Mercury MerCruiser
5.7L (250-hp)
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Mercury - Prop Selection

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Mercury - Prop Selection

Mercury explains how to select the right prop for your boat.

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Mercury MerCruiser 5.7L  (250-hp) Mercury MerCruiser 5.7L (250-hp)
Mercury MerCruiser's exclusive Turn Key Starting system is standard on all carbureted engines. This patented feature eliminates the hassle of starting a cold engine. Simply turn the key. No choke, no pumping or priming required. This means that the entire Mercury MerCruiser gas line-up features Turn Key Starting. No other engine manufacturer can match that.

Key Features

  • Thunderbolt V Hi-Energy Ignition and platinum-tipped spark plugs ensure reliable starts
  • Dry-joint exhaust eliminates the chance for water to enter engine through leaky gaskets
  • Water-separating fuel filter helps protect fuel system and engine against damage
  • Industry-exclusive 3-year limited corrosion failure warranty
  • Proven GM cast iron block V6 or V8 power for years of reliable operation
  • Ceramic coated exhaust elbows resist temperature and corrosion for long life
  • Serpentine belt system for longer belt life
  • Dual Plane intake manifold for improved fuel atomization means more power & torque
  • Revised fuel calibration for more crisp acceleration and improved running quality

Mercury MerCruiser 5.7L (250-hp) (Inboard) Specifications
Horsepower 270-hp
Warranty 3 Years
Displacement (cu/cc) 350.00 cu / 5,735.47 cc
Number of Cylinders 8 Cylinders
Configuration V8
Cooling System Raw Water
Weight (lbs/kg) 946.00 lbs / 429.10 kg
Charging System 65 A
Length/width/height 32 in / 30 in / 22 in
Full Throttle RPM 4800


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