Mercury FourStroke 50EFI

Held to a Higher Standard.

There are plenty of good reasons these outboards rule the water. Start with no-worry reliability. More low-end torque for excellent acceleration. Increased fuel economy and outstanding overall performance. Enhanced fuel injection (EFI models) for boosted efficiency. A robust electrical system with a high-output alternator to keep batteries charged and fishing electronics humming. They have everything you need and nothing you don't.

Engine Details

Delivers more low-end torque for excellent acceleration, even when pushing a heavy load. Great for aluminum tiller, aluminum console, fish & ski boats and pontoons.
HP / kW
  • 50 / 37
Engine type
  • Inline 4
Displacement (CID/CC)
  • 60.8 / 995
Full throttle RPM
  • 5500-6000
Fuel induction system
  • 2 valves per cylinder, single overhead cam (SOHC)
Alternator amp / Watt
  • 18 amp / 226 watt
Recommended fuel
  • Unleaded 90RON minimum
Recommended oil
  • Mercury FourStroke 25W40 Marine Oil
Engine protection operator warning system
  • SmartCraft Engine Guardian
Compatible with SmartCraft digital technology
  • Yes
Details
Starting
  • Electric (turn-key)
Steering
  • Big Tiller Compatible
  • Remote
  • Tiller Kit
Shaft length
  • 20" / 508 mm
Gearcase ratio
  • 1.83:1 or 2.33:1 (CT model)
Dry weight *Lightest model available
  • 112 kg
CARB star rating
  • 3
Bore and stroke
  • 2.56 x 2.95" / 65 x 75 mm
Ignition
  • ECM 07 Digital Inductive (CT model)
  • ECM 70
Fuel system
  • Electronic Fuel Injection (EFI)
Cooling system
  • Water-cooled with thermostat
Gear shift
  • F-N-R
Gearcase options
  • Command Thrust (CT)
  • Standard
Trim system
  • Power Trim
Exhaust system
  • Through prop
Shallow water trim range (degrees)
  • 20
Remote fuel tank (optional)
  • Yes
Color
  • Phantom Black
Lubrication system
  • Wet sump