Lightweight & Fuel Efficient

Lightweight & Fuel Efficient

Mercury’s world-renowned engineering team has packed incredible power into these lighter, compact four-cylinder single-overhead-cam engines. The 115hp weighs 18 kilos less than its closest four-stroke competitor, making it the world’s lightest low-emissions outboard in its power range.

Dry weight specification is for the lightest-version model. Comparative weights refer to base engines without oil, propeller or integral steering cylinder. Weights based on Owner’s Manual specifications.
Bigger Footprint.

Bigger Footprint.

The larger Command Thrust gearcase creates a bigger footprint in the water, which provides more leverage to control your boat. The larger torpedo, combined with a bigger-diameter prop, can lift a heavy boat onto plane more easily and hold it there at lower speeds without impacting top speed.



Do you like to boat offshore even though you’re not in the market for a big boat? For the first time, Mercury is offering a 90hp & 115hp FourStroke with left-hand rotation. Two of these mid-range monsters on your transom provide the maneuverability and get-home safety of higher-horsepower twins at a price that’s easier on your wallet. Unlike competitive engines, dual 90 & 115 Mercury FourStrokes are Command Thrust models, which swing V6-class propellers, such as Enertia series to deliver improved acceleration and better boat control in rough water.

*Available only on 90 & 115 hp FourStroke



The same lifetime maintenance-free valvetrain design found in our 150 FourStroke engines makes the 80-115hp FourStroke outboards incredibly durable.

Powerful & Efficient

Powerful & Efficient

Less weight and high displacement mean Mercury’s new 80 - 115 FourStrokes generate abundant torque and immediate power. Because they don’t have to work as hard as heavier engines or those with lower displacement, these engines make boats plane faster, accelerate better and provide optimal fuel efficiency at cruising speed.

Quieter Than the Competition.

Quieter Than the Competition.

The Mercury 115 FourStroke is quieter than a competitive 115hp four-stroke across the rpm band.

  • At idle, the Mercury is four decibels quieter than the competition – the competitive outboard is 25% louder.
  • At cruising speed, where normal conversations occur, the competitive outboard generates almost 15% more noise.
  • At wide-open throttle, the Mercury is more than eight decibels quieter – the competitive outboard is 50% louder.
Testing performed by Mercury PD&E NVH staff at a Mercury Marine hemi-anechoic chamber (Sound Lab).
Smoother Than the Competition.

Smoother Than the Competition.

The Mercury 115 FourStroke has less vibration and rides more smoothly than a competitive 115hp four-stroke.

  • At forward idle, the Mercury’s vibration level at the driver’s seat is up to 50% lower than the competitive outboard.
  • On the transom, the competitive outboard puts out nearly five times more vibration than the Mercury – both at cruise and at full throttle.
Testing performed by Mercury PD&E NVH staff at a Mercury Marine test location on a 2013 Bayliner 170.



Take a deeper dive into what makes Mercury outboards stand apart with detailed information on each motor and the features that make them unique.