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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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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.

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.

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

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.

Easy portability

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

Engine Specifications by Horsepower

Scroll within the table below to view specifications for each engine.

Name 2.5 HP 3.5 HP 4hp 5hp 6hp EFI 6hp 8hp EFI 9.9hp EFI 15hp EFI 20 HP 20hp EFI
Horsepower 2.5 HP 3.5 HP 4 HP 5 HP 6 HP 6 HP 8 HP 9.9 HP 15 HP 20 HP 20 HP
Engine type 1-cyl 1-cyl 1-cyl 1-cyl I-2 1-cyl I- 2 I- 2 I- 2 Inline-2 I- 2
Displacement (CID/CC) 5.2 / 85 5.2 / 85 7.5 / 123 7.5 / 123 12.8/209 7.5 / 123 12.8 / 209 12.8 / 209 20.3 / 333 20.3/333 20.3 / 333
Displacement (L)
Cylinder Configuration
Full throttle RPM
Alternator amp / Watt
Starting - - - - -
Steering
Shaft length
Gearcase ratio
Dry weight *Lightest model available 41 lbs / 18 kg 41 lbs / 18 kg 57 lbs / 26 kg 57 lbs / 26 kg 39.9 kg 57 lbs / 26 kg 88lbs (40kg) 85 lbs / 38.5 kg; 100 lbs / 45.5 kg (CT) 12 amp / 145 watt electric start models 99 lbs/ 45kg 99 lbs / 45 kg
Trim system 4 position 4 position Power Trim Power Trim Racheting 6 Position w/ shallow water drive Power Trim Power Trim Manual Manual