Spinning in circles to turn around can make anyone dizzy. That's why Mercury's 2.5 and 3.5 hp FourStrokes offer 360° steering and a twist grip throttle. The tiller handle can be turned over and the engine rotated to reverse the thrust.
Mercury's 2.5 to 3.5hp portable outboards are designed from the start to be compact, lightweight and easier to carry. By utilizing Mercury's patented one-piece integrated cylinderblock design, we've eliminated gaskets and fasteners and made the powerhead much more compact and lightweight.
Your steering hand will thank you. On average, Mercury's 3.5hp fourstroke has 32% less tiller handle vibration than competitive outboards.
Mercury's twist-throttle tiller handle is longer for better control, plus it folds for easy, compact storage.
A standard automatic cylinder decompression system greatly reduces pull force for effortless starting - so any member of the family can easily get the engine going.
At only 55 pounds, the 6hp model is the lightest engine in its class. The compact, lightweight design makes it truly an outboard on the go.
No other 6hp fourstroke on the market offers through-hub exhaust, for quiet and pleasant operation.
Mercury Fourstrokes are designed with a boat load of user-friendly features, such as our multifunction tiller handle. This tiller handle gives you easy one-handed operation of shifting, stopping, throttle, throttle friction, and tilt. More control equals better maneuverability.
The 8 and 9.9hp models come standard with both ratcheting trim and tilt lock. The ratcheting trim allows you to easily trim the motor up to the height you need. When you?re ready to tilt the engine down, the tilt lock will keep it at your selected angle.
The lightest engine in its class, the 8 and 9.9hp outboards come in at a scant 83 pounds. These outboards are a perfect fit for a wide range of small boat applications.
At 21.4 cubic inches, this engine delivers the strong low-end torque needed to get the hull up on plane, with quicker throttle response and acceleration.
Mercury FourStrokes are designed with a boat load of user-friendly features, such as our multifunction tiller handle. This tiller handle gives you easy one-handed operation of shifting, stopping, throttle, throttle friction, and tilt. More control equals better maneuverability.
Mercury's wishbone style motor mount system cradles the powerhead and absorbs the torsional rotation of the crankshaft. By isolating and reducing the vibration transmission to your boat, it provides a smooth driving experience.
Mercury's 15hp FourStrokes have dual water pickups. So even if you end up in the shallows, your engine will keep its cool and not overheat.
At 21.4 cubic inches, this engine delivers the strong low-end torque needed to get the hull up on plane, with quicker throttle response and acceleration.
Mercury Fourstrokes are designed with a boat load of user-friendly features, such as our multifunction tiller handle. This tiller handle gives you easy one-handed operation of shifting, stopping, throttle, throttle friction, and tilt. More control equals better maneuverability.
Mercury's wishbone style motor mount system cradles the powerhead and absorbs the torsional rotation of the crankshaft. By isolating and reducing the vibration transmission to your boat, it provides a smooth driving experience.
Mercury's 20hp FourStrokes have dual water pickups. So even if you end up in the shallows, your engine will keep its cool and not overheat.
Mercury FourStroke EFI outboards deliver consistent, easy starts, smooth operation, and reliability. The 25 and 30hp models are the industry's first batteryless EFI outboards.
All portable and mid-range Mercury FourStrokes feature inline designs for inherently smooth operation.
Every 25 and 30hp Mercury Fourstroke utilize a three-cylinder engine design that delivers better inherent balance than the twin cylinder designs used by competitive outboards. Mercury's three cylinder approach results in a smoother and quieter user experience.
Mercury Fourstrokes are designed with a boat load of user-friendly features, such as our multifunction tiller handle. Available on gas assist or power trim models, this tiller handle gives you easy one-handed operation of shifting, stopping, throttle, tilt and starting. More control equals better maneuverability.

The 40-60hp Mercury engines are Electronically Fuel-Injected, which provides turn-key starting, increased power, improved fuel economy, and spectacular reliability.
Engine Guardian uses key external sensors to monitor all the major functions of your engine. If the proactive operator-warning system detects a potential problem - such as over-revving, overheating, or low oil pressure - Engine Guardian sends out an alert and automatically reduces engine power enough to prevent damage, but still allows you to get to shore.
Mercury FourStrokes deliver powerful saltwater protection by using stainless steel components, hard anodizing, engineered polymers, and an exclusive multistep painting and coating process. Saltwater maintenance is made easy in the 40-60hp models with the innovative freshwater flush. And only Mercury offers a three-year limited corrosion failure warranty.
Large-displacement dual overhead cam increases low-end power. Mercury FourStrokes consistently outperform the competition in 0-30 mph acceleration.
