Yamaha Outboards 425HP | LXF425USB

Yamaha LXF425USB Outboard: Counter-Rotating 425HP XTO Offshore for Deep Transoms

Achieve the ultimate in offshore performance with the Yamaha LXF425USB outboard. This monumental 425-horsepower V8 XTO Offshore engine is precisely engineered for maximum power and exceptional thrust. It serves as a premier power solution for the largest and most demanding offshore vessels. Its counter-rotating (left-hand) rotation makes it the ideal companion for a standard rotating (XF) outboard in multi-engine setups. This ensures balanced steering and optimal boat handling.

The LXF425USB is built around Yamaha’s formidable 5.6-liter direct injection V8 powerhead. This design guarantees both immense power and superior fuel efficiency. With an extra-long 30-inch (U) shaft length, this model is perfectly suited for boats featuring deeper transoms. This provides optimal propeller immersion and consistent performance, even in challenging open-water conditions. The “SB” designation signifies its state-of-the-art integrated Digital Electric Steering (DES) and full Helm Master EX® compatibility. Furthermore, this latest iteration boasts refined aesthetics and functional upgrades. It thus establishes a truly dominant and sophisticated presence on your transom.

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Balanced Performance and Integrated Control for Demanding Offshore Journeys

The Yamaha LXF425USB is purpose-built for harmonious integration in multi-engine configurations. Its counter-rotating (left-hand) rotation is vital for offsetting propeller torque. This is particularly important when paired with a standard rotating (XF) outboard. This configuration provides a neutral steering feel and enhanced maneuverability. Consequently, it creates a perfectly balanced propulsion system. This excels in diverse offshore conditions, from high-speed runs to precise docking.

Beyond its impressive 425HP V8 strength, the LXF425USB provides an extraordinary level of integrated boat control. The integrated Digital Electric Steering (DES) offers smooth, immediate steering response. This eliminates the need for external hydraulic lines. Consequently, rigging complexity is significantly reduced. It also boosts overall reliability. When combined with Yamaha’s Helm Master EX® system, boaters gain access to intuitive joystick control. They also benefit from advanced autopilot features and innovative SetPoint™ modes. These collectively redefine the offshore experience. For instance, maintaining position over a fishing spot becomes remarkably easy. The LXF425USB also features modern aesthetic and functional refinements, ensuring your boat not only performs exceptionally but also turns heads.

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Key Features of the LXF425USB: Engineering for Extreme Offshore Demands

Explore the advanced technologies, robust engineering, and meticulous design details. These factors establish the Yamaha LXF425USB as a premier choice for high-performance offshore applications.

Counter-Rotating (Left-Hand) Rotation

The “LXF” in LXF425USB signifies its counter-clockwise (left-hand) rotation. This makes it an essential component in multi-engine installations. It perfectly balances the torque of a standard rotating (XF) outboard. This leads to superior handling and efficiency.

Direct Injection 5.6L V8 Engine

At the core of the LXF425USB is its massive 5.6-liter, 32-valve V8 engine. It features Direct Fuel Injection. This sophisticated system atomizes fuel. It then delivers it directly into the combustion chamber under high pressure. This maximizes power output. It also improves fuel economy. Moreover, it ensures cleaner emissions across the entire RPM range.

Integrated Digital Electric Steering (DES)

Experience precise and effortless steering. Benefit from a clean, uncluttered transom. The LXF425USB features Digital Electric Steering (DES) integrated directly into the outboard’s bracket. This innovative design eliminates external hydraulic components. Consequently, rigging complexity is reduced. It also provides smooth, immediate steering response. This enhances control and reliability.

High-Output Phase Angle Control (PAC) Charging System

Power all your sophisticated onboard electronics with unwavering confidence. The LXF425USB incorporates an advanced Phase Angle Control charging system. It delivers an outstanding 96 net amps at idle (102 gross amps). This robust output ensures that even with numerous demanding accessories, your batteries remain charged. For instance, gyro stabilizers, air conditioning, and premium sound systems run flawlessly, even at low RPMs.

