2018 Mercury FourStroke 20 HP EFI - 15 in. Shaft

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FourStroke 20 HP EFI - 15 in. Shaft



Output far beyond its size

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.

  • 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.
  • Small Outboards are of Big Importance: While high-horsepower models usually grab headlines in the world of outboard engines, it’s small outboards that make much of the boating world go around.
  • The world’s first portable outboard tiller handle with ambidextrous control: The innovative tiller handle for the new 20hp and 15hp outboards sets a new standard for portable-outboard tiller control, delivering features, functions and craftsmanship never seen before.
  • Announcing NEW Mercury 20hp & 15hp outboards: The ultimate boating experience comes standard. Mercury’s newest addition to its lineup of portable FourStroke outboard motors is designed and built to improve every aspect of your time on the water, from starting the engine to changing the oil and everything in between.
  • HP / kW: 20 / 14.7
  • Engine type: Inline 2
  • Displacement (CID/CC): 20.3 / 333
  • Full throttle RPM: 5700 - 6200
  • Fuel induction system: Single Overhead Cam
  • Alternator amp / Watt: 12/145 electric
  • Recommended fuel: 87% octane / up to 10% ethanol
  • Recommended oil: 25W-40 Synthetic Blend; Mercury FC-W 10W-30 4-Stroke Marine Oil
  • Engine protection operator warning system: Low oil pressure; Low water pressure; Over-rev; Overheat; Sensor failure
  • Starting: Electric; Manual
  • Steering: Remote; Tiller
  • Shaft length: 15" / 381 mm
  • Gearcase ratio: 2.15:1
  • Dry weight *Lightest model available: 99 lbs / 45 kg
  • CARB star rating: 3
  • Bore and stroke: 2.40 x 2.24" / 61 x 57 mm
  • Ignition: CDI w/electronic spark advance
  • Fuel system: Electronic Fuel Injection (EFI)
  • Cooling system: Water-cooled with thermostat
  • Gear shift: F-N-R
  • Gearcase options: Standard
  • Trim system: Manual; Power Tilt
  • Trim positions: 6
  • Exhaust system: Through prop
  • Shallow water drive: Yes
  • Shallow water trim range (degrees): 16
  • Remote fuel tank (optional): Yes
  • Remote fuel tank standard (gal / L): 6.6 / 25
  • Color: Phantom Black
Dry weight based on lightest model available.



Engine Type
Inline 2
Bore x Stroke
2.40 x 2.24 in. (61 x 57 mm)
20.3 cid (333 cc)
Electric; Manual


Shaft Length
15 in. (381 mm)
99 lb. (45 kg)


Trim Method
Manual; Power Tilt
Propshaft Horsepower
20 hp (14.7 kW)
Full Throttle Operating Range
5700 - 6200 rpm
Gear Ratio / Shift
2.15:1 / F-N-R
Fuel Induction
Single Overhead Cam
12/145 electric
Water-cooled with thermostat
Remote; Tiller

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