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.
Powerful & Efficient
Less weight and high displacement mean Mercury’s new 75 – 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.
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 20 pounds less than its closest four-stroke competitor, making it the world’s lightest low-emissions outboard in its power range.
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.
The same lifetime maintenance-free valvetrain design found in our 150 FourStroke engines makes the 75-115hp FourStroke outboards incredibly durable.
Smoother Than the Competition.
The Mercury 115 FourStroke has less vibration and rides smoother 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.
|HP / kW||100 / 74|
|Engine type||8-valve single overhead cam (SOHC)Inline 4|
|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 90RON minimum|
|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|
|Hydraulic power steering|
|Shaft length||20″ / 508 mm|
|25″ / 635 mm|
|Dry weight *Lightest model available||163 kg|
|CARB star rating||3|
|Bore and stroke||3.5 x 3.2″ / 90 x 81 mm|
|Ignition||SmartCraft ECM 70 Digital Inductive|
|Fuel system||Electronic Fuel Injection (EFI)|
|Cooling system||Water-cooled with thermostat|
|Trim system||Power Tilt|
|Exhaust system||Through prop|
|Shallow water trim range (degrees)||20|
|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°)|