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FourStroke
4-6 hp

Power Tender and Skiffs. Effortlessly.

57 pounds of agile performance.

  • Engine type 1 cylinder
  • Full throttle RPM 5000-6000
  • Steering Tiller
  • Dry weight *Lightest model available 57 lbs / 26 kg

The specifications displayed here may not be indicative of the entire engine family; click on the “See All Models and Specs” link to view the specs in detail.

See All Models and Specs

Generate Power.

Generate Power.

Convenience and performance you can count on. 4 amp alternator to charge a battery: exhaust relief holes and 6" prop for improved handling when reversing heavy boats; even an added rectifier to power small external lights. A 5hp FourStroke that powers your boat.

Lightweight.

Lightweight.

Weighing just 38 and 57 pounds, respectively, our 2.5 - 3.5hp and 4 - 6hp FourStroke outboards are easy to lift and carry.

Shallow Water.

Shallow Water.

Multiple trim positions enhance performance and enable shallow-water operation.

Quiet.

Quiet.

Through-prop exhaust on all Mercury® 4 - 6hp FourStrokes exits underwater for quiet operation.

Fueling Options.

Fueling Options.

Mercury® 4, 5 and 6hp FourStrokes feature integral fuel tanks with an external fuel-shutoff valve, as well as a fuel-tank cap on top of the cowl. For extended range, these engines also can be connected to a remote fuel tank placed in the boat.

Easy to Start.

Easy to Start.

Automatic decompression bleeds off cylinder pressure to reduce the pulling force required to start the engine.

Specifications

FourStroke: 4-6 hp

  • 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)
    Alternator amp / Watt
    • 4 lighting / 2 charging amp / 50 lighting / 25 charging watt (Optional)
    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
    Compare With Other Products
  • 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)
    Alternator amp / Watt
    • 4 lighting / 2 charging amp / 50 lighting / 25 charging watt (Optional)
    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
    • 25" / 635 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
    Compare With Other Products
  • 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)
    Alternator amp / Watt
    • 4 lighting / 2 charging amp / 50 lighting / 25 charging 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
    • Manual
    Steering
    • Tiller
    Shaft length
    • 20" / 508 mm
    Gearcase ratio
    • 2.15:1
    Dry weight *Lightest model available
    • 59 lbs / 27 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
    Compare With Other Products
  • 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)
    Alternator amp / Watt
    • 4 lighting / 2 charging amp / 50 lighting / 25 charging watt (Optional)
    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
    Compare With Other Products

Documents

Buy the Books
Buy the Books

You can order all available Mercury literature online or through any authorized Mercury dealer. Please have your outboard or sterndrive serial number before placing the order.

  • Operation, Maintenance, and Warranty Manuals
  • Parts Manual
  • Service Manual

Purchase a Manual

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