Yamaha Outboards 300HP | LF300USB2

Yamaha Outboards 300HP | LF300USB2: Precision Control for Pinnacle Offshore Performance

The Yamaha Outboards 300HP | LF300USB2 .

Elevate your offshore command with the Yamaha LF300USB2 outboard motor. This 300HP V6 4-stroke engine is the crucial counter-rotation (left-hand) partner in multi-engine setups.

It is specifically designed for vessels requiring an ultra-long (30-inch) shaft. This powerhouse offers a commanding blend of raw horsepower and impressive fuel efficiency.

It features Yamaha’s legendary durability. Furthermore, its cutting-edge integrated Digital Electric Steering (DES) and seamless Helm Master EX® compatibility provide unparalleled precision and effortless control.

Consequently, the LF300USB2 is the indispensable choice for very large center consoles, substantial offshore fishing boats, and premium cruisers demanding optimal propeller submersion and perfectly synchronized power.

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Why the Yamaha LF300USB2 Perfects Your High-Transom, Multi-Engine Rig

The Yamaha LF300USB2 is a specialized powerhouse, purpose-built to harmonize with a standard rotation outboard (like the F300USB2). This counter-rotating configuration fundamentally transforms the handling of larger vessels. It precisely cancels out propeller torque. This results in dramatically improved steering ease and enhanced straight-line tracking. Low-speed maneuverability is also superior. Crucially, the integration of Digital Electric Steering (DES) and compatibility with Helm Master EX® elevates this control to an entirely new level. It offers joystick maneuverability, autopilot functions, and set point capabilities. This makes docking, fishing, and long-distance cruising more effortless and enjoyable than ever before on tall-transom boats.

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Key Features & Benefits: Mastering the Deep with Digital Precision and Balance

Let’s explore the groundbreaking technologies and thoughtful engineering that make the LF300USB2 a critical component for high-performance multi-outboard setups.

Potent 4.2L Big-Bore V6 for Unrivaled Output

At the very heart of the LF300USB2 is a formidable 4.2L (4169cc) 60-degree V6 engine. This “big-bore” displacement is achieved through an advanced thermally applied plasma fusion process on the cylinder walls. This innovative process eliminates conventional steel cylinder sleeves. Instead, the cylinder walls are an impressive 60% harder than steel. Consequently, this allows for larger cylinder bores. This means significantly more power and torque without increasing outer engine dimensions. This design also contributes to lighter weight, superior cooling, and reduced internal friction. All these factors enhance both performance and long-term reliability. Therefore, expect immediate, exhilarating power delivery whenever you demand it.

Integrated Digital Electric Steering (DES) for Ultimate Control

A standout feature of the LF300USB2 is its integrated Digital Electric Steering (DES). This revolutionary system completely eliminates traditional hydraulic steering hoses and pumps from the bilge. Instead, steering commands are transmitted digitally. This results in:

• Smoother, More Precise Steering: Experience effortless, highly responsive steering with pinpoint accuracy. This is vital for commanding large vessels in varying conditions.
• Cleaner Rigging: A significantly clutter-free transom and bilge area. This is due to the absence of bulky hydraulic lines, enhancing aesthetics and simplifying maintenance.
• Reduced Power Consumption: DES draws less power from your batteries compared to conventional hydraulic systems. This optimizes your boat’s electrical load.
• Enhanced Reliability: Fewer components mean less to maintain and fewer points of potential failure. This provides greater peace of mind on long offshore runs.

This integrated design is a game-changer for multi-engine installations on larger boats.

Seamless Helm Master EX® Integration

The LF300USB2 is fully compatible with Yamaha’s optional Helm Master EX® boat control system. When configured with a standard rotation F300USB2 and the Helm Master EX joystick, this advanced system unlocks a suite of revolutionary capabilities:

• Joystick Control: Experience unprecedented ease of docking and precise maneuvering in tight spaces. This includes sideways movement and on-axis rotation.
• Autopilot Functionality: Features like Course Hold, Heading Hold, and Track Point for hands-free navigation on long stretches.
• SetPoint™ Modes: StayPoint™, FishPoint™, and DriftPoint™ automatically maintain your boat’s position or heading. This revolutionizes fishing, waiting at docks, or holding position in current.
• Pattern Steer: Pre-programmed fishing patterns for precise lure presentation and efficient searching.

