Yamaha LF115XB 115 HP Four-Stroke Outboard: Counter-Rotating Power for Multi-Engine Excellence

The Yamaha Outboards 115HP | F115XB.

Are you setting up a multi-engine boat, such as a large bay boat, center console, or twin-engine offshore vessel?

Perhaps you require not just significant power but also a counter-rotating propeller to enhance handling and performance. Specifically, do you need a 115 horsepower engine with an extra-long shaft (25 inches) to suit higher transoms or optimize prop depth in rougher waters?

The Yamaha LF115XB 115 HP Four-Stroke Outboard Motor is precisely engineered for these advanced boating applications.

Indeed, the LF115XB is a specialized counterpart to the standard F115XB. It delivers the same robust power and efficiency. However, its key distinction lies in its left-hand (counter-clockwise) propeller rotation. This is essential for twin-engine setups. It helps eliminate prop torque, improving steering linearity and overall boat control.

Furthermore, this model features an extra-long 25-inch shaft, ensuring optimal propeller depth for various hull types, especially those with higher transoms. It includes a smooth electric start system, providing effortless and dependable ignition. In addition, it boasts Power Trim & Tilt, allowing for quick adjustments to optimize performance and navigate varying water depths.

Moreover, the LF115XB is configured for remote mechanical control, ensuring precise command from the helm. Crucially, it integrates advanced Electronic Fuel Injection (EFI) for efficient operation and includes Variable Trolling RPM Control (VTS) for anglers. Ultimately, the LF115XB delivers powerful, quiet, and exceptionally responsive performance, making it a premier choice for twin-engine installations demanding counter-rotation

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Deciphering the LF115XB Model Code

The “LF115XB” designation provides crucial information about this Yamaha outboard.

The “L” for Left-Hand Rotation

First, the “L” is the defining characteristic of this model. It signifies Left-Hand (Counter-Rotation). This means the propeller rotates counter-clockwise. This is vital for twin-engine installations. When paired with a standard rotation (right-hand) engine, it helps neutralize steering torque, improving tracking, reducing steering effort, and enhancing overall boat stability and maneuverability.

The “F” for Four-Stroke Engine

Next, the “F” indicates a Four-Stroke engine. This means the engine runs on a cleaner, more fuel-efficient four-stroke cycle. This contrasts with two-stroke engines.

The “115” for Horsepower

Then, the “115” simply denotes the 115 horsepower rating at the prop shaft.

The “X” for Extra-Long Shaft

Furthermore, the “X” signifies an Extra-Long Shaft (25 inches, or approximately 643 mm). This shaft length is crucial for boats with higher transoms. It ensures the propeller is adequately submerged for optimal thrust and performance, particularly in choppier conditions.

The “B” for Mechanical Remote Control

Finally, the “B” in LF115XB indicates that the engine is configured for Remote Mechanical Control. This means it operates from a helm station. It uses traditional mechanical throttle and shift cables.

Therefore, the LF115XB is a left-hand (counter-rotating) four-stroke, 115 horsepower outboard with a 25-inch extra-long shaft, designed for remote mechanical control. It is specifically intended for twin-engine applications.

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Why the Yamaha LF115XB Excels: Key Advantages

The Yamaha LF115XB stands out for boaters who prioritize balanced power delivery, efficiency, and advanced features in a lightweight package, specifically for multi-engine setups.

Balanced Power with Counter-Rotation

The primary advantage of the LF115XB is its counter-rotating propeller. When used in conjunction with a standard (right-hand) rotation engine, it neutralizes propeller torque steer. Consequently, this provides superior straight-line tracking. It also makes for more comfortable steering, especially at high speeds or in strong crosscurrents.

Powerful 1.8L DOHC Engine

Primarily, the LF115XB is powered by a robust 1.8-liter (1832cc) in-line four-cylinder, 16-valve, DOHC (Double Overhead Camshaft) four-stroke engine. This advanced design provides superior volumetric efficiency. It ensures strong low-end torque and impressive acceleration across the RPM range. The DOHC setup, with four valves per cylinder, allows for excellent breathing. This translates directly into better combustion and overall performance.

Incredibly Lightweight Design

Despite its power and features, the LF115XB is remarkably lightweight. It weighs approximately 177 kg (386 lbs). This makes it one of the lightest 115 HP four-stroke outboards with an extra-long shaft. As a result, it enhances boat performance, allows for faster planing, and improves handling. This is especially beneficial for vessels that can be sensitive to transom weight.

