2.5-25hp
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 best-in-class acceleration to go with best-in-class speed. Easy to install and operate, with reliable starting, low vibration and instant throttle response. It's worry-free boating at its best.
Engine Information and Specifications
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![20 EFI]()
Engine Details
Ultra-lightweight (just 99 pounds) and reliable, with little vibration. Innovative tiller lets you lock the tiller at 73 degrees – great for fishing and trailering. Perfect for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.Specifications - 20 EFI
HP / kW - 20 / 14.7
Engine type - Inline 2
Displacement (CID/CC) - 20.3 / 333
Full throttle RPM - 5700 - 6200
Fuel induction system - Single Overhead Cam
Alternator amp / Watt - 12/145 electric
Recommended fuel - 87 octane / up to 10% ethanol
Recommended oil - 25W-40 Synthetic Blend
- Mercury FC-W 10W-30 4-Stroke Marine Oil
Engine protection operator warning system - Low oil pressure
- Over-rev
- Overheat
- Sensor failure
Starting - Electric
- Manual
Steering - Remote
- Tiller
Shaft length - 15" / 381 mm
- 20" / 508 mm
Gearcase ratio - 2.15:1
Dry weight *Lightest model available - 99 lbs / 45 kg
CARB star rating - 3
Emissions Star Rating - 3
Bore and stroke - 2.40 x 2.24" / 61 x 57 mm
Ignition - CDI w/electronic spark advance
Fuel system - Electronic Fuel Injection (EFI)
Cooling system - Water-cooled with thermostat
Gear shift - F-N-R
Gearcase options - Standard
Trim system - Manual
- Power Tilt
Trim positions - 6
Exhaust system - Through prop
Shallow water drive - Yes
Shallow water trim range (degrees) - 16
Remote fuel tank (optional) - Yes
Remote fuel tank standard (gal / L) - 3.2 / 12
Color - Phantom Black
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![9.9]()
Engine Details
Built to deliver the type of power, thrust, and control that wider, heavier boats require. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.Specifications - 9.9
HP / kW - 9.9 / 7.3
Engine type - Inline 2
Displacement (CID/CC) - 12.8 / 208
Full throttle RPM - 5000-6000
Fuel induction system - 2 valves per cylinder, single overhead cam (SOHC)
Alternator amp / Watt - 6 amp / 76 watt
Recommended fuel - 87 octane / up to 10% ethanol
Recommended oil - Mercury FourStroke Oil 10W-30
Engine protection operator warning system - Low oil pressure
- Over-rev
Starting - Electric
- Manual
Steering - Remote
- Tiller
Shaft length - 15" / 381 mm
- 20" / 508 mm
- 25" / 635 mm
Gearcase ratio - 2.08:1
Dry weight *Lightest model available - 84 lbs / 38 kg
CARB star rating - 3
Emissions Star Rating - 3
Bore and stroke - 2.16 x 1.73" / 55 x 44 mm
Ignition - CDI w/electronic spark advance
Fuel system - Carbureted
Cooling system - Water-cooled with thermostat
Gear shift - F-N-R
Gearcase options - Standard
Trim positions - Ratcheting
Exhaust system - Through prop
Shallow water drive - Yes
Shallow water trim range (degrees) - 16
Integrated fuel tank (gal / L) - 3.2 / 12
Remote fuel tank standard (gal / L) - 3.2 / 12
Color - Phantom Black
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![8]()
Engine Details
Enhancements include simplified starting procedure, faster warmup, and better idle run quality. Lightweight: just 84 pounds. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.Specifications - 8
HP / kW - 8 / 5.9
Engine type - Inline 2
Displacement (CID/CC) - 12.8 / 208
Full throttle RPM - 5000-6000
Fuel induction system - 2 valves per cylinder, single overhead cam (SOHC)
Alternator amp / Watt - 6 amp / 76 watt
Recommended fuel - 87 octane / up to 10% ethanol
Recommended oil - Mercury FourStroke Oil 10W-30
Engine protection operator warning system - Low oil pressure
- Over-rev
Starting - Electric
- Manual
Steering - Tiller
Shaft length - 15" / 381 mm
- 20" / 508 mm
Gearcase ratio - 2.08:1
Dry weight *Lightest model available - 84 lbs / 38 kg
CARB star rating - 3
Emissions Star Rating - 3
