How Much Horsepower Does a Mercury 115 XS Pro Have?

The Mercury 115 XS Pro outboard engine is a powerhouse in it’s own right, boasting an impressive amount of horsepower that’s enough to propel you to extraordinary speeds on the water. With it’s sleek design and superior performance, this high-output engine is capable of taking you almost anywhere you desire with ease. What sets it apart from it’s competitors isn’t only it’s impressive speed but also it’s lightweight construction, weighing nearly 20 pounds lighter than it’s closest rival. This means you can enjoy exceptional power and agility without sacrificing on efficiency or maneuverability. Whether you're an avid angler seeking to explore new fishing grounds or simply a thrill-seeker looking for an adrenaline-pumping adventure, the Mercury 115 XS Pro is equipped to deliver an exhilarating experience on the water. With it’s remarkable horsepower and cutting-edge features, this FourStroke outboard is undoubtedly a force to be reckoned with.

What Is the Difference Between Mercury 115 and 115 Pro?

The Mercury 115 and 115 Pro are both powerful engines designed to deliver exceptional performance on the water. However, there are some notable differences between these two models that set them apart. One of the main differences lies in their top speed capabilities. The 115 Pro XS FourStroke is known for it’s impressive speed, as it can reach up to 3 mph faster than it’s closest competitor and over 1 mph faster than the standard 115 FourStroke by Mercury.

This engine is designed to operate at higher revolutions per minute, allowing for improved performance even with an already powerful engine. This means that boaters can expect faster acceleration and a thrilling ride on the water.

It’s built with advanced technology and features that optimize fuel consumption, allowing boaters to enjoy longer trips without frequent refueling. This not only saves time but also adds convenience to the overall boating experience.

Whether you prioritize speed, efficiency, or customization, both engines offer impressive capabilities that will enhance your boating experience.

The shift from traditional 2-stroke engines to more environmentally friendly 4-stroke engines has been a significant development in the marine industry. In this transition, the renowned Mercury Pro XS series takes center stage, replacing the discontinued OptiMax 2-stroke engines. Boasting exceptional low-end torque and lightweight construction, the Pro XS is purpose-built to cater to the requirements of avid bass boat, multi-specie, and saltwater inshore anglers.

Is a 2016 Mercury Pro XS a 2 Stroke or 4 Stroke?

The 2016 Mercury Pro XS is a 2-stroke outboard engine. However, the new Pro XS models now utilize advanced technology that enhances fuel efficiency and reduces emissions, making them more environmentally friendly than traditional 2-stroke engines. With the discontinuation of the OptiMax series, the Pro XS is now the go-to choice for anglers looking for a powerful and efficient outboard motor.

The Pro XS is known for it’s exceptional low-end torque, allowing for quick acceleration and excellent hole-shot performance. This is especially beneficial for bass boat and multi-specie anglers who need to get on plane quickly to reach their fishing spots. Additionally, the Pro XS is designed to be lightweight, further enhancing it’s performance and maneuverability on the water.

Not only is the Pro XS suitable for freshwater fishing applications, but it’s also designed to meet the demands of saltwater inshore anglers. It’s durable construction and robust components make it capable of withstanding the harsh conditions and corrosive elements often encountered in saltwater environments. This ensures that anglers can rely on the Pro XS to perform consistently and reliably, no matter the fishing conditions.

Intelligent Speed Control allows for precise throttle control and improved idle speed stability, while the Digital Throttle & Shift system ensures smooth and seamless shifting. In addition, the Pro XS incorporates Mercurys SmartCraft technology, providing anglers with valuable engine data and diagnostics in real-time.

It’s 2-stroke design, coupled with advanced technology, allows for excellent low-end torque and improved fuel efficiency, making it an excellent choice for any angler looking for a powerful and efficient outboard motor.

Comparison of 2-Stroke and 4-Stroke Outboard Engines

A comparison of 2-stroke and 4-stroke outboard engines examines the differences between two types of motors commonly used in boats. The 2-stroke engine relies on a simpler design and commonly uses a mixture of fuel and oil for lubrication. On the other hand, the 4-stroke engine operates with separate systems for fuel and oil, which allows for more precise lubrication and potentially reduces emissions. It’s important to note that the choice between these engines often depends on individual preferences and specific requirements, including factors such as boat performance, fuel efficiency, and environmental impact.

In addition to the updated RPM range and gearcase ratio, another notable distinction between the Mercury FourStroke and the Mercury 150 Pro XS lies in their aesthetics. While the FourStroke sports the classic black and red gearcase paint, the Pro XS showcases striking grey and silver graphics, giving it a more sleek and contemporary look. These minor yet significant differences set the two models apart, catering to specific preferences and requirements of boaters.

What Is the Difference Between a Mercury 4 Stroke and a Pro XS?

Another notable difference is the performance aspect. The Mercury FourStroke models focus on smooth and quiet operation, making them ideal for recreational boating and fishing. On the other hand, the Mercury 150 Pro XS is designed for high-performance applications, with a focus on speed and acceleration. It’s often the preferred choice for professional anglers and competitive boat racing.

Another important distinction lies in the intended use.

Comparison of Fuel Efficiency Between Mercury 4 Stroke and Pro XS Engines

  • Mercury 4 Stroke engine fuel efficiency
  • Pro XS engine fuel efficiency

Mercury Pro XS engines are known for their exceptional cleanliness and adherence to stringent air-quality regulations. These powerful engines incorporate advanced fuel-injection technology, ensuring optimal fuel and air atomization for efficient combustion. Additionally, specialized pistons are designed to enhance fuel combustion, resulting in improved overall performance.

What Is Special About Mercury Pro XS?

Mercury Pro XS engines are renowned for their exceptional performance and reliability. What sets them apart is their emphasis on environmental sustainability. These engines are engineered to be among the cleanest on the water, adhering to the strictest international air-quality standards.

