Mercury FourStroke 80–115HP Outboard Motors

Powerful 2.1L Performance for Fishing, Cruising & Adventure

The Mercury FourStroke 80–115HP range combines impressive torque, smooth acceleration, fuel-efficient performance and proven Mercury reliability.

Built around Mercury's high-displacement 2.1L inline four-cylinder FourStroke platform, these outboards deliver strong performance without unnecessary weight – making them an excellent match for aluminium boats, fishing boats, pontoons, centre consoles and recreational craft.

Choose the horsepower and configuration that best suits your boat, with Command Thrust (CT) options available on selected 90HP and 115HP models for heavier boats and applications requiring additional thrust.

Key Features

• Mercury 2.1L FourStroke engine

• Inline four-cylinder configuration

• Electronic Fuel Injection (EFI)

• Strong low-end torque and acceleration

• Smooth and quiet operation

• High-output 35-amp alternator

• SmartCraft compatible

• Command Thrust available on selected 90HP and 115HP models

• Advanced corrosion protection

• Freshwater flush system

• Power Trim

• Excellent power-to-weight performance

• Easy-access maintenance points

• Advanced tiller option available on selected models

What’s Included with the Motor

Your Mercury outboard motor is supplied with the essential rigging components required for a professional installation:

• Mercury Control Box

• Ignition Harness

• Control Cables

• Aluminium Propeller

• Rigging Hose

Please note that final rigging requirements may vary depending on the boat, installation and selected motor configuration. Additional components required for a specific installation may be quoted separately.

High-Displacement 2.1L Power

At the heart of the Mercury 80–115HP FourStroke range is a responsive 2.1-litre inline four-cylinder powerhead.

The combination of high displacement and Mercury's lightweight engine design produces excellent torque and immediate power, helping your boat get onto the plane quickly while providing strong mid-range acceleration.

This makes the range particularly well suited to aluminium boats carrying passengers, fishing equipment, fuel and other gear.

Electronic Fuel Injection

Mercury Electronic Fuel Injection (EFI) delivers dependable starting, responsive throttle performance and efficient fuel delivery.

From starting the engine to accelerating onto the plane, EFI automatically manages fuel delivery to provide smooth, consistent performance in changing conditions.

Command Thrust – Available on 90HP & 115HP

For heavier boats and applications requiring additional thrust, Command Thrust (CT) is available on selected Mercury 90HP and 115HP models.

The Command Thrust gearcase is designed to turn larger-diameter propellers, providing additional grip in the water.

This helps heavier boats get onto the plane more easily and allows them to remain on the plane at lower speeds without sacrificing top-end performance.

Command Thrust is an excellent choice for:

• Larger aluminium boats

• Pontoons

• Heavily loaded fishing boats

• Utility boats

• Work boats

• Applications requiring stronger low-speed control

High-Output 35-Amp Alternator

Modern fishing boats can carry a significant amount of electrical equipment.

The Mercury 80–115HP FourStroke range features a powerful 35-amp alternator to help keep your batteries charged and your onboard electronics operating throughout the day.

Ideal for boats equipped with:

• Fish finders

• Chartplotters and GPS

• Marine electronics

• Pumps

• Navigation equipment

• Lighting and accessories

SmartCraft Compatible

Connect your Mercury FourStroke to compatible Mercury SmartCraft instruments and displays for access to important engine and performance information.

Depending on your installation, SmartCraft can provide information including engine RPM, fuel consumption, trim and other engine operating data.

This gives you a clearer picture of how your engine and boat are performing while you're on the water.

Smooth & Quiet FourStroke Performance

Mercury has engineered the 75–115HP FourStroke platform to minimise noise and vibration.

A balanced powerhead, refined engine mounts and advanced cowl design contribute to smooth, quiet operation whether you're manoeuvring at low speed, cruising or running at higher RPM.

For anglers, that means a more comfortable day on the water. For families, it means easier conversation and a more enjoyable boating experience.

Built for Tough Marine Conditions

Mercury FourStroke outboards are designed to handle demanding freshwater and saltwater environments.

Advanced alloys, durable protective coatings, sealed electronics and Mercury's corrosion-prevention technology help protect critical components.

An easy-to-use freshwater flush system also makes it simple to flush the engine cooling system after use.

Easy Maintenance

Convenient service points make routine maintenance straightforward, helping reduce downtime and keep your Mercury performing at its best.

Mercury FourStroke engines are designed around dependable everyday ownership – so you can spend more time boating and less time worrying about your motor.

Choose Your Mercury FourStroke

Select your preferred horsepower and configuration from the available variants above.

80HP FourStroke

Smooth and efficient 2.1L four-cylinder performance for medium-sized aluminium boats, fishing boats and recreational applications.

90HP FourStroke

An excellent all-round option offering strong torque and acceleration for fishing, cruising and recreational boating. Command Thrust configurations are available for applications requiring additional thrust.

100HP FourStroke

A powerful step up for boats requiring additional performance while retaining the smoothness, efficiency and reliability of Mercury's 2.1L FourStroke platform.

115HP FourStroke

Powerful 2.1L performance for larger aluminium boats and more demanding applications. The 115HP combines excellent acceleration with a lightweight design and impressive overall performance.

115HP Command Thrust (CT)

Designed for heavier boats and load-carrying applications, the 115HP Command Thrust configuration turns larger propellers for increased thrust, excellent planing performance and improved low-speed control.

Mercury 115HP FourStroke vs 115HP Pro XS

The Mercury 115HP FourStroke is an excellent choice for fishing, cruising and general recreational boating where smooth, quiet and efficient performance is the priority.

The Mercury 115HP Pro XS is the performance-focused alternative, designed for boaters looking for sharper acceleration and a more performance-oriented setup.

Ideal for Aluminium Boats

The Mercury 80–115HP FourStroke range is particularly well suited to aluminium boats thanks to its combination of high displacement, strong torque and relatively lightweight construction.

Whether you're building a fishing boat, family cruiser, pontoon or utility boat, there's a Mercury FourStroke configuration to match your application.

Why Choose Mercury FourStroke?

Mercury's 80–115HP FourStroke range provides an excellent combination of:

• Strong 2.1L four-cylinder performance

• Excellent acceleration

• Fuel-efficient EFI technology

• Quiet and smooth operation

• High-output charging capacity

• SmartCraft compatibility

• Command Thrust options

• Proven Mercury durability

Whether you're fishing, cruising, exploring or working on the water, Mercury FourStroke delivers dependable power for the journey.