Bore and stroke - 2.16 x 1.73" / 55 x 44 mm
Ignition - CDI w/electronic spark advance
Fuel system - Carbureted
Cooling system - Water-cooled with thermostat
Gear shift - F-N-R
Gearcase options - Standard
Trim positions - Ratcheting
Exhaust system - Through prop
Shallow water drive - Yes
Shallow water trim range (degrees) - 16
Integrated fuel tank (gal / L) - 3.2 / 12
Remote fuel tank standard (gal / L) - 3.2 / 12
Color - Phantom Black
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![6]()
Engine Details
Feature integral fuel tanks with an external fuel-shutoff valve. For extended range, they can also be connected to a remote fuel tank. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.Specifications - 6
HP / kW - 6 / 4.4
Engine type - 1 cylinder
Displacement (CID/CC) - 7.5 / 123
Full throttle RPM - 5000-6000
Fuel induction system - 2-valve pushrod (overhead valve)
Recommended fuel - 87 octane / up to 10% ethanol
Recommended oil - Mercury FourStroke Oil 10W-30
Engine protection operator warning system - Low oil pressure
- Over-rev
Starting - Manual
Steering - Tiller
Shaft length - 15" / 381 mm
- 20" / 508 mm
Gearcase ratio - 2.15:1
Dry weight *Lightest model available - 57 lbs / 26 kg
CARB star rating - 3
Emissions Star Rating - 3
Bore and stroke - 2.32 x 1.77" / 59 x 45 mm
Ignition - CDI w/electronic spark advance
Fuel system - Carbureted
Cooling system - Water-cooled with thermostat
Gear shift - F-N-R
Gearcase options - Standard
Trim positions - 6
Exhaust system - Through prop
Shallow water drive - Yes
Shallow water trim range (degrees) - 16
Integrated fuel tank (gal / L) - 0.3 / 1.1
Optional fuel tank (gal / L) - 3.2 / 12
Color - Phantom Black
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![5]()
Engine Details
Multiple trim positions to enhance performance and enable shallow-water operation. Through-prop exhaust makes it extra quiet. Lightweight: just 57 pounds. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.Specifications - 5
HP / kW - 5 / 3.7
Engine type - 1 cylinder
Displacement (CID/CC) - 7.5 / 123
Full throttle RPM - 4500-5500
Fuel induction system - 2-valve pushrod (overhead valve)
Recommended fuel - 87 octane / up to 10% ethanol
Recommended oil - Mercury FourStroke Oil 10W-30
Engine protection operator warning system - Low oil pressure
- Over-rev
Starting - Manual
Steering - Tiller
Shaft length - 15" / 381 mm
- 20" / 508 mm
Gearcase ratio - 2.15:1
Dry weight *Lightest model available - 57 lbs / 26 kg
CARB star rating - 3
Bore and stroke - 2.32 x 1.77" / 59 x 45 mm
Ignition - CDI w/electronic spark advance
Fuel system - Carbureted
Cooling system - Water-cooled with thermostat
Gear shift - F-N-R
Gearcase options - Standard
Trim positions - 6
Exhaust system - Through prop
Shallow water drive - Yes
Shallow water trim range (degrees) - 16
Integrated fuel tank (gal / L) - 0.3 / 1.1
Optional fuel tank (gal / L) - 3.2 / 12
Color - Phantom Black
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![4]()
Engine Details
This lightweight motor features through-prop exhaust for extra-quiet operation. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.Specifications - 4
HP / kW - 4 / 2.9
Engine type - 1 cylinder
Displacement (CID/CC) - 7.5 / 123
Full throttle RPM - 4500-5500
Fuel induction system - 2-valve pushrod (overhead valve)
Recommended fuel - 87 octane / up to 10% ethanol
Recommended oil - Mercury FourStroke Oil 10W-30
Engine protection operator warning system - Low oil pressure
- Over-rev
Starting - Manual
Steering - Tiller
Shaft length - 15" / 381 mm
- 20" / 508 mm
Gearcase ratio - 2.15:1
Dry weight *Lightest model available - 57 lbs / 26 kg
CARB star rating - 3
Bore and stroke - 2.32 x 1.77" / 59 x 45 mm
Ignition - CDI w/electronic spark advance
Fuel system - Carbureted
Cooling system - Water-cooled with thermostat
Gear shift - F-N-R
Gearcase options - Standard
Trim positions - 6
Exhaust system - Through prop
Shallow water drive - Yes