Extra-Long 30-inch (U) Shaft Length

The “U” in LXF425USB indicates its specific 30-inch (767mm) shaft length. This “ultra-long” shaft is engineered for boats with deeper transoms or those designed for a higher mounting position. It ensures optimal propeller immersion. This boosts performance and efficiency, particularly in multi-engine applications on larger offshore hulls.

Thrust Enhancing Reverse Exhaust (TERE)

Achieve exceptional control and precision in reverse. Yamaha’s TERE system cleverly diverts exhaust gases away from the propeller. This occurs at low RPMs (below 2,500). As a result, the propeller bites clean water. This significantly increases reverse thrust. It also greatly improves maneuverability for tasks like precise docking or backing down on fish.

TotalTilt™ for Effortless Operation

Simplify engine tilting with Yamaha’s exclusive TotalTilt™ feature. A quick double-tap of the trim/tilt button initiates a full tilt up or down. This makes trailering, mooring, and prop inspection quick and effortless. (Note: TotalTilt™ may be factory-defaulted to “OFF” for user preference, allowing activation as desired.)

Robust Durability and Service-Friendly Design

Built to withstand the harshest marine environments, the LXF425USB features heavy-duty construction. It has a multi-part cowling for easy access during maintenance. Innovative features, such as the in-water gear lube change system, further simplify routine service. This ensures maximum uptime and peace of mind.

Premium Aesthetic Enhancements

The current generation XTO Offshore outboards include subtle yet impactful design updates. These include raised chrome graphics on the cowling, a restyled rear panel, a flush-mounted manual flush connection, and hidden external wiring. Such features contribute to a cleaner, more premium look.

Technical Specifications: Yamaha LXF425USB

• Engine Type: 4-Stroke, 32-Valve, DOHC with VCT, 60° V8
• Prop Shaft Horsepower: 425 hp (317.1 kW) @ 5500 RPM
• Displacement: 5559 cm³ (5.6L)
• Fuel Induction System: Direct Fuel Injection (DFI)
• Alternator Output: 102 A (Gross), 96 A (Net @ Idle)
• Starting System: Electric Starter
• Steering: Integrated Digital Electric Steering (DES)
• Trim Control System: Power Trim and Tilt with TotalTilt™
• Gear Ratio: 1.79:1
• Shaft Length: U: 767 mm (30.2 inch)
• Dry Weight: Approx. 443 kg (977 lbs)
• Propeller Rotation: Counter-Clockwise (Left-Hand / Counter-Rotating)
• Recommended Fuel: Unleaded gasoline (minimum 89 octane)
• Controls: Digital Electronic Controls (DEC) – Required for full functionality and Helm Master EX compatibility.

Essential Accessories for Your LXF425USB

Maximize your outboard’s performance. Seamlessly integrate it with your boat’s systems. Use these genuine Yamaha accessories:

• Yamaha Helm Master EX® System Components: Complete your integrated control system. Get advanced joystick, autopilot, and SetPoint™ functionalities.
• Yamaha CL5 / CL7 Digital Displays: These premium touchscreen displays provide comprehensive engine data. They also offer intuitive system control.
• Yamaha XTO OS® Propellers: These propellers are specifically designed for the immense torque of the XTO Offshore. They optimize thrust and efficiency.
• Yamaha 10-Micron Water Separating Fuel Filter: Provide superior protection for your fuel system. This ensures long-term engine health and performance.

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Command the Horizon with Unmatched Power and Elegance

The Yamaha LXF425USB is more than just an outboard. It’s a meticulously engineered masterpiece. It is designed to deliver the ultimate offshore experience. With its extreme horsepower, counter-rotation for balanced rigging, integrated digital control, best-in-class charging, and refined aesthetic upgrades, this 425HP V8 XTO Offshore engine is the definitive choice for boaters. They demand the highest level of performance, reliability, and sophistication for their large offshore vessels.

Ready to transform your boating adventures with the ultimate in offshore power and control? Explore the Yamaha LXF425USB today. Contact our marine experts for current pricing and availability. Let us help you equip your boat with the ultimate in offshore propulsion.