic decay when executing an offshore twin engine repower for daily saltwater tournament use.
Key Features of Yamaha LXF450USA
- Counter-Rotating Gearcase: Cancels the massive lateral thrust of a starboard engine, keeping twin-engine performance hulls tracking perfectly straight underway.
- 30-Inch Ultra-Long Shaft: Drops the propeller deeply below high offshore transoms, maintaining solid forward thrust and preventing water pump starvation.
- 5.6-Liter V8 Block: Delivers brutal low-end torque from a massive 5559cc displacement, lifting extremely heavy fiberglass hulls onto plane instantly.
- Direct Fuel Injection: Atomizes fuel perfectly inside the cylinder at extreme pressure, delivering crisp throttle response and maximizing fuel efficiency.
- Integrated Digital Electric Steering: Eliminates messy external hydraulic cylinders completely, delivering sports-car-like handling and zero steering fatigue during long runs.
- 102-Amp Gross Alternator: Outputs massive charging power, keeping demanding radar systems and heavy-duty livewell pumps fully powered offshore.
- TotalTilt Power Trim: Adjusts the running angle actively via the binnacle switch, optimizing bow attitude across aggressive offshore swells.
- Variable Camshaft Timing: Shifts intake timing dynamically to boost low-end and midrange torque, maximizing acceleration for heavy twin-engine offshore boats.
- Anti-Corrosion Finish: Blocks severe galvanic decay physically, protecting the aluminum powerhead block across decades of daily saltwater exposure.
- Clean Four-Stroke Operation: Burns fuel with strict efficiency, ensuring peak performance while meeting modern clean-air environmental standards globally.
Why Choose Yamaha LXF450USA
This advanced 30-inch V8 acts strictly as a high-end fly-by-wire power plant designed for the port side of dual-engine applications requiring immense torque. Substituting a V6 model sacrifices critical displacement entirely. Upgrading your digital throttle syncing network is mandatory for smooth engine communication.
- Verify your twin-engine transom bracket accommodates a 30-inch shaft length safely.
- Link the DEC module to your master binnacle to synchronize shift commands perfectly.
- Keep coastal waters clean by running highly regulated four-stroke engine configurations.
Ideal Application and Vessel Fitment
This 450-horsepower drive-by-wire V8 is engineered strictly for ultra-heavy offshore vessels, massive luxury pontoons, and large multi-engine catamarans demanding a 30-inch shaft. Operating as a highly responsive digital drive, it translates electronic throttle data instantly, keeping twin-engine performance hulls tracking perfectly straight at high cruising speeds. It thrives in commercial offshore environments where balancing massive V8 thrust requires precise fly-by-wire power without sacrificing absolute reliability.
Warranty, Support and Maintenance
Authorized recreational operation receives a 5-Year Pleasure Warranty alongside exceptional factory support. Registered commercial applications fall under a strict 1-Year Commercial Warranty with separate terms applied to the block. Scheduled maintenance requires replacing gearcase lubricants and changing oil filters at manual-specified intervals. Always save all physical service records. Your engine serial number acts as the only way to source exact genuine replacement parts. Mulmotor provides product-information support before purchase and assistance with order-related questions.
Yamaha 450HP LXF450USA Specs
| Brand | Yamaha |
| Full Model Code | LXF450USA |
| Country of Origin | Japan |
| Engine Family/Series | XTO Offshore® V8 (Gray - Counter 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 DES |
| Trim/Tilt Method | TotalTilt™ Power Trim & Tilt |
| Oil Capacity | 7.8L (with filter) |
| Recommended Fuel | 89 Octane |
| Standard Warranty | 5-Year Pleasure / 1-Year Commercial |
| Application | Port-side installation for multi-engine offshore center consoles (32' - 45'). |












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