More Features, More Fun.

Mercury FourStrokes have long led the pack with clean, quiet, fuel-efficient outboard power, and now the gap grows even wider. Whether you pilot a small fishing boat or a party on a big pontoon, there’s a Mercury FourStroke that fits the bill.

The 40, 50 and 60hp models are available with either standard or BigFoot gearcases. BigFoot models are perfect for pontoons and large boats, while the standard gearcases are ideal for aluminum fishing boats, bay boats, and inflatable boats.

No matter the size, these FourStroke outboards are a pleasure to drive. Mercury engineers have created a unique design for easier shifting and refined the throttle resolution setting for smoother low-speed operation. Plus, every 40-60hp FourStroke features a single-latch cowl system for easy, quick release.


Easy Starts. Smooth Running.

The 40-60hp Mercury engines are Electronically Fuel-Injected, which provides turn-key starting, increased power, improved fuel economy, and spectacular reliability.

Peace Of Mind

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.

Superior Corrosion Protection

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.


Quicker is Better

Large-displacement dual overhead cam increases low-end power. Mercury FourStrokes consistently outperform the competition in 0-30 mph acceleration.

Easy Shifting

The precision engineered shift system in every 40-60hp FourStroke delivers smooth, positive shifting for an improved driving experience.

Slow but Steady

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.


Clean Power

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.

Gauge Your Fuel Economy

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.

HP/kW 40 / 30
Full throttle RPM 5500-6000
Cylinder Configuration I-3
Displacement (CID / CC) 45.6 / 747
Bore and Stroke (in / mm) 2.56 x 2.95in
65 x 75mm
Fuel Induction System 2 valves per cylinder, single overhead cam (SOHC)
Ignition ECM 70
Fuel System Electronic Fuel Injection (EFI)
Alternator Amp 18 amp / 226 watt
Cooling System Water-cooled with thermostat
Starting Electric (turn-key)
Gearcase Ratio 2.00:1
Gear Shift F-N-R
Steering Big Tiller Compatible
Tiller Kit
Trim System Gas assist
Power Tilt
Power Trim
Exhaust System Through prop
Shallow water trim range (degrees) 20
Recommended Oil Mercury 4-Stroke Outboard Oil
Recommended Fuel 87 octane/up to 10% ethanol
Remote fuel tank optional Yes
Engine Protection Operator Warning System Low oil pressure
Compatible with Smartcraft Digital Technology Yes
Shaft Length 15 in (381mm)
20 in (508 mm)
Dry Weight * Lightest model available 216lbs / 98kg
CARB Star Rating 3

FourStroke 40 - 60 HP Engine Tests

There are currently no engine tests for this product line.

FourStroke 40 - 60 HP Resources

Buy the Books

You can order all available Mercury literature online or through any authorized Mercury dealer. Please have your outboard or sterndrive serial number before placing the order.

  • Operation, Maintenance and Warranty Manuals
  • Parts Manual
  • Service Manual
Purchase a Manual
Request a Brochure

Request printed brochures by mail or download as an electronic PDF.

Request a Brochure

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Step Up To BigFoot

Mercury Marine’s BigFoot FourStroke outboard has earned a reputation as being the ideal pontoon boat gearcase, but it’s also a perfect choice for additional applications, especially aluminum fishing boats and saltwater flats boats that have the ability to handle the 40- to 60-hp BigFoot lineup.

The gearcase was designed specifically to deliver the power, thrust and control that wider, heavier boats demand - regardless of whether that boat is a pontoon, tritoon, deep-V aluminum or fiberglass boat. The BigFoot gearcase is the same size as a standard 115 hp FourStroke Mercury outboard. Thus, the engine is capable of turning a larger-diameter propeller and providing additional power.

Anglers operating aluminum fishing boats who have chosen a BigFoot gearcase are experiencing better hole shot with minimal loss in top-end speed. The longer, bigger components allow the BigFoot to swing a propeller 20 percent larger, which provides better control, especially at low speeds.

The taller gearcase improves performance and efficiency by placing the propeller deeper in the water below turbulence, allowing it to operate in cleaner, less aerated water. The low 2.33:1 gear ratio delivers thrust and maneuverability that big loads demand, and its oversized anti-ventilation plate prevents air from being drawn into the prop - increasing efficiency. All of these features equate to a satisfying boating experience.

Anglers fishing in shallow waters need their outboard to get on plane fast and lift higher. Typically, boats equipped with BigFoot outboards run higher in the water making for a dryer, more enjoyable ride. As an added bonus, fuel economy also improves significantly because less boat is dragging in the water.

Recently, Mercury dealerships performed head-to-head testing between the 60 hp BigFoot FourStroke outboard and a competitive 70 hp four-stroke. The 60 hp BigFoot outperformed the 70 hp in acceleration and fuel economy without any disadvantage to mid-range speed.

The BigFoot Difference (blue shaded areas represent prop and gearcase advantages)

BigFoot key attributes

Large Displacement 4-cylinder engine
A single overhead cam and long intake stroke design increase torque output for better acceleration

Electronic fuel injection
Provides turn-key reliable starting, instant throttle response, spectacular fuel economy and less fuel system maintenance

Longer design
Positions the propeller deeper in the water below turbulence, allowing it to operate in cleaner, less aerated water

Bigger propellers
Designed with 20 percent more surface area than competitive props for greater performance

Low gear ratio
The 2.33:1 ratio improves overall thrust and efficiency

Other features

Anti-ventilation plate: Oversized design prevents surface air from being drawn into the prop for increased efficiency

18 Amp alternator: Maintains battery charge to run electronics, lights and other accessories

SmartCraft: Delivers information regarding key engine functions from fuel usage, rpm and engine guardian to slow trolling rpm control and hull information

Precision shift system: Delivers smooth, quiet and effortless shifting

Power trim/tilt: Allows user to trim the unit for maximum performance, handling and shallow water operation

Freshwater flushing port: Rear-mounted port flushes saltwater and debris out of the engine, extending the life of the outboard

Easy maintenance: Convenient oil drain and fill location, along with an automotive-style spin-on filter

Tiller or remote steering: Standard remote-steer models can be fitted with a Big Tiller Kit option, making it a perfect fit for all types of boating applications

Engine Tests Fuel Care Repower Sellathon