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FourStroke
75-115 hp

None More Durable. Or Efficient.

Tuned for max acceleration and throttle response.

  • Engine type 8-valve single overhead cam (SOHC), Inline 4
  • Displacement (L) 2.1
  • Full throttle RPM 5000-6000
  • Steering Big Tiller Compatible, Dual cable mechanical, Hydraulic power steering
  • Dry weight *Lightest model available 359 lbs / 163 kg

The specifications displayed here may not be indicative of the entire engine family; click on the “See All Models and Specs” link to view the specs in detail.

See All Models and Specs

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 20 pounds 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.
Worry-free

Worry-free

The same lifetime maintenance-free valvetrain design found in our 150 FourStroke engines makes the 75-115hp FourStroke outboards incredibly durable.

VesselView Mobile.

VesselView Mobile.

Now you can have the power of SmartCraft on your mobile device (iOS or Android) with all the digital data your SmartCraft engine supports - plus new features such as Maintenance Reminders, Mapping, Performance Summary and Fault Code Diagnostic information. Connect with your engine and be in the know.

  • Connects the SmartCraft data network to your iOS or Android mobile device via BLE (Bluetooth Low Energy 4.0)*
  • See SmartCraft engine parameters: fuel flow, water temperature, battery voltage, RPM, engine hours*
  • Get fault code diagnostic information so you know and understand if that fault is something to be addressed when you return back to the dock or it is something more significant*
  • Get mapping information for your body of water: location, record a moment on the water, fuel & restaurant locations and more
  • Dealer Locator and Primary Dealer selector
  • Checklists associated with your boating lifestyle
  • Maintenance reminders and historical maintenance information logs*
  • Compatible with all Mercury SmartCraft-capable engines built since 2003 (40 HP and up)
*VesselView Module required; available for purchase at Mercury Marine dealers, from the VesselView Mobile app or here
Android® is a registered trademark of Google®, Inc., Bluetooth® is a registered trademark of Bluetooth SIG, Inc., iOS® is a registered trademark of Cisco Systems®, Inc. (used under license by Apple®, Inc.), SmartCraft® and VesselView® are registered trademarks of Brunswick® Corporation.
Counter-Rotation

Counter-Rotation

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 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 dual 115hp engines, dual 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 115 hp

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.

Quieter Than the Competition.

Quieter Than the Competition.

The Mercury 115 FourStroke is quieter than the Yamaha F115B across the rpm band.

  • At idle, the Mercury is four decibels quieter than the Yamaha – the Yamaha is 25% louder.
  • At cruising speed, where normal conversations occur, the Yamaha generates almost 15% more noise.
  • At wide-open-throttle, the Mercury is more than eight decibels quieter – the Yamaha 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 smoother than the Yamaha F115B.

  • At forward idle, the Mercury’s vibration level at the driver’s seat is up to 50% lower than the Yamaha.
  • On the transom, the Yamaha 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.
Propped to perform

Propped to perform

The Mercury Enertia® propeller is the perfect complement to the 75 - 115hp FourStroke Command
Thrust gearcases. Designed specifically for large fourstroke outboards with a revolutionary low-diameter / high-blade-area design and cast with the Mercury proprietary X7® propeller alloy, Enertia delivers phenomenal acceleration, top speed and durability.

Repower Financing.

Repower Financing.

With Mercury Repower Financing, you can easily power up everything from fishing boats, to runabouts, to cruisers with flexible financing on the engine. You can also choose to finance rigging, gauges, controls and even labor. Mercury Repower Financing offers low rates and low monthly payments to fit a boater’s budget.

Click here for more information and get the performance you want!

Powerful & Efficient

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.

Specifications

FourStroke: 75-115 hp

  • 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
    • Hydraulic power steering
    Shaft length
    • 20" / 508 mm
    • 25" / 635 mm
    Gearcase ratio
    • 2.07:1
    Dry weight *Lightest model available
    • 359 lbs / 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
    Gear shift
    • F-N-R
    Gearcase options
    • Standard
    Trim system
    • Power Tilt
    • Power Trim
    Exhaust system
    • Through prop
    Shallow water trim range (degrees)
    • 20
    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°)
    Print Compare With Other Products
  • 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" / 508 mm
    • 25" / 635 mm
    Gearcase ratio
    • 2.38:1
    Dry weight *Lightest model available
    • 363 lbs / 165 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
    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°)
    Print Compare With Other Products
  • HP / kW
    • 90 / 67
    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
    • Hydraulic power steering
    Shaft length
    • 20" / 508 mm
    • 25" / 635 mm
    Gearcase ratio
    • 2.07:1
    Dry weight *Lightest model available
    • 359 lbs / 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
    Gear shift
    • F-N-R
    Gearcase options
    • Standard
    Trim system
    • Power Tilt
    • Power Trim
    Exhaust system
    • Through prop
    Shallow water trim range (degrees)
    • 20
    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°)
    Print Compare With Other Products
  • HP / kW
    • 90 / 67
    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
    • Hydraulic power steering
    Shaft length
    • 20" / 508 mm
    • 25" / 635 mm
    Gearcase ratio
    • 2.38:1
    Dry weight *Lightest model available
    • 363 lbs / 165 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
    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
    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°)
    Print Compare With Other Products
  • HP / kW
    • 75 / 56
    Engine type
    • 8-valve single overhead cam (SOHC)
    • Inline 4
    Displacement (L)
    • 2.1
    Full throttle RPM
    • 4500-5500
    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
    • Hydraulic power steering
    Shaft length
    • 20" / 508 mm
    Gearcase ratio
    • 2.07:1
    Dry weight *Lightest model available
    • 359 lbs / 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
    Gear shift
    • F-N-R
    Gearcase options
    • Standard
    Trim system
    • Power Tilt
    • Power Trim
    Exhaust system
    • Through prop
    Shallow water trim range (degrees)
    • 20
    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°)
    Print Compare With Other Products

Documents

Buy the Books
Buy the Books

You can order all available Mercury literature online or through any authorized Mercury dealer. Please have your outboard or sterndrive serial number before placing the order.

  • Operation, Maintenance, and Warranty Manuals
  • Parts Manual
  • Service Manual

Purchase a Manual

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