FourStroke 2.5-20 HP

Introducing the Mercury FourStroke. 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.
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.
Multiple trim positions to enhance performance and enable shallow-water operation. Through-prop exhaust makes it extra quiet.
Mercury 15 and 20hp FourStroke outboards are designed to improve every minute of your time on the water. The tiller can be adjusted for steering with either hand, adding convenience, while battery-free electronic fuel injection (EFI) and a twin-cylinder powerhead deliver reliability, easy starts, optimized fuel efficiency and outstanding power.

Texas Marine OUTBOARDS

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.

Texas Marine OUTBOARDS

FourStroke 2.5-20 HP Specs

  • 2.5 HP

    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.

    HP / kW2.5 / 1.9
    Engine type1 cylinder
    Displacement (CID/CC)5.2 / 85
    Full throttle RPM4500-5500
    Fuel induction system2-valve pushrod (overhead valve)
    Recommended fuel87 octane compatible (up to 10% ethanol)
    Recommended oilMercury FourStroke Oil 10W-30
    Engine protection operator warning systemOver-rev
    StartingManual
    SteeringTiller with 360° turning
    Shaft length15″ / 381 mm
    Gearcase ratio2.15:1
    Dry weight *Lightest model available41 lbs / 18 kg
    CARB star rating3
    Bore and stroke2.16 x 1.42″ / 55 x 36 mm
    IgnitionCDI w/electronic spark advance
    Fuel systemCarbureted
    Cooling systemWater-cooled with thermostat
    Gear shiftF-N
    Gearcase optionsStandard
    Trim system4 position
    Trim positions4
    Exhaust systemAbove prop
    Shallow water trim range (degrees)16
    Integrated fuel tank (gal / L)0.3 / 1.1
    ColorPhantom Black
  • 3.5 HP

    Delivers lightweight, portable power and thrust for exact operation. Perfect for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.

    HP / kW3.5 / 2.6
    Engine type1 cylinder
    Displacement (CID/CC)5.2 / 85
    Full throttle RPM5000-6000
    Fuel induction system2-valve pushrod (overhead valve)
    Recommended fuel87 octane / up to 10% ethanol
    Recommended oilMercury FourStroke Oil 10W-30
    Engine protection operator warning systemOver-rev
    StartingManual
    SteeringTiller with 360° turning
    Shaft length15″ / 381 mm

    20″ / 508 mm

    Gearcase ratio2.15:1
    Dry weight *Lightest model available41 lbs / 18 kg
    CARB star rating3
    Bore and stroke2.16 x 1.42″ / 55 x 36 mm
    IgnitionCDI w/electronic spark advance
    Fuel systemCarbureted
    Cooling systemWater-cooled with thermostat
    Gear shiftF-N
    Gearcase optionsStandard
    Trim system4 position
    Trim positions4
    Exhaust systemAbove prop
    Shallow water trim range (degrees)16
    Integrated fuel tank (gal / L)0.3 / 1.1
    ColorPhantom Black
  • 4 HP

    This lightweight motor features through-prop exhaust for extra-quiet operation. Great for aluminum tiller, inflatable soft hull, jon, utility, and sail boats.

    HP / kW4 / 2.9
    Engine type1 cylinder
    Displacement (CID/CC)7.5 / 123
    Full throttle RPM4500-5500
    Fuel induction system2-valve pushrod (overhead valve)
    Recommended fuel87 octane / up to 10% ethanol
    Recommended oilMercury FourStroke Oil 10W-30
    Engine protection operator warning systemLow oil pressure

    Over-rev

    StartingManual
    SteeringTiller
    Shaft length15″ / 381 mm

    20″ / 508 mm

    Gearcase ratio2.15:1
    Dry weight *Lightest model available57 lbs / 26 kg
    CARB star rating3
    Bore and stroke2.32 x 1.77″ / 59 x 45 mm
    IgnitionCDI w/electronic spark advance
    Fuel systemCarbureted
    Cooling systemWater-cooled with thermostat
    Gear shiftF-N-R
    Gearcase optionsStandard
    Trim positions6
    Exhaust systemThrough prop
    Shallow water driveYes
    Shallow water trim range (degrees)16
    Integrated fuel tank (gal / L)0.3 / 1.1
    Optional fuel tank (gal / L)3.2 / 12
    ColorPhantom Black
  • 5 HP Sail Power

    Engineered to meet the unique needs of sailboat enthusiasts. Also great for aluminum tiller, inflatable soft hull, jon, and utility boats.