This comprehensive integration transforms your boating experience. It offers unparalleled control and convenience for high-performance vessels.

Ultra-Long (30-inch) Shaft for Optimal Submersion

The 30-inch (767mm) shaft length of the LF300USB2 is specifically engineered for boats with a tall transom. This extended shaft ensures the propeller remains deeply submerged. This minimizes ventilation and cavitation in rough water. This results in:

• Improved Propeller Bite: Consistent thrust and efficiency, even when operating in challenging sea states.
• Enhanced Stability: Better handling and less porpoising by keeping the prop securely in the water.
• Ideal Fit: Perfect for custom-built offshore vessels, large center consoles, and specialized vessels designed for this transom height.

Precision Counter-Rotation for Enhanced Balance

The LF300USB2’s left-hand (counter-clockwise) propeller rotation is paramount for multi-engine configurations. When precisely paired with a standard right-hand rotation F300USB2, the opposing forces generated by the propellers effectively neutralize each other. This dramatically reduces steering effort, eliminates prop walk, and results in a more stable, balanced, and comfortable ride. It provides superior straight-line tracking and enhanced maneuverability, particularly at low speeds and in reverse.

Exceptional Fuel Efficiency for Extended Range

Despite its commanding power, the LF300USB2 boasts outstanding fuel efficiency. Its Precision Multi-Point Electronic Fuel Injection (EFI) system ensures precise fuel metering. It optimizes combustion for excellent economy. This intelligent system, combined with friction-reducing micro-textured cylinder walls, delivers superb fuel economy across the entire RPM range. Thus, you can extend your cruising range. Spend more time enjoying the water, and less time at the fuel dock.

High-Output Charging for Extensive Electronics

Modern, well-equipped boats demand substantial electrical power. The LF300USB2 impressively produces up to 70 gross amps of charging power. This ample output reliably powers your growing array of onboard electronics. This includes multiple fish finders, sophisticated navigation systems, and other high-demand accessories. Furthermore, this ensures all your critical systems remain fully operational throughout your longest trips.

Smooth, Quiet, and Refined Operation

Yamaha engineers have meticulously refined the LF300USB2 for an impressively smooth and quiet boating experience. Engine exhaust gases are strategically routed. They pass through a labyrinth of passages. Then, they exit via an idle exhaust relief outlet, significantly reducing sound. The design minimizes vibration and noise, creating a more comfortable and enjoyable time on the water, even during extended journeys.

Built for Unwavering Durability and Smart Maintenance

The LF300USB2 is inherently built tough. It withstands the rigors of heavy use and harsh marine environments. Its advanced cowling drain system efficiently drains any water. This protects crucial internal components. Incoming air routes through a labyrinth of passages. These effectively trap and drain water, ensuring maximum reliability. Additionally, the outboard features Thrust Enhancing Reverse Exhaust (TERE). This innovative system keeps exhaust bubbles away from the propeller. This occurs below 2500 RPM and when in reverse. This means the prop bites only clean water, resulting in outstanding reverse thrust and control. This is especially helpful when backing down on fish or maneuvering in tight spaces.

For ultimate convenience, the LF300USB2 includes Yamaha’s exclusive TotalTilt™ Feature. A swift double-tap of the trim button performs a full tilt up or down. This makes trailering and shallow water navigation incredibly quick. This feature is also handy for propeller changes or docking.

Optimize Your Rig with Genuine Yamaha Accessories:

To truly unlock your LF300USB2’s full potential, especially in a multi-engine setup, consider integrating these genuine Yamaha accessories:

• Yamaha Helm Master EX® System Components: Expand your control with a joystick, autopilot, and set point features for the ultimate boating experience. This is crucial for fully leveraging the LF300USB2’s capabilities on large vessels.
• Yamaha CL5 or CL7 Digital Displays: These touchscreen displays provide comprehensive engine data, navigation, and seamless control for Helm Master EX features.
• Saltwater Series II™ HP Propellers: These high-performance propellers are specifically designed to complement Yamaha’s V6 Offshore outboards. They offer excellent performance and feature the Shift Dampener System (SDS®) for smoother, quieter shifting. Ensure you select a left-hand rotation propeller for the LF300USB2 and the correct pitch/diameter for your specific boat.
• Yamaha 10-Micron Water Separating Fuel Filter: This external filter works with the on-engine filter. It provides superior protection against water and contaminants. Consequently, it further enhances reliability and extends engine longevity.

