A powerful alternator – 60 amps on the 150hp outboard and 35 amps on 75 to 115hp outboards – helps keep batteries charged and your onboard electronics running all day.
Fourstroke 75-150hp
Embrace Possibility.
Mercury FourStroke outboard motors are incredibly powerful and efficient, and they feature a wide range of applications. Crafted for less weight and high displacement, they generate abundant torque and immediate power. And because they don’t have to work as hard as heavier engines or those with lower displacement, they make boats plane faster and accelerate better, and they provide optimal fuel efficiency at cruising speed.
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Intuitive, innovative features
High-output alternator
Extra charging power
Idle charge battery-management technology on the 150hp engine automatically increases idle rpm to boost alternator output and recharge low batteries.
Command Thrust gearcase
Available for the 90 and 115hp outboards, the Command Thrust gearcase is designed to turn larger props. It helps get heavy boats on plane more easily and hold them there at lower speeds without impacting the top speed.
Tiller handle
With a range of adjustments and ergonomic controls, the available advanced tiller for 90 to 115hp models or Big Tiller for the 150hp engine puts you in complete command of your adventures.
Electronic Fuel Injection (EFI)
From the moment you crank the engine to the moment you drop the throttle, EFI technology responds with instant power. Surefire starting in all weather conditions. Smooth, efficient acceleration. Maximum capability.
Fourstroke performance data
Smooth & quiet
Optimised from the cowl to the mounts to minimise noise and vibration, Mercury fourstroke outboards are exceptionally quiet and smooth. The 75 to 115hp engines are quieter and smoother than any competing outboards on the water.
Powerful torque
High-displacement powerheads and lightweight designs combine to deliver instant acceleration and exceptional overall performance.
Lighter by design
The 115 and 150hp fourstroke outboards are the lightest in their class, enhancing fuel efficiency and speed for a wide range of boat types.
FourStroke Advantages
Corrosion Resistance
Advanced alloys. Durable coatings. Sealed electronics. Easy-to-use freshwater flush system. Fourstroke outboards come packed with premium corrosion-preventive technology that enables them to stand up to the most demanding marine environments.
Superior Control
With a choice of tiller or remote steering and compatibility with advanced SmartCraft® features such as Troll Control and Active Trim, you can optimise your engine for total command of all your adventures.
Go Farther
A host of efficiency-enhancing features such as Advanced Range Optimisation (ARO), a closed-loop fuel system and a hydrodynamic gearcase optimise fuel economy so you can go farther on every tank.
Power and Flexibility
A Mercury 250 or 300hp fourstroke outboard is the answer for fishing, cruising or all-around fun. They are ideal for powering a range of boats and come in four colour options to match your boat and style.
Engine Specifications by Horsepower
SmartCraft® The power to do more
SmartCraft® is a full suite of digital technologies, fully integrated and totally coordinated. Gauges, sensors, vessel systems, computer-controlled features – one total package, one high level of control. Make your boating experience easier, safer and a lot more enjoyable.
Time for new power?
Replacing an old outboard can deliver improved performance and reliability, increased fuel economy and better handling for a more enjoyable boating experience. The entire family of fourstroke outboards is lightweight and compact, making those engines perfect for repowering older boats.
Warranty & Maintenance
Warranty coverage
Mercury makes world-class marine products backed by world-class warranties.
Maintenance
Mercury fourstroke outboards are thoughtfully designed to minimise maintenance and ensure you get the most from your time on the water.
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Resources for you
Brochures
Take a deeper dive into what makes Mercury fourstroke outboards stand apart with detailed information on each engine and the features that make them unique.
The best products have the best dealers
When you make the best marine products in the world, you want the best dealers behind them. That is why we ensure that Mercury dealers are the best equipped to sell and service our products. Your Mercury authorised dealer is the place to see and purchase Mercury engines as well as genuine Mercury Precision Parts® and accessories. With thousands of dealers, you can rest assured we are always close by and ready to help you Go Boldly®.