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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

Summer - Here We Come Sales Event

Summer - Here We Come Sales Event

For a limited time, repower your current boat with a new Mercury 9.9hp ProKicker FourStroke or a 15hp ProKicker FourStroke and get your choice of a $150 rebate or special retail financing!

Electrical support.

Electrical support.

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

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.

Dependable starts and performance.

Dependable starts and performance.

Battery-free Electronic Fuel Injection (EFI) on Mercury 25 - 30hp FourStroke models delivers consistently easy starting, crisp throttle response, increased fuel economy and outstanding overall performance.

The Mercury-exclusive Primer and Fast Idle systems start our 15 - 20hp FourStrokes fast and easy – hot or cold – and aren’t affected by variable fuel quality.

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.

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.

Total Single-Handed Tiller Control.

Total Single-Handed Tiller Control.

Tiller-steered versions feature the exclusive Mercury multifunction tiller that puts shifting, throttle control (with friction for fine-tuned trolling), stopping, tilting and steering in the palm of your hand.

Defining Durability.

Defining Durability.

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.

Reliable and Easy Starts.

Reliable and Easy Starts.

Exclusive Primer and Fast Idle systems get Mercury 9.9 - 15hp ProKicker FourStroke outboards started fast – hot or cold – even if poor-quality fuel becomes a factor. Just push the primer button and go.

The exclusive push-button Primer and Fast Idle systems on the Mercury 8 - 9.9hp FourStroke engines deliver an easy start with quick warm-up. And it doesn’t struggle with poor-quality gas, unlike auto-choke systems used on some outboards.

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
    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
    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
    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 - 713 Gillgetter 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 - 713 Gillgetter
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

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