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Power Your Journey: The Yamaha LF300USB2 Advantage

The Yamaha LF300USB2 is more than just a powerful outboard; it’s a precisely engineered component for sophisticated multi-engine boat systems. It embodies Yamaha’s legacy of uncompromising quality, advanced engineering, and unwavering reliability. With its potent 300HP, integrated Digital Electric Steering, ultra-long shaft, and seamless Helm Master EX® compatibility, it offers an unmatched level of control, convenience, and confidence on the water. It’s the ideal choice for boaters who operate very large, high-transom vessels and demand cutting-edge technology paired with Yamaha’s legendary reliability.

Ready to experience the confident power and precision control of the Yamaha LF300USB2 for yourself? Contact us today to discuss your specific multi-engine boating requirements and discover how this advanced outboard can transform your time on the water. Get a personalized quote. Or, explore our full selection of Yamaha outboards. Our dedicated team is here to help you find the ideal power solution for your next marine adventure! Here’s the detailed, informational, and SEO-optimized content for the Yamaha Outboards 300HP | LF300USB2 for your e-commerce website, with technical specifications listed just once.

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Yamaha Outboards 300HP | LF300USB2: Precision Control for Grand Vessels

Command the most expansive waters with the Yamaha LF300USB2 outboard motor. This 300HP V6 4-stroke engine is meticulously engineered as the essential counter-rotation (left-hand) partner for twin or triple-engine installations on boats with very tall transoms. It seamlessly integrates a robust power delivery system with advanced Digital Electric Steering (DES) and full Helm Master EX® compatibility. Consequently, the LF300USB2 is the ultimate choice for large offshore fishing yachts, multi-engine center consoles, and luxury cruisers that demand an ultra-long 30-inch shaft for optimal propeller submersion, unparalleled handling, and a sophisticated, clutter-free rigging system.

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Why the Yamaha LF300USB2 is Indispensable for Large, Multi-Engine Rigs

The Yamaha LF300USB2 is a highly specialized and technologically advanced outboard designed for seamless operation on the largest recreational vessels. Its unique combination of counter-rotation and an ultra-long 30-inch shaft is crucial for maintaining optimal propeller bite and boat stability, especially in rough offshore conditions where larger boats with high freeboard operate. When paired with a standard rotation F300USB2, this setup effectively cancels out propeller torque, dramatically improving steering ease and straight-line tracking. The integrated Digital Electric Steering (DES) and Helm Master EX® compatibility then elevate this precise balance with joystick control, autopilot features, and effortless maneuverability, transforming the experience of handling a grand vessel.

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Key Features & Benefits: Powering Your Command with Digital Precision and Balanced Thrust

Let’s explore the groundbreaking technologies and thoughtful engineering that make the LF300USB2 an industry leader for high-performance, multi-outboard setups on large boats.

Potent 4.2L Big-Bore V6 for Unrivaled Output

At the very heart of the LF300USB2 is a formidable 4.2L (4169cc) 60-degree V6 engine. This “big-bore” displacement is achieved through an advanced thermally applied plasma fusion process on the cylinder walls. This innovative process eliminates conventional steel cylinder sleeves. Instead, the cylinder walls are an impressive 60% harder than steel. Consequently, this allows for larger cylinder bores. This means significantly more power and torque without increasing outer engine dimensions. This design also contributes to lighter weight, superior cooling, and reduced internal friction. All these factors enhance both performance and long-term reliability. Therefore, expect immediate, exhilarating power delivery whenever you demand it.