    HP / kW5 / 3.7
    Engine type1 cylinder
    Displacement (CID/CC)7.5 / 123
    Full throttle RPM4500-5500
    Fuel induction system2-valve pushrod (overhead valve)
    Alternator amp / Watt4 amp / 50 watt lighting and charging
    Recommended fuel87 octane / up to 10% ethanol
    Recommended oilMercury FourStroke Oil 10W-30
    Engine protection operator warning systemLow oil pressure

    Over-rev

    StartingManual
    SteeringTiller
    Shaft length20″ / 508 mm
    Gearcase ratio2.15:1
    Dry weight *Lightest model available59 lbs / 27 kg
    CARB star rating3
    Bore and stroke2.32 x 1.77″ / 59 x 45 mm
    IgnitionCDI w/electronic spark advance
    Fuel systemCarbureted
    Cooling systemWater-cooled with thermostat
    Gear shiftF-N-R
    Gearcase optionsSail Power
    Trim positions6
    Exhaust systemThrough prop
    Shallow water driveYes
    Shallow water trim range (degrees)16
    Integrated fuel tank (gal / L)0.3 / 1.1
    Optional fuel tank (gal / L)3.2 / 12
    ColorPhantom Black
  • 5 HP

    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.

    HP / kW5 / 3.7
    Engine type1 cylinder
    Displacement (CID/CC)7.5 / 123
    Full throttle RPM4500-5500
    Fuel induction system2-valve pushrod (overhead valve)
    Recommended fuel87 octane / up to 10% ethanol
    Recommended oilMercury FourStroke Oil 10W-30
    Engine protection operator warning systemLow oil pressure

    Over-rev

    StartingManual
    SteeringTiller
    Shaft length15″ / 381 mm

    25″ / 635 mm

    Gearcase ratio2.15:1
    Dry weight *Lightest model available57 lbs / 26 kg
    CARB star rating3
    Bore and stroke2.32 x 1.77″ / 59 x 45 mm
    IgnitionCDI w/electronic spark advance
    Fuel systemCarbureted
    Cooling systemWater-cooled with thermostat
    Gear shiftF-N-R
    Gearcase optionsStandard
    Trim positions6
    Exhaust systemThrough prop
    Shallow water driveYes
    Shallow water trim range (degrees)16
    Integrated fuel tank (gal / L)0.3 / 1.1
    Optional fuel tank (gal / L)3.2 / 12
    ColorPhantom Black
  • 6 HP

    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.

    HP / kW6 / 4.4
    Engine type1 cylinder
    Displacement (CID/CC)7.5 / 123
    Full throttle RPM5000-6000
    Fuel induction system2-valve pushrod (overhead valve)
    Recommended fuel87 octane / up to 10% ethanol
    Recommended oilMercury FourStroke Oil 10W-30
    Engine protection operator warning systemLow oil pressure

    Over-rev

    StartingManual
    SteeringTiller
    Shaft length15″ / 381 mm

    20″ / 508 mm

    Gearcase ratio2.15:1
    Dry weight *Lightest model available57 lbs / 26 kg
    CARB star rating3
    Bore and stroke2.32 x 1.77″ / 59 x 45 mm
    IgnitionCDI w/electronic spark advance
    Fuel systemCarbureted
    Cooling systemWater-cooled with thermostat
    Gear shiftF-N-R
    Gearcase optionsStandard
    Trim positions6
    Exhaust systemThrough prop
    Shallow water driveYes
    Shallow water trim range (degrees)16
    Integrated fuel tank (gal / L)0.3 / 1.1
    Optional fuel tank (gal / L)3.2 / 12
    ColorPhantom Black
  • 8 HP

    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.

    HP / kW8 / 5.9
    Engine typeInline 2
    Displacement (CID/CC)12.8 / 208
    Full throttle RPM5000-6000
    Fuel induction system2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt6 amp / 76 watt
    Recommended fuel87 octane / up to 10% ethanol
    Recommended oilMercury FourStroke Oil 10W-30
    Engine protection operator warning systemLow oil pressure

    Over-rev

    StartingElectric

    Manual

    SteeringTiller
    Shaft length15″ / 381 mm

    20″ / 508 mm

    Gearcase ratio2.08:1
    Dry weight *Lightest model available84 lbs / 38 kg
    CARB star rating3
    Bore and stroke2.16 x 1.73″ / 55 x 44 mm
    IgnitionCDI w/electronic spark advance
    Fuel systemCarbureted
    Cooling systemWater-cooled with thermostat
    Gear shiftF-N-R
    Gearcase optionsStandard
    Trim positionsRatcheting
    Exhaust systemThrough prop
    Shallow water driveYes
    Shallow water trim range (degrees)16
    Remote fuel tank standard (gal / L)3.2 / 12
    ColorPhantom Black
  • 9.9 HP

    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.