Electronic Fuel Injection (EFI) for Precision

A core feature is its Multi-Point Electronic Fuel Injection (EFI) system. This precise system, controlled by an Engine Control Module (ECM), accurately meters fuel. Consequently, you get dependable “first-time, every-time” starts, both hot and cold. Moreover, it ensures superior fuel efficiency, smoother acceleration, and excellent throttle response across the entire RPM range.

Effortless Electric Start and Power Trim & Tilt

The electric start system offers unmatched convenience. Simply turn a key, and the engine comes to life. This eliminates manual pull-starting. Additionally, the Power Trim & Tilt system allows for instant, push-button adjustments of the engine angle. This optimizes boat performance, helps navigate shallow water, and simplifies trailering. A built-in tilt stop lever also helps prevent accidental damage.

Precise Remote Control with Digital Compatibility

The LF115XB is designed for remote mechanical control from a helm station. This setup provides precise and comfortable control over steering, throttle, and gear shifting. Thus, it’s ideal for boats with steering consoles. Furthermore, it’s compatible with Yamaha’s optional Digital Network Gauges (e.g., Command Link®). These gauges provide real-time engine data, fuel management, and NMEA2000 compatibility, enhancing control and efficiency.

Smooth, Quiet, and Fuel-Efficient Operation

The LF115XB’s 1.8-liter four-cylinder DOHC engine ensures remarkably quiet, smooth, and fuel-efficient operation. It also produces ultra-low emissions. This unit holds a CARB 3-Star Rating, signifying its environmentally responsible performance. In addition, features like its offset crankshaft, single bore throttle body, improved engine rigidity, and Labyrinth Exhaust System contribute to minimal noise and vibration.

High-Output Alternator

Significantly, the LF115XB features a powerful 35-amp alternator output (12V). This provides ample power for all your onboard electronics. It also reliably charges your battery. Even at idle, the alternator produces strong, stable output (up to 27 amps at 1000 RPM).

Legendary Yamaha Durability

Like all Yamaha outboards, the LF115XB is built for durability. It features robust materials and superior corrosion protection. This includes Yamaha’s proprietary YDC-30 aluminum alloy. It also has a 5-stage Phaze Five™ anti-corrosive paint system, multiple sacrificial anodes, and high-quality stainless steel components. All these elements ensure longevity in harsh marine environments. Moreover, a freshwater flushing system allows for easy rinsing, further extending engine life.

Variable Trolling RPM Control (VTS®)

The LF115XB also offers Variable Trolling RPM Control (VTS®). This feature lets you precisely adjust trolling speeds in 50-RPM increments (from 550 to 1000 RPM). This is done via an optional Digital Network Tachometer or a remote VTS switch. This is invaluable for anglers who need to fine-tune lure presentation.

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Core Features of Your Yamaha LF115XB 115 HP Four-Stroke Outboard

Here’s a concise breakdown of the key features that define the Yamaha LF115XB:

Engine & Performance

• 115 Horsepower (Prop Shaft): Strong power for performance.
• 1.8L Four-Cylinder DOHC Engine: Advanced design for robust torque and efficiency.
• Electronic Fuel Injection (EFI): Reliable starts, fuel efficiency, and responsive power.
• Variable Trolling RPM Control (VTS®): Precision trolling from 550-1000 RPM.
• Prime Start™ System: Guarantees instant cold starts.
• Offset Crankshaft: Reduces internal friction for enhanced efficiency.

Starting & Control

• Electric Start: Effortless engine ignition.
• Remote Mechanical Control: Precise helm control of steering, throttle, and shifting.
• Power Trim & Tilt: Easy adjustment for optimal boat performance and shallow water navigation.

Design & Charging

• Counter-Rotation (Left-Hand): Essential for balanced steering in twin-engine setups.
• 25-inch (Extra-Long) Shaft: Ideal for boats with higher transoms or deep-V hulls.
• Lightweight (Approx. 177 kg / 386 lbs): Enhances boat handling and fuel efficiency.
• High-Output 35-Amp Alternator: Provides ample power for electronics and battery charging.

Durability & Environment

• Legendary Yamaha Reliability: Built for long-term durability in marine environments.
• Advanced Corrosion Protection: Multi-layer paint, alloys, and anodes resist saltwater.
• CARB 3-Star Rating: Ensures ultra-low emissions.
• Watertight Cowling: Protects internal components from water intrusion.

