Yamaha Outboards 350HP | LF350USA

Yamaha LF350USA Outboard: The Next-Generation 350HP V6 Counter-Rotating Offshore Powerhouse with 30-inch Shaft

Experience the cutting edge of offshore performance with the all-new Yamaha LF350USA outboard. This groundbreaking 350-horsepower V6 engine redefines big power in a remarkably lightweight package. Precisely engineered for exhilarating speed and immense torque, the LF350USA is the ideal choice for a wide range of large offshore vessels. Its counter-rotating (left-hand) rotation makes it the perfect companion for a standard rotating (F350USA) outboard in multi-engine setups. This ensures balanced steering and optimal boat handling.

The LF350USA is built around a newly upgraded 4.3-liter V6 engine block. This ensures not only incredible durability but also class-leading fuel efficiency. With an ultra-long 30-inch (U) shaft length, this model is perfectly suited for boats with higher transoms, often found on larger offshore center consoles or multi-engine setups requiring optimal propeller depth. This provides superior performance for a vast array of offshore applications. The “USA” designation signifies its state-of-the-art integrated Digital Electric Steering (DES) and full Helm Master EX® compatibility. This integration represents Yamaha’s latest advancements in intelligent boat control, offering an unparalleled level of precision and convenience. This model thus establishes a truly dominant and sophisticated presence on your transom.

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Balanced Performance and Seamless Control for Demanding Offshore Journeys

The Yamaha LF350USA represents a significant leap forward in outboard technology. Its new 4.3L V6 platform delivers a superior power-to-weight ratio. This makes it over 65 pounds lighter than its closest competitor while still producing formidable 350 horsepower. This lighter weight translates to improved boat performance and efficiency. It also broadens the range of boats it can power.

Beyond its impressive power, the LF350USA offers extraordinary integrated boat control. The integrated Digital Electric Steering (DES) eliminates external steering pumps and hydraulic lines. This results in a cleaner, uncluttered transom and exceptionally precise steering. When paired with Yamaha’s Helm Master EX® system, boaters gain access to intuitive joystick control, 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 LF350USA also features modern aesthetic and functional refinements, ensuring your boat not only performs exceptionally but also commands attention.

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Key Features of the LF350USA: Engineered for the Demands of the Open Water

Explore the advanced technologies, robust engineering, and meticulous design details. These factors establish the Yamaha LF350USA as a premier choice for high-performance offshore applications.

Counter-Rotating (Left-Hand) Rotation

The “LF” in LF350USA 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 (F350USA) outboard. This leads to superior handling and efficiency.

New 4.3L V6 Engine Block

The heart of the LF350USA is its entirely new 4.3-liter V6 engine block. This is a significant upgrade from previous 350hp models. It features larger intake and exhaust valves. It also boasts an 81mm electronic throttle valve. This boosts airflow and combustion. Consequently, it delivers robust torque across all RPMs.

Integrated Digital Electric Steering (DES)

Experience precise and effortless steering. Benefit from a clean, uncluttered transom. The LF350USA 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.

Exceptional Power-to-Weight Ratio

Weighing in at approximately 642 pounds (291 kg), the LF350USA boasts the best power-to-weight ratio in its class. This lighter design significantly improves boat performance. It also enhances fuel economy. Furthermore, it expands the range of suitable boat applications.

High-Output Charging System

Power all your sophisticated onboard electronics with unwavering confidence. The LF350USA’s advanced charging system produces up to 70 gross amps. More importantly, it delivers over 30 net amps at idle. This is nearly double the output of comparable outboards. This robust power ensures your batteries remain charged, even with multiple demanding accessories.

30-inch (U) Shaft Length

The “U” in LF350USA indicates its specific 30-inch (762mm) shaft length. This “ultra-long” shaft is a common choice for many larger offshore center console and walkaround boats. It provides optimal propeller immersion for multi-engine configurations. This boosts performance and efficiency.

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.)

Enhanced Durability and Serviceability

Built to withstand the harshest marine environments, the LF350USA features heavy-duty construction. It incorporates an upgraded gearcase with a redesigned clutch dog. This ensures stronger torque transfer. Plasma-fused sleeveless cylinder technology provides exceptional strength and reduces friction. An improved water sensor and increased oil cooler capacity further boost reliability.

Modern, Sleek Design

Inspired by the flagship XTO Offshore series, the LF350USA sports a fresh cowling design. It includes raised chrome graphics and a redesigned rear panel. A water-draining air duct and optimized cowling exhaust port keep components cool. This provides a clean, premium look while enhancing functionality.

Technical Specifications: Yamaha LF350USA

• Engine Type: 4-Stroke, 24-Valve, DOHC with VCT, 60° V6
• Prop Shaft Horsepower: 350 hp (257.4 kW) @ 5500 RPM
• Displacement: 4256 cm³ (4.3L)
• Fuel Induction System: Electronic Fuel Injection (EFI)
• Alternator Output: 70 A (Gross), 30+ A (Net @ Idle)
• Starting System: Electric Starter
• Steering: Integrated Digital Electric Steering (DES)
• Trim Control System: Power Trim and Tilt with TotalTilt™
• Gear Ratio: 1.75:1
• Shaft Length: U: 762 mm (30 inch)
• Dry Weight: Approx. 291 kg (642 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 LF350USA

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 Saltwater Series II® Propellers: Designed to complement the LF350’s power, these propellers optimize thrust and efficiency, especially in multi-engine setups.
• 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 LF350USA is more than just an outboard. It’s a meticulously engineered masterpiece. It is designed to deliver the ultimate offshore experience. With its class-leading power-to-weight ratio, counter-rotating design for balanced rigging, integrated digital control, best-in-class charging, and refined aesthetics, this 350HP V6 Offshore engine is the definitive choice for boaters. They demand the highest level of performance, reliability, and sophistication for their offshore vessels.

Ready to transform your boating adventures with the ultimate in offshore power and control? Explore the Yamaha LF350USA today. Contact our marine experts for current pricing and availability. Let us help you equip your boat with the ultimate in offshore propulsion.