FourStroke 2.5-20hp

Output far beyond its size

Put amazing power in the palm of your hand. These compact outboard motors take you to the fun, the fish, or whatever floats your boat – quickly and reliably. Enjoy quick acceleration to go with exhilarating speed. Easy to install and operate, with reliable starting, low vibration, and instant throttle response. It's worry-free boating at its best.

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Learn more about how Mercury makes great days on the water possible.

Mercury Outboard Brochure

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Intuitive, innovative features

Electronic Fuel Injection (EFI)

From the moment you crank the engine to the moment you drop the throttle, EFI technology available on 8 and 20hp outboards responds with instant power. Surefire starting in all weather conditions. Smooth, efficient acceleration. Maximum fun.

Advanced tiller

With a range of adjustments, easy-to-reach controls and the flexibility to be set up for left or right-handed operation (on select models), Mercury tiller handles put you in complete command of your adventures.

Battery-free EFI

Go farther, confidently, with battery-free EFI technology. Included with manual-start 8 and 20hp models, it lets you enjoy the flexibility of portability, without needing to bring along a cranking battery.

Easy portability

Simple to install and lightweight, 2.5 to 20hp fourstroke outboards let you bring along the fun wherever it’s needed.

Convenient Maintenance

We made maintenance easier with features like a no-spill oil change system, easy-out fuel filter and lifetime maintenance-free valve train

Fourstroke performance

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Speed and acceleration

FourStroke outboards are optimised for reliable performance and fun in all seasons. The 500cc, single-overhead cam design delivers the fastest speed and acceleration among 3-cylinder, 30hp outboards.

Lightweight & compact

Pound for pound, these outboards are big performers. They are the lightest 3-cylinder outboards in their class.

Powerful alternator

Even at low speeds, the alternator delivers powerful battery-charging output to keep onboard electronics humming. There are no belts or bearings to maintain.

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.

name

FourStroke 2.5hp

Horse power

2.5

Alternator amp / watt

Compatible with SmartCraft digital technology

Displacement (CID/CC)

5.2 / 85

Dry weight *lightest model available

41 lbs / 18 kg

Engine type

1-cyl

HP / kW

2.5 / 1.9

Integrated fuel tank

0.26 Gal / 1 L

Remote fuel tank standard (gal /L)

Starting

Manual

Trim system

4 position

Warranty & maintenance

Limited warranty

World-class marine products backed by world-class warranties. We stand behind everything we build, and we go the extra mile to make sure your Mercury experience is the best it can be – on the water and off.

Review Coverage

Mercury Product Protection

Mercury Product Protection is an extended service contract for your Mercury engine that covers certain expenses caused by defects in materials and workmanship after the Mercury limited warranty expires.

Explore the Benefits

Maintenance

Whether you keep your outboard at a remote outpost or in your garage, we have made maintenance easier. Our maintenance-free camshaft requires no regular service and no valve leash adjustments. Ever. For the life of the engine. Changing the crankcase and gearcase oil is a snap, too. The oil-filter drip tray (on EFI models) and easy-drain design minimise messes. The gear lube will fully drain from any tilt position. Less hassle leaves more time for fun.

Maintenance & How-To

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.

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Ten reasons to believe

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Mercury 2.5 to 20hp fourstroke brochure

Need to find a price on new engine?

Our new Engine Configurator offers real-time pricing on a wide range of outboard engines, from 2.5hp tillers to 400hp Verado V10s and allows you to select from multiple models effortlessly, customise configurations to their exact specifications, explore recommended retail prices, and choose from various rigging options across the FourStroke, Verado, and Pro XS ranges. *

*Indicated RRP excludes freight, fit up and statutory costs.

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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®.

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