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The Boating Shed > Reviews  > Mercury 115HP Four Stroke Review

Mercury 115HP Four Stroke Review

The Mercury Four Stroke 115 Horse Power Outboard Engine is a significant upgrade to its predecessor. Offering a lighter (the engine weighs 163 kg, just over 9kg less than the closest four-stroke competitor) and quieter experience due to a redesigned engine and cover made to reduce noise and vibration whilst providing more performance and better aesthetics, this engine is a definite contender in its range. A simplified design and build mean that the Mercury Four Stroke EFI has less weight than its ancestor whilst providing a greater displacement, at 2086 cc. An available extra, the Command Thrust, which is a sturdier engine leg, allows this motor to be utilised for more heavy usage, allowing a higher degree of control for planing, should it be required. In terms of the attention to detail with design, these motors have copper and stainless steel finishes, as well as the in-house MercFinish varnish, to ensure that maintenance is minimal, meaning less time cleaning, and more time on the water. More than anything however, the customisation capabilities of the Four Stroke put it far ahead of the competition. An added bonus is the integration of Mercury’s SmartCraft application, meaning digital statistics for your data, as well as reminders for maintenance. With a higher quality build, a smoother and more powerful experience, as well as the added benefit of app integration for monitoring the state of your engine, it leaves no doubt that the Mercury FourStroke 115HP lives up to its moniker, as an outboard that’s so light and quick it may as well have wings.

Light weight, fuel efficient and worry free.

  • HP / kW: 115 / 86
  • Engine type: 8-valve single overhead cam (SOHC) Inline 4
  • Displacement (L): 2.1
  • Full throttle RPM: 5000-6000
  • Air induction: Performance-Tuned Scroll Intake Manifold
  • Fuel induction system: Computer Controlled Multi-Port Electronic Fuel Injection (EFI)
  • Alternator amp / Watt: 35 amp / 441 watt with water-cooled voltage regulator
  • Recommended fuel: Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
  • Recommended oil: Mercury FourStroke Oil 10W-30
  • Engine protection operator warning system: SmartCraft Engine Guardian
  • Compatible with SmartCraft digital technology: Yes
  • Starting: Smart Start Electric
  • Controls: Mechanical throttle & shift
  • Steering: Big Tiller Compatible; Dual cable mechanical; Electro-Hydraulic Power Steering Optional on Duals; Hydraulic power steering
  • Shaft length: 20 in. / 508 mm
  • Gearcase ratio: 2.38:1
  • Dry weight *Lightest model available: 363 lb. / 165 kg
  • CARB star rating: 3
  • Bore and stroke: 3.5 x 3.2 in. / 90 x 81 mm
  • Ignition: SmartCraft ECM 70 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 Tilt; Power Trim
  • Exhaust system: Through prop
  • Shallow water trim range (degrees): 20
  • Counter Rotation: Available
  • Color: Phantom Black
  • Lubrication system: Wet sump
  • Oil Capacity: 5.5 qts / 5.2 l
  • Maximum Trim Range: 22° (-6° to 16°)
  • Maximum Tilt Range: 70° (-6° to 64°)

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