These pistons are designed to enhance fuel combustion efficiency, allowing for maximum power output while consuming lesser fuel. This improved efficiency not only translates into a more exhilarating boating experience, but it also contributes to reduced fuel consumption and lower emissions.

They undergo rigorous testing and quality control processes to ensure that they can withstand the most demanding conditions. These engines are built to last, providing boaters with the peace of mind that their investment will deliver exceptional performance for years to come.

They’re available in a range of horsepower options, allowing boaters to choose an engine that best suits their needs.

These engines are designed to meet stringent air-quality standards, with advanced fuel injection systems and specialized pistons that optimize combustion and reduce emissions.

The Advanced Fuel Injection Systems in Mercury Pro XS Engines and How They Contribute to Improved Performance and Reduced Emissions

  • Direct fuel injection system
  • High-pressure fuel pumps
  • Precision fuel injectors
  • Advanced engine control module
  • Electronic fuel management system
  • Optimized fuel atomization
  • Improved fuel efficiency
  • Enhanced combustion process
  • Reduced emissions
  • Increased power output
  • Quicker throttle response

The performance of boats equipped with the powerful 115 hp Mercury outboard engine was thoroughly examined, revealing impressive results. These vessels reached a maximum speed of 24 mph, with the exception of the smallest and lightest boat which achieved a slightly higher speed. When it came to efficiency, cruising at mid teens proved to be the sweet spot, delivering fuel consumption rates ranging from 4.5 to 4.9 mpg. Now, let’s delve into more details about the performance and capabilities of the Mercury 115 outboard.

How Fast Will a 115 Hp Mercury Outboard Go?

The speed of a boat with a 115 hp Mercury outboard engine can vary depending on several factors, including the weight and size of the boat, as well as external conditions such as wind and water currents. However, based on our studies, we found that most boats powered by a Mercury 115 outboard engine had a wide open throttle (WOT) speed of around 24 mph.

It’s important to note that the smallest and lightest boat in our study achieved a slightly higher speed of 25 mph at WOT. This can be attributed to it’s lighter weight, allowing for slightly better acceleration and top speed.

When it comes to cruising speeds, we observed that the most efficient range for the boats equipped with a Mercury 115 outboard engine was in the mid teens mph. At these speeds, the boats achieved a fuel economy ranging from 4.5 to 4.9 miles per gallon (mpg). This indicates a good balance between speed and fuel efficiency, allowing for extended cruising without excessive fuel consumption.

Additionally, external conditions such as wind speed and direction, as well as water currents, can influence the overall performance and speed of the boat.

To fully optimize the performance of a boat and it’s Mercury 115 outboard engine, it’s recommended to consult the manufacturers guidelines and follow proper maintenance procedures. Regularly servicing the engine, ensuring propeller and hull cleanliness, and fine-tuning the boats trim can all contribute to achieving the desired speed and fuel efficiency.

Source: Mercury 115 EFI – BoatTEST

The top RPM of a Mercury 115 4 stroke varies depending on the model year. From 2001 to 2006, the wide open throttle RPM range is between 5000 and 6000. From 2007 to 2014, it ranges from 5800 to 6400. For the 2015 and newer models, the range is between 5000 and 6000 RPM.

What Is the Top RPM of a Mercury 115 4 Stroke?

The top RPM of a Mercury 115 4-stroke varies depending on the model year. For the 2001-2006 models, the wide open throttle (WOT) RPM range is between 5000 and 6000. The 2007-2014 models have a slightly higher WOT RPM range of 5800-6400. The more recent 2015 and onwards models return to a WOT RPM range of 5000-6000.

Mercury outboard engines are known for their precision engineering and performance capabilities. With a 115 horsepower output, the 4-stroke engine delivers reliable power for a variety of boating applications. Whether youre cruising on a pontoon boat or fishing in a bass boat, the Mercury 115 4-stroke ensures smooth and efficient operation.

The WOT RPM range chart provided gives boat owners an idea of the engines performance at full throttle. It’s important to note that these ranges are approximate and can vary depending on factors such as boat loading, propeller selection, and environmental conditions. Understanding and adhering to the recommended RPM range can optimize the engines performance and extend it’s lifespan.

The 115 4-stroke models are no exception. These engines utilize advanced technology and materials to provide a smooth and quiet ride, while also maintaining high levels of durability and reliability.

Mercurys commitment to innovation is evident in their engines, and the 115 4-stroke is no different. With features such as electronic fuel injection, advanced engine management, and an integrated oiling system, these engines offer improved fuel efficiency, reduced emissions, and greater ease of use.

By adhering to the recommended WOT RPM range and properly maintaining your engine, you can enjoy years of reliable and efficient operation on the water.

Tips for Maintaining the Mercury 115 4-Stroke Engine

  • Regularly check and change the engine oil according to the manufacturer’s recommendations.
  • Inspect and clean the fuel filters to prevent clogging.
  • Keep the propeller clean and free from any debris.
  • Monitor the cooling system to ensure proper circulation and prevent overheating.
  • Check the spark plugs and replace them if worn or damaged.
  • Inspect the battery and connections for any signs of corrosion or damage.
  • Flush the engine with freshwater after each use to remove any salt or grime buildup.
  • Regularly inspect and tighten all bolts and fasteners to ensure they’re secure.
  • Follow the recommended maintenance schedule provided by the manufacturer.
  • Store the engine in a dry and protected area when not in use.


With it’s lightweight construction and remarkable speed, this 150hp FourStroke outboard engine surpasses it’s competitors, providing an exhilarating experience on the water. It’s built-in durability and reliability ensure that it can take you to virtually any destination, making it a trusted companion for those seeking adventure and high-performance capabilities.

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