Shallow water trim range (degrees) - 16
Integrated fuel tank (gal / L) - 0.3 / 1.1
Optional fuel tank (gal / L) - 3.2 / 12
Color - Phantom Black
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![3.5]()
Engine Details
Delivers lightweight, portable power and thrust for exact operation. Perfect for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.Specifications - 3.5
HP / kW - 3.5 / 2.6
Engine type - 1 cylinder
Displacement (CID/CC) - 5.2 / 85
Full throttle RPM - 5000-6000
Fuel induction system - 2-valve pushrod (overhead valve)
Recommended fuel - 87 octane / up to 10% ethanol
Recommended oil - Mercury FourStroke Oil 10W-30
Engine protection operator warning system - Over-rev
Starting - Manual
Steering - Tiller with 360° turning
Shaft length - 15" / 381 mm
- 20" / 508 mm
Gearcase ratio - 2.15:1
Dry weight *Lightest model available - 41 lbs / 18 kg
CARB star rating - 3
Emissions Star Rating - 3
Bore and stroke - 2.16 x 1.42" / 55 x 36 mm
Ignition - CDI w/electronic spark advance
Fuel system - Carbureted
Cooling system - Water-cooled with thermostat
Gear shift - F-N
Gearcase options - Standard
Trim system - 4 position
Trim positions - 4
Exhaust system - Above prop
Shallow water trim range (degrees) - 16
Integrated fuel tank (gal / L) - 0.3 / 1.1
Color - Phantom Black
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![2.5]()
Engine Details
Weighing in at just 38 pounds, this compact, reliable motor is a great choice for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.Specifications - 2.5
HP / kW - 2.5 / 1.9
Engine type - 1 cylinder
Displacement (CID/CC) - 5.2 / 85
Full throttle RPM - 4500-5500
Fuel induction system - 2-valve pushrod (overhead valve)
Recommended fuel - 87 octane compatible (up to 10% ethanol)
Recommended oil - Mercury FourStroke Oil 10W-30
Engine protection operator warning system - Over-rev
Starting - Manual
Steering - Tiller with 360° turning
Shaft length - 15" / 381 mm
Gearcase ratio - 2.15:1
Dry weight *Lightest model available - 41 lbs / 18 kg
CARB star rating - 3
Emissions Star Rating - 3
Bore and stroke - 2.16 x 1.42" / 55 x 36 mm
Ignition - CDI w/electronic spark advance
Fuel system - Carbureted
Cooling system - Water-cooled with thermostat
Gear shift - F-N
Gearcase options - Standard
Trim system - 4 position
Trim positions - 4
Exhaust system - Above prop
Shallow water trim range (degrees) - 16
Color - Phantom Black
SMALL OUTBOARDS ARE OF BIG IMPORTANCE
While high-horsepower models usually grab headlines in the world of outboard engines, it’s small outboards that make much of the boating world go around.
Announcing NEW Mercury 20hp & 15hp outboards
The ultimate boating experience comes standard. Mercury’s newest addition to its lineup of portable FourStroke outboard motors is designed and built to improve every aspect of your time on the water, from starting the engine to changing the oil and everything in between. Watch here.
Request a Quote
Your local Mercury Marine dealer can help you find the right engine for your needs.
Award-winning tiller handle
Mercury Marine's tiller handle assembly for the 15 and 20hp portable outboard motors won the 2018 award in the "Propulsion Parts" category at the annual International Boatbuilders' Exhibition & Conference (IBEX). This new tiller handle features several remarkable advancements to make the steering, shifting and throttle operation of portable outboards more intuitive, comfortable and responsive, and is the world's first portable outboard tiller that offers ambidextrous operation.
FOURSTROKE TECHNOLOGY AND MERCURY
Always moving forward. With boater-driven innovations and technologies. Like the world's first multi-function tiller handle. And a total commitment to corrosion protection, utilizing hard-coat anodizing and a superior multi-step paint process. Mercury FourStroke engines have consistently set the bar for clean, quiet performance and low fuel consumption. Plus, no one has more models to fit your needs.