    HP / kW9.9 / 7.3
    Engine typeInline 2
    Displacement (CID/CC)12.8 / 208
    Full throttle RPM5000-6000
    Fuel induction system2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt6 amp / 76 watt
    Recommended fuel87 octane / up to 10% ethanol
    Recommended oilMercury FourStroke Oil 10W-30
    Engine protection operator warning systemLow oil pressure

    Over-rev

    StartingElectric

    Manual

    SteeringRemote

    Tiller

    Shaft length15″ / 381 mm

    20″ / 508 mm

    25″ / 635 mm (CT model)

    Gearcase ratio2.08:1 or 2.42:1 (CT model)
    Dry weight *Lightest model available84 lbs / 38 kg
    CARB star rating3
    Bore and stroke2.16 x 1.73″ / 55 x 44 mm
    IgnitionCDI w/electronic spark advance
    Fuel systemCarbureted
    Cooling systemWater-cooled with thermostat
    Gear shiftF-N-R
    Gearcase optionsCommand Thrust (CT)

    Standard

    Trim systemPower Tilt (CT model)
    Trim positionsRatcheting
    Exhaust systemThrough prop
    Shallow water driveYes
    Shallow water trim range (degrees)16
    Remote fuel tank standard (gal / L)3.2 / 12
    ColorPhantom Black
  • 15 EFI

    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.

    HP / kW15 / 11.1
    Engine typeInline 2
    Displacement (CID/CC)20.3 / 333
    Full throttle RPM5700 – 6200
    Fuel induction system2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt12/145 electric
    Recommended fuel87 octane / up to 10% ethanol
    Recommended oil25W-40 Synthetic Blend

    Mercury FC-W 10W-30 4-Stroke Marine Oil

    Engine protection operator warning systemLow oil pressure

    Low water pressure

    Over-rev

    Overheat

    Sensor failure

    StartingElectric

    Manual

    SteeringRemote

    Tiller

    Shaft length15″ / 381 mm

    20″ / 508 mm

    25″ / 635 mm

    Gearcase ratio2.15:1
    Dry weight *Lightest model available99 lbs / 45 kg
    CARB star rating3
    Bore and stroke2.40 x 2.24″ / 61 x 57 mm
    IgnitionCDI w/electronic spark advance
    Fuel systemElectronic Fuel Injection (EFI)
    Cooling systemWater-cooled with thermostat
    Gear shiftF-N-R
    Gearcase optionsStandard
    Trim systemManual

    Power Tilt

    Trim positions6
    Exhaust systemThrough prop
    Shallow water driveYes
    Shallow water trim range (degrees)16
    Remote fuel tank (optional)Yes
    Remote fuel tank standard (gal / L)3.2 / 12
    ColorPhantom Black
  • 20 EFI

    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.

    HP / kW20 / 14.7
    Engine typeInline 2
    Displacement (CID/CC)20.3 / 333
    Full throttle RPM5700 – 6200
    Fuel induction system2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt12/145 electric
    Recommended fuel87 octane / up to 10% ethanol
    Recommended oil25W-40 Synthetic Blend

    Mercury FC-W 10W-30 4-Stroke Marine Oil

    Engine protection operator warning systemLow oil pressure

    Low water pressure

    Over-rev

    Overheat

    Sensor failure

    StartingElectric

    Manual

    SteeringRemote

    Tiller

    Shaft length15″ / 381 mm

    20″ / 508 mm

    Gearcase ratio2.15:1
    Dry weight *Lightest model available99 lbs / 45 kg
    CARB star rating3
    Bore and stroke2.40 x 2.24″ / 61 x 57 mm
    IgnitionCDI w/electronic spark advance
    Fuel systemElectronic Fuel Injection (EFI)
    Cooling systemWater-cooled with thermostat
    Gear shiftF-N-R
    Gearcase optionsStandard
    Trim systemManual

    Power Tilt

    Trim positions6
    Exhaust systemThrough prop
    Shallow water driveYes
    Shallow water trim range (degrees)16
    Remote fuel tank (optional)Yes
    Remote fuel tank standard (gal / L)3.2 / 12
    ColorPhantom Black

Interested In A FourStroke 2.5-20 HP?

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