The precision engineered shift system in every 40-60hp FourStroke delivers smooth, positive shifting for an improved driving experience.
Every 40-60hp SmartCraft-equipped FourStroke features Troll Control, which allows you to set your engine speed as low as 700 rpm for trolling or running through extended no-wake zones.
All Mercury FourStroke engines are designed to run clean, helping to protect the environment for generations to come. Every Mercury mid-range FourStroke engine carries a CARB Three-star Ultra-low Emissions rating.
Introducing the new ECO-Screen feature of the SmartCraft MercMonitor. The ECO-Screen constantly monitors engine RPM, speed, fuel consumption and engine trim to automatically calculate and guide you to your maximize fuel efficiency. This user-friendly feature utilizes yellow and green display colors to signify when you're operating at your optimal efficiency. This can result in a 10-20% increase in fuel economy.
Every 75-115 horsepower Mercury FourStroke is built to deliver long-term reliable performance. Our fully filtered air intake protects internal engine components from potentially damaging dust and sand, while our advanced antidrainback oil system assures instant lubrication on start-up. In addition, the use of shared Verado components ensures the ultimate in mechanical toughness and reliability.
The 75-115hp FourStroke models feature the same valve train architecture as Verado - a robust design that is incredibly durable and maintenance-free for life.
Mercury FourStrokes deliver powerful saltwater protection by using stainless steel components, hard anodizing, engineered polymers, and an exclusive multistep painting and coating process. Saltwater maintenance is made easy in the 75-115hp models with the innovative freshwater flush. And only Mercury offers a three-year limited corrosion failure warranty.
Large-displacement dual overhead cam increases low-end power. Mercury FourStrokes consistently outperform the competition in 0-30 mph acceleration.
Every Mercury 75-115hp FourStroke outboard features a 50-amp, 630-watt alternator, the most powerful in its class. This impressive alternator can power all your accessories - electronics, lights, livewells and audio equipment - throughout your trip.
Every 75-115 horsepower SmartCraft-equipped FourStroke features Troll Control, which allows you to set your engine speed as low as 650 rpm for trolling or running through extended no-wake zones.
Mercury FourStroke engines feature Electronic Fuel Injection for better fuel economy along with easier, turn-key starting.
Introducing the new ECO-Screen feature of the SmartCraft MercMonitor. The ECO-Screen constantly monitors engine RPM, speed, fuel consumption and engine trim to automatically calculate and guide you to your maximize fuel efficiency. This user-friendly feature utilizes yellow and green display colors to signify when you're operating at your optimal efficiency. This can result in a 10-20% increase in fuel economy.
Every 75-115hp Mercury FourStroke, features an easy access automotive spin-on-type oil filter, oil fill and side mounted oil drain which makes for easy service and maintenance. You should spend more time on the water than servicing your outboard.
The innovative OptiMax DI system delivers the ultimate in efficiency, squeezing more miles and performance from every drop of fuel. The exclusive deflector-shaped pistons and combustion chambers enhance fuel economy and lower emissions by efficiently directing the fuel/air charge to the spark plug. The OptiMax Air Compressor provides a steady charge of cooled air for maximum combustion efficiency.
OptiMax's durable gearcase features a heavy-duty prop shaft and Mercury-patented dual water pickups on the front end of the torpedo for a constant flow of cooling water. It is specifically designed to give you impeccable handling and incredible top speeds. Dome-Shaped Piston Heads direct the fuel-and-air charge to the spark plug more efficiently, providing outstanding durability along with excellent running quality.
OptiMax is built with more stainless steel and corrosion-resistant components, which translates to saltwater durability, longer intervals between maintenance, and lower cost of ownership. In addition, our lower-pressure direct-injection system also provides superior component durability and longevity.
The OptiMax Two-Stage Direct Injection System provides a constant supply of atomized fuel and air while the Vapor Separator Tank (VST) ensures a constant supply of liquid fuel for the injection process. The result is unmatched throttle response, instant starting, and smooth performance.
The inline 3-cylinder design is slim and lightweight making it a great choice for almost any type of boat. It consistently outperforms other DI engines in holeshot, mid-range acceleration and top-end speed.
No other marine engine company has more knowledge about hydrodynamics and gearcase design than Mercury. We have the right gearcase configuration and technology to match any boating application. Our designs result in less drag - giving you better handling and performance.
The innovative OptiMax DI system delivers the ultimate in efficiency, squeezing more miles and performance from every drop of fuel. The exclusive deflector-shaped pistons and combustion chambers enhance fuel economy and lower emissions by efficiently directing the fuel/air charge to the spark plug. The OptiMax Air Compressor provides a steady charge of cooled air for maximum combustion efficiency.