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Ideal Applications for Your Yamaha LF115XB Outboard

The Yamaha LF115XB is specifically designed for multi-engine boats and those requiring an extra-long, counter-rotating shaft.

Twin-Engine Center Consoles

This outboard is a perfect match for smaller to mid-sized center consoles that run twin engines. The counter-rotation provides balanced steering, crucial for comfortable and efficient offshore cruising and fishing.

Dual-Engine Bay Boats

Similarly, for larger bay boats and multi-species boats set up with dual engines, the LF115XB offers enhanced control and performance, especially in choppy waters.

Pontoon and Catamaran Applications

For certain pontoon boats or catamarans that benefit from the stability and maneuverability of twin, counter-rotating engines, the LF115XB is an excellent choice.

Coastal and Great Lakes Fishing

Anglers targeting coastal areas or larger lakes where conditions can be rougher will benefit from the extra-long shaft’s ability to maintain prop submersion and the counter-rotation’s improved handling.

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Yamaha’s Unwavering Commitment to Quality

Choosing a Yamaha LF115XB means more than just buying an outboard motor. You are investing in a meticulously engineered piece of marine equipment. It’s designed for impressive power, class-leading light weight, effortless electric start, and precise remote control. Furthermore, it offers long-term reliability and specialized performance for multi-engine setups.

Yamaha’s decades of innovation and craftsmanship are evident in every aspect of the LF115XB. This ranges from its smooth, quiet four-cylinder operation to its outstanding fuel economy and renowned durability. Ultimately, the LF115XB embodies Yamaha’s promise. It delivers a superior boating experience. It ensures peace of mind and countless hours of high-performance enjoyment on the water.

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Technical Specifications (Approximate – Always Verify with Official Yamaha Resources for the specific model year)

• Model Name: LF115XB
• Engine Type: 4-Stroke, DOHC, In-line 4-Cylinder, 16-Valve
• Horsepower (Prop Shaft): 115 HP @ 5500 RPM
• Displacement: 1832 cc (1.8L / 111.8 ci)
• Bore x Stroke: 81.0 mm x 88.9 mm (3.19 x 3.50 in.)
• Full Throttle RPM Range: 5300 – 6300 RPM
• Fuel Induction System: Electronic Fuel Injection (EFI)
• Starting System: Electric with Prime Start™
• Ignition System: TCI Microcomputer
• Alternator Output: 35 Amps (12V) with Rectifier Regulator (27A at 1000 RPM)
• Lubrication System: Wet Sump (pressurized oil delivery system)
• Engine Oil Capacity: 3.2 L (3.0L without filter, 3.2L with filter)
• Gear Ratio: 2.15:1 (28:13)
• Gear Shift: F-N-R (Forward, Neutral, Reverse)
• Shaft Length: 25 inches (Extra-Long Shaft) – approx. 643 mm (25.3 in) transom length
• Trim & Tilt System: Power Trim & Tilt
• Recommended Fuel: Regular Unleaded (Minimum Pump Octane 87)
• Recommended Fuel Filtration: Yamaha 10-Micron Fuel/Water Separating Filter (external, recommended)
• C.A.R.B. Rating: 3-Star (Ultra Low Emission)
• Exhaust: Through Propeller
• Weight (Dry): Approximately 177 kg (386 lbs)
• Steering: Remote Mechanical Control (35° from center, either direction)
• Propeller Rotation: Left-Hand (Counter-Rotating)
• Standard Features: Electric Start, Power Trim & Tilt, EFI, Freshwater Flushing System, Variable Trolling RPM Switch (VTS®) compatibility, Robust Corrosion Protection (YDC-30 alloy, 5-stage paint process, extra-large anodes), Offset Crankshaft, Watertight Cowling with Intake Air Drain System, Compatible with Yamaha Command Link® Digital Gauges (optional), NMEA2000 compatibility.
• Typical Color: Yamaha Gray

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Are you ready to optimize your multi-engine setup with a powerful, efficient, and technologically advanced 115 HP outboard with counter-rotation and an extra-long shaft? This model offers electric start, Power Trim & Tilt, and precise remote control. Invest in the Yamaha LF115XB 115 HP Four-Stroke Outboard Motor today. Experience balanced handling and superior performance. Enjoy the peace of mind that comes with Yamaha’s trusted quality. Ultimately, elevate your boating experience to the next level.