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FourStroke
15-20 hp

All-in-one Performance

Intuitive maneuvering for precise control.

  • Engine type Inline 2
  • Full throttle RPM 5400-6100
  • Steering Remote, Tiller
  • Dry weight *Lightest model available 52 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

Electrical support.

Electrical support.

A high-output alternator keeps batteries charged and fishing electronics humming.

Calculate your fuel savings

Calculate your fuel savings

The Mercury Fuel Savings Calculator will allow you to easily calculate the possible fuel savings of a Mercury FourStroke outboard!

Choose how you use your boat, select the TwoStroke and FourStroke horsepower - and our tool will show your potential fuel savings. If you're looking to upgrade or add more power, you can even choose different FourStroke and TwoStroke horsepower options!

Calculate your fuel savings

Start Easily, Idle Smoothly.

Start Easily, Idle Smoothly.

Mercury 8hp to 20hp FourStroke outboards have features that make starting easier, warm-ups faster and idling smoother!

  • The fuel filter on 8hp to 20hp Mercury FourStrokes has been moved to keep the carburetor cleaner
  • Tiller handle models have a richer air/fuel mix at idle
  • They also come standard with a three-position choke, eliminating the need for a primer button
Great acceleration / more torque.

Great acceleration / more torque.

Compact but powerful, Mercury® 15 - 30hp FourStroke outboards feature extra displacement and outstanding low-end torque that put a boat smartly on plane.

Power in the Palms of Your Hands.

Power in the Palms of Your Hands.

The Tiller model features an exclusive Mercury multifunction tiller. It puts

  • shifting
  • throttle control (featuring an optimal slow-speed throttle advance function)
  • stopping
  • tilting
  • steering

in the palms of your hands.

Specifications

FourStroke: 15-20 hp

  • HP / kW
    • 20 / 14.7
    Engine type
    • Inline 2
    Displacement (CID/CC)
    • 21.4 / 351
    Full throttle RPM
    • 5400-6100
    Fuel induction system
    • 2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt
    • 12 amp / 138 watt
    Recommended fuel
    • Unleaded 90RON minimum
    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
    Gearcase ratio
    • 2.15:1
    Dry weight *Lightest model available
    • 52 kg
    CARB star rating
    • 3
    Bore and stroke
    • 2.40 x 2.36" / 61 x 60 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 system
    • Power Tilt
    Trim positions
    • 6
    Exhaust system
    • Through prop
    Shallow water drive
    • Yes
    Shallow water trim range (degrees)
    • 16
    Remote fuel tank standard (gal / L)
    • 6.6 / 25
    Color
    • Phantom Black
    Print Compare With Other Products
  • HP / kW
    • 15 / 11.0
    Engine type
    • Inline 2
    Displacement (CID/CC)
    • 21.4 / 351
    Full throttle RPM
    • 5000-6000
    Fuel induction system
    • 2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt
    • 12 amp / 138 watt
    Recommended fuel
    • Unleaded 90RON minimum
    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
    Gearcase ratio
    • 2.15:1
    Dry weight *Lightest model available
    • 52 kg
    CARB star rating
    • 3
    Bore and stroke
    • 2.40 x 2.36" / 61 x 60 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 system
    • Power Tilt
    Trim positions
    • 6
    Exhaust system
    • Through prop
    Shallow water drive
    • Yes
    Shallow water trim range (degrees)
    • 16
    Remote fuel tank standard (gal / L)
    • 6.6 / 25
    Color
    • Phantom Black
    Print Compare With Other Products
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