50hp Mercury EFI 4S CT

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Mercury 50 HP Command Thrust Fourstroke - Get more for less. The Command Thrust delivers the performance of a larger engine for less. Incredibly reliable and easy to operate, they’re the last thing you have to worry about on the water.

Take Your Outboard To A New Level

Get more thrust, power and control on broad-beamed and heavier fibreglass boats. With a prop that sits deeper in the water and a larger diameter propellor with 20% more surface area, you’ll enjoy better manoeuvrability and get on the plane at lower speeds.

Engine Details

Ideal for aluminium tillers, aluminium consoles, pontoons, and fish & ski. The Command Thrust is suitable for heavier boats that sit low in the water or have trouble getting on the plane. 

Great for:

  • Heavily loaded boats
  • Commercial workboats
  • Deep V hulls
  • Houseboats
  • Pontoons


  • Extra thrust
  • Heavy duty
  • Get on plane quickly
  • Mid-range acceleration
  • Heavy duty
  • Planing at low speed
  • Fits the entire range of V6 propellers



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 91 RON Minimum
Recommended oil
    • Mercury FourStroke 25W40 Marine Oil
Engine protection operator warning system
    • SmartCraft Engine Guardian
Compatible with SmartCraft digital technology
    • Yes
    • Electric (turn-key)
    • Big Tiller Compatible
    • Remote
    • Tiller Kit
Shaft length
    • 20" / 508 mm
Gearcase ratio
    • 2.33:1
Dry weight *Lightest model available
    • 118 kg
Emissions Star Rating
    • 3
Bore and stroke
    • 2.56 x 2.95" / 65 x 75 mm
    • ECM 07 Digital Inductive
Fuel system
    • Electronic Fuel Injection (EFI)
Cooling system
    • Water-cooled with thermostat
Gear shift
    • F-N-R
Gearcase options
    • Command Thrust
Trim system
    • Power Trim
Exhaust system
    • Through prop
Shallow water trim range (degrees)
    • 20
Remote fuel tank (optional)
    • Yes
    • Phantom Black




Price: POA AUD
Brand: Mercury
Model: 50hp Mercury EFI 4S CT
Length: -
Year: 2021
Category: Boat Engines and Outboards
Hull Type: Other
Power Type: Engine/Motor
Engine Make: Mercury
Engine Type: 50hp Mercury EFI 4S CT
Condition: New
State: Queensland