Integrated Digital Electric Steering (DES) for Ultimate Control

A defining feature of the LF300USB2 is its integrated Digital Electric Steering (DES). This revolutionary system completely eliminates traditional hydraulic steering hoses and pumps from the bilge. Instead, steering commands are transmitted digitally. This results in:

• Smoother, More Precise Steering: Experience effortless, highly responsive steering with pinpoint accuracy, vital for commanding very large vessels in varying conditions.
• Cleaner Rigging: A significantly clutter-free transom and bilge area due to the absence of bulky hydraulic lines, enhancing aesthetics and simplifying maintenance.
• Reduced Power Consumption: DES draws less power from your batteries compared to conventional hydraulic systems, optimizing your boat’s electrical load.
• Enhanced Reliability: Fewer components mean less to maintain and fewer points of potential failure, providing greater peace of mind on long offshore runs.

This integrated design is a game-changer for sophisticated multi-engine installations.

Seamless Helm Master EX® Integration

The LF300USB2 is fully compatible with Yamaha’s optional Helm Master EX® boat control system. When configured in a multi-engine setup with the Helm Master EX joystick, this advanced system unlocks a suite of revolutionary capabilities:

• Joystick Control: Experience unprecedented ease of docking, precise maneuvering in tight spaces, and fine-tuned boat positioning, including sideways movement and on-axis rotation, all with fingertip control.
• Autopilot Functionality: Features like Course Hold, Heading Hold, and Track Point for hands-free navigation on long stretches.
• SetPoint™ Modes: StayPoint™, FishPoint™, and DriftPoint™ automatically maintain your boat’s position or heading, revolutionizing fishing, waiting at docks, or holding position in current.
• Pattern Steer: Pre-programmed fishing patterns for precise lure presentation and efficient searching.

This comprehensive integration transforms your boating experience, offering unparalleled control and convenience for high-performance, multi-engine vessels.

Ultra-Long (30-inch) Shaft for Optimal Submersion

The 30-inch (767mm) shaft length of the LF300USB2 is specifically engineered for boats with a tall transom. This extended shaft ensures the propeller remains deeply submerged, minimizing ventilation and cavitation in rough water. This results in:

• Improved Propeller Bite: Consistent thrust and efficiency, even when operating in challenging sea states, ensuring optimal performance from your multi-engine setup.
• Enhanced Stability: Better handling and reduced porpoising by keeping the props securely in the water.
• Ideal Fit: Perfect for custom-built offshore vessels, very large center consoles, and specialized pontoon boats designed for this transom height.

Precision Counter-Rotation for Enhanced Balance

The LF300USB2’s left-hand (counter-clockwise) propeller rotation is paramount for multi-engine configurations. When precisely paired with a standard right-hand rotation F300USB2, the opposing forces generated by the propellers effectively neutralize each other. This dramatically reduces steering effort, eliminates prop walk, and results in a more stable, balanced, and comfortable ride. It provides superior straight-line tracking and enhanced maneuverability, particularly at low speeds and in reverse, which is crucial when docking or backing down on fish with a large boat.

Exceptional Fuel Efficiency for Extended Range

Despite its commanding power, the LF300USB2 boasts outstanding fuel efficiency. Its Precision Multi-Point Electronic Fuel Injection (EFI) system ensures precise fuel metering. It optimizes combustion for excellent economy. This intelligent system, combined with friction-reducing micro-textured cylinder walls, delivers superb fuel economy across the entire RPM range. Thus, you can extend your cruising range. Spend more time enjoying the water, and less time at the fuel dock.

High-Output Charging for Extensive Electronics

Modern, well-equipped boats demand substantial electrical power. The LF300USB2 impressively produces up to 70 gross amps of charging power. This ample output reliably powers your growing array of onboard electronics. This includes multiple fish finders, sophisticated navigation systems, and other high-demand accessories. Furthermore, this ensures all your critical systems remain fully operational throughout your longest trips.

Smooth, Quiet, and Refined Operation

Yamaha engineers have meticulously refined the LF300USB2 for an impressively smooth and quiet boating experience. Engine exhaust gases are strategically routed. They pass through a labyrinth of passages. Then, they exit via an idle exhaust relief outlet, significantly reducing sound. The design minimizes vibration and noise, creating a more comfortable and enjoyable time on the water, even during extended journeys.