OptiMax's durable gearcase features a heavy-duty prop shaft and Mercury-patented dual water pickups on the front end of the torpedo for a constant flow of cooling water. It is specifically designed to give you impeccable handling and incredible top speeds. Dome-Shaped Piston Heads direct the fuel-and-air charge to the spark plug more efficiently, providing outstanding durability along with excellent running quality.
OptiMax is built with more stainless steel and corrosion-resistant components, which translates to saltwater durability, longer intervals between maintenance, and lower cost of ownership. In addition, our lower-pressure direct-injection system also provides superior component durability and longevity.
The OptiMax Two-Stage Direct Injection System provides a constant supply of atomized fuel and air while the Vapor Separator Tank (VST) ensures a constant supply of liquid fuel for the injection process. The result is unmatched throttle response, instant starting, and smooth performance.
The V-6 design is slim and lightweight making it a great choice for almost any type of boat. It consistently outperforms other DI engines in holeshot, mid-range acceleration and top-end speed.
No other marine engine company has more knowledge about hydrodynamics and gearcase design than Mercury. We have the right gearcase configuration and technology to match any boating application. Our designs result in less drag - giving you better handling and performance.
The innovative OptiMax DI system delivers the ultimate in efficiency, squeezing more miles and performance from every drop of fuel. The exclusive deflector-shaped pistons and combustion chambers enhance fuel economy and lower emissions by efficiently directing the fuel/air charge to the spark plug. The OptiMax Air Compressor provides a steady charge of cooled air for maximum combustion efficiency.
OptiMax?s durable gearcase features a heavy-duty prop shaft and Mercury-patented dual water pickups on the front end of the torpedo for a constant flow of cooling water. It is specifically designed to give you impeccable handling and incredible top speeds. Dome-Shaped Piston Heads direct the fuel-and-air charge to the spark plug more efficiently, providing outstanding durability along with excellent running quality.
OptiMax is built with more stainless steel and corrosion-resistant components, which translates to saltwater durability, longer intervals between maintenance, and lower cost of ownership. In addition, our lower-pressure direct-injection system also provides superior component durability and longevity.
The OptiMax Two-Stage Direct Injection System provides a constant supply of atomized fuel and air while the Vapor Separator Tank (VST) ensures a constant supply of liquid fuel for the injection process. The result is unmatched throttle response, instant starting, and smooth performance.
The V-6 design is slim and lightweight making it a great choice for almost any type of boat. It consistently outperforms other DI engines in holeshot, mid-range acceleration and top-end speed.
No other marine engine company has more knowledge about hydrodynamics and gearcase design than Mercury. We have the right gearcase configuration and technology to match any boating application. Our designs result in less drag ? giving you better handling and performance.


The OptiMax Two-Stage Direct Injection System produces consistent performance and unmatched throttle response by providing a constant supply of atomized fuel and air. The Pro XS also offers a Higher Wide-Open-Throttle RPM Operating Range, giving you more propeller options to maximize the performance of your boat. Visit the mercurymarine.com Prop Selector to choose the prop that?s right for you.
The compact 60-degree V6 block combines the smooth-running characteristics of a powerful V6 engine with a slim, lightweight design, making it a great choice for almost any type of boat. It consistently outperforms other DI engines in holeshot, mid-range acceleration and top-end speed.
The tournament-tested Mercury ProXS lineup is the choice of thousands of performance-minded anglers. Only OptiMax ProXS engines feature durable and responsive Carbon Fiber Reeds to control airflow into the engine crankcase, while dome-Shaped Piston Heads direct the fuel-and-air charge to the spark plug more efficiently. This results in amazing power, outstanding durability, and excellent running quality. In head-to-head tests, the 150hp ProXS outran the competition by almost 5 MPH ? while delivering 15% better fuel economy. In addition, we outfitted the 250hp ProXS with Solid Billet Aluminum Mounts to keep the engine from turning or twisting under high torque (20-inch models only).
OptiMax is built with more stainless steel and corrosion-resistant components, which translates to saltwater durability, longer intervals between maintenance, and lower cost of ownership. In addition, our lower-pressure direct-injection system also provides superior component durability and longevity.
The innovative OptiMax Direct Injected system delivers the ultimate in efficiency, squeezing more miles and performance from every drop of fuel. The unique shapes of the OptiMax-exclusive Dome-Shaped Pistons and combustion chambers enhance fuel economy and lower emissions by efficiently directing the fuel/air charge to the spark plug. The OptiMax Air Compressor provides a steady charge of cooled air for maximum combustion efficiency.
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