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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 115 lbs / 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.

Repower Financing

Repower Financing

With Mercury Repower Financing, you can easily power up everything from fishing boats, to runabouts, to cruisers with flexible financing on the engine. You can also choose to finance rigging, gauges, controls and even labor. Mercury Repower Financing offers low rates and low monthly payments to fit a boater’s budget.

Click here for more information and get the performance you want!

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.

More Thrust.

More Thrust.

Mercury® ProKicker outboards feature a deeper gearcase and a four-blade, high-thrust propeller with matching gear ratio – the perfect setup for trolling and precise control in all conditions. The ProKicker gearcase is engineered to be rugged and durable, with robust gears and bearings and a heavy-duty skeg that’s 55% thicker and twice as strong side-to-side as the previous gearcase.

Power Tilt.

Power Tilt.

The fastest power tilt in the industry drops a Mercury 9.9 - 15hp ProKicker FourStroke outboard into the water in just five seconds. Exclusive kicker-centering straps align and secure the outboard in full tilt-up position while you’re underway.

Power in the Palm of Your Hand.

Power in the Palm of Your Hand.

Tiller models feature the exclusive Mercury multifunction tiller that puts

  • shifting
  • throttle control (with improved slow-speed throttle advance for optimal trolling)
  • stopping
  • tilting
  • steering

in the palm of your hand.

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
    • 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
    Gearcase ratio
    • 2.15:1
    Dry weight *Lightest model available
    • 115 lbs / 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 / 11.1
    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
    • 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
    Gearcase ratio
    • 2.15:1
    Dry weight *Lightest model available
    • 115 lbs / 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 / 11.1
    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
    • 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
    • 20" / 508 mm
    Gearcase ratio
    • 2.15:1
    Dry weight *Lightest model available
    • 135 lbs / 61 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

Performance Tests

Read the reviews.

Mercury engineering reports and performance data. All available on-line for your review.

BHB - Boat House Bulletin Review
Test Date Engine Boat Prop Type
7/2013 15 hp ProKicker FourStroke Apex - Gillgetter 713 Black Max® BHB -
11/2012 20 hp FourStroke Xtreme Boats - River Skiff 1442 SS - BHB -
4/2012 20 hp FourStroke MirroCraft - 1615 Outfitter Black Max® BHB -
Test Date: 7/2013
Engine: 15 hp ProKicker FourStroke
Boat: Apex - Gillgetter 713
Prop: Black Max®
Type: BHB -
Test Date: 11/2012
Engine: 20 hp FourStroke
Boat: Xtreme Boats - River Skiff 1442 SS
Prop: -
Type: BHB -
Test Date: 4/2012
Engine: 20 hp FourStroke
Boat: MirroCraft - 1615 Outfitter
Prop: Black Max®
Type: BHB -

See All Performance Tests

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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