Built for Unwavering Durability and Smart Maintenance

The LF300USB2 is inherently built tough. It withstands the rigors of heavy use and harsh marine environments. Its advanced cowling drain system efficiently drains any water. This protects crucial internal components. Incoming air routes through a labyrinth of passages. These effectively trap and drain water, ensuring maximum reliability. Additionally, the outboard features Thrust Enhancing Reverse Exhaust (TERE). This innovative system keeps exhaust bubbles away from the propeller. This occurs below 2500 RPM and when in reverse. This means the prop bites only clean water, resulting in outstanding reverse thrust and control. This is especially helpful when backing down on fish or maneuvering a large vessel in tight spaces.

For ultimate convenience, the LF300USB2 includes Yamaha’s exclusive TotalTilt™ Feature. A swift double-tap of the trim button performs a full tilt up or down. This makes trailering and shallow water navigation incredibly quick. This feature is also handy for propeller changes or docking.

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Technical Specifications Yamaha Outboards 300HP | LF300USB2  (Yamaha LF300USB2 – Ultra-Long Shaft, Counter-Rotation, with DES):

• Engine Type: 4-Stroke, 24-Valve, DOHC with VCT, 60-degree V6
• Prop Shaft Horsepower: 300 hp (223.9 kW)
• Displacement: 4169 cm³ (4.2L)
• Bore x Stroke: 96.0 x 96.0 mm
• Full Throttle Operating Range: 5000-6000 r/min
• Fuel Induction System: Electronic Fuel Injection (EFI)
• Lubrication System: Wet Sump
• Engine Oil Capacity: 6.7 L (with filter)
• Alternator Output: 70 A (gross, 55A battery charging)
• 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: 767 mm (30.2 inch) – This 30-inch ultra-long shaft length is specifically for boats with a tall transom, ensuring proper propeller submersion in all conditions.
• Dry Weight: 293 kg (646 lbs) – Weight includes integrated DES.
• Propeller Rotation: Counter-clockwise (Left-hand rotation) – Essential for twin/triple engine installations with a standard F300USB2 to neutralize torque and improve handling.
• Ignition System: TCI Micro-computer
• Recommended Fuel: Unleaded gasoline (minimum 87 octane)
• Cooling System: Raw-water, thermostatically controlled
• Exhaust System: Through propeller hub (with Thrust Enhancing Reverse Exhaust)
• Controls: Digital Electronic Controls (DEC) – Required for DES functionality and Helm Master EX integration.

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Optimize Your Rig with Genuine Yamaha Accessories:

To truly unlock your LF300USB2’s full potential in a multi-engine setup, consider integrating these genuine Yamaha accessories:

• Yamaha Helm Master EX® System Components: Crucial for leveraging the full capabilities of the LF300USB2, including joystick control, autopilot, and SetPoint™ features for ultimate boat control.
• Yamaha CL5 or CL7 Digital Displays: These touchscreen displays provide comprehensive engine data, navigation, and seamless control for Helm Master EX features.
• Saltwater Series II™ HP Propellers: These high-performance propellers are specifically designed to complement Yamaha’s V6 Offshore outboards. They offer excellent performance and feature the Shift Dampener System (SDS®) for smoother, quieter shifting. Ensure you select a left-hand rotation propeller with the appropriate pitch and diameter for the LF300USB2.
• Yamaha 10-Micron Water Separating Fuel Filter: This external filter works with the on-engine filter. It provides superior protection against water and contaminants. Consequently, it further enhances reliability and extends engine longevity.

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Power Your Journey: The  Advantages of Yamaha Outboards 300HP | LF300USB2

The Yamaha LF300USB2 is not merely a powerful outboard; it is a sophisticated, precision-engineered component for the most demanding multi-engine boat systems. It embodies Yamaha’s legacy of uncompromising quality, advanced engineering, and unwavering reliability. With its potent 300HP, integrated Digital Electric Steering, ultra-long shaft, counter-rotation, and seamless Helm Master EX® compatibility, it offers an unmatched level of control, convenience, and confidence on the water. It’s the ideal choice for boaters who operate very large vessels and demand cutting-edge technology paired with Yamaha’s legendary performance.

Ready to experience the confident power and precision control of the Yamaha LF300USB2 for yourself? Contact us today to discuss your specific multi-engine boating requirements and discover how this advanced outboard can transform your time on the water. Get a personalized quote. Or, explore our full selection of Yamaha outboards. Our dedicated team is here to help you find the ideal power solution for your next marine adventure!