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FourStroke
75-115 hp

Unthink everything you know about FourStroke.

Tuned for max acceleration and throttle response.

See All Models and Specs

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 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

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).
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.

Smoother Than the Competition.

Smoother Than the Competition.

The Mercury 115 FourStroke has less vibration and rides more smoothly 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.
Calculate your fuel savings

Calculate your fuel savings

The Mercury Fuel Savings Calculator will allow you to easily calculate the possible fuel savings of a Mercury FourStroke outboard!

Choose how you use your boat, select the TwoStroke and FourStroke horsepower - and our tool will show your potential fuel savings. If you're looking to upgrade or add more power, you can even choose different FourStroke and TwoStroke horsepower options!

Calculate your fuel savings

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.

Worry-free

Worry-free

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

Outboard Cover - Protection for your FourStroke Outboard

Outboard Cover - Protection for your FourStroke Outboard

Protect your engine from stones, fishing hooks, lures and sinkers, and general wear and tear with these UV-stabilised, water-resistant, premium quality marine-grade covers with breathable mesh venting. A great way to keep your Mercury looking brand-new. Available now from your local Mercury Dealer to fit all new Mercury Outboards from 2-400hp. 

Full covers & combo covers also available.

We've got it covered.

Specifications

FourStroke: 75-115 hp

  • HP / kW
    • 115 / 84.6
    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 91 RON 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
    Gearcase ratio
    • 2.38:1
    Dry weight *Lightest model available
    • 363 lbs / 165 kg
    Emissions 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 Request a Quote
  • HP / kW
    • 115 / 84.6
    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 91 RON 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
    Gearcase ratio
    • 2.07:1
    Dry weight *Lightest model available
    • 359 lbs / 163 kg
    Emissions 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 Request a Quote
  • HP / kW
    • 100 / 73.6
    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 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
    Gearcase ratio
    • 2.07:1
    Dry weight *Lightest model available
    • 363 lbs / 165 kg
    Emissions 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 Request a Quote
  • HP / kW
    • 100 / 73.6
    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 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
    Gearcase ratio
    • 2.38:1
    Dry weight *Lightest model available
    • 363 lbs / 165 kg
    Emissions 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 Request a Quote
  • HP / kW
    • 90 / 66.2
    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 91 RON 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
    Gearcase ratio
    • 2.07:1
    Dry weight *Lightest model available
    • 359 lbs / 163 kg
    Emissions 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 Request a Quote
  • 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 91 RON 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
    Gearcase ratio
    • 2.38:1
    Dry weight *Lightest model available
    • 363 lbs / 165 kg
    Emissions 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 Request a Quote
  • HP / kW
    • 80 / 59.2
    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 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
    Gearcase ratio
    • 2.07:1
    Dry weight *Lightest model available
    • 363 lbs / 165 kg
    Emissions 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 Request a Quote
  • 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 91 RON 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
    Gearcase ratio
    • 2.07:1
    Dry weight *Lightest model available
    • 359 lbs / 163 kg
    Emissions 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 Request a Quote

Performance Tests

Read the reviews.

Mercury engineering reports and performance data. All available on-line for your review.

BHB - Boat House Bulletin Review
Test Date Engine Boat Prop Type
6/2017 90 hp FourStroke Crestliner - 1700 Vision SpitFire® BHB -
5/2014 90 hp FourStroke Crestliner - 1850 Pro Tiller SpitFire® BHB -
7/2017 90 hp Command Thrust FourStroke Barcrusher - 535 XS Enertia® BHB -
6/2017 90 hp Command Thrust FourStroke Stabicraft - 2100 Supercab Enertia® BHB -
11/2016 115 hp FourStroke Jackman - 7 Metre - BHB -
5/2016 115 hp FourStroke Crestliner - 2000 Arrow SpitFire® X7 BHB -
5/2016 90 hp FourStroke Crestliner - VT 18 C SpitFire® X7 BHB -
5/2016 115 hp FourStroke Crestliner - VT 18 SpitFire® X7 BHB -
6/2016 115 hp Command Thrust FourStroke Extreme Boats - 570 Sportfisher Enertia® BHB -
6/2016 115 hp Command Thrust FourStroke Stabicraft - 2400 Supercab Enertia® BHB -
6/2016 90 hp FourStroke Crestliner - 1650 Fish Hawk WT SpitFire® BHB -
5/2016 115 hp Command Thrust FourStroke Black Dog - 5.1 Dodger Hardtop Revolution 4® BHB -
9/2015 115 hp Command Thrust FourStroke AB Inflatables - Oceanus VST 24 Enertia® BHB -
9/2015 115 hp Command Thrust FourStroke Swift Marine - Swift bow door cat - BHB -
7/2015 115 hp Command Thrust FourStroke Gale Force - 5.5 CentreCab - BHB -
Test Date: 6/2017
Engine: 90 hp FourStroke
Boat: Crestliner - 1700 Vision
Prop: SpitFire®
Type: BHB -
Test Date: 5/2014
Engine: 90 hp FourStroke
Boat: Crestliner - 1850 Pro Tiller
Prop: SpitFire®
Type: BHB -
Test Date: 7/2017
Engine: 90 hp Command Thrust FourStroke
Boat: Barcrusher - 535 XS
Prop: Enertia®
Type: BHB -
Test Date: 6/2017
Engine: 90 hp Command Thrust FourStroke
Boat: Stabicraft - 2100 Supercab
Prop: Enertia®
Type: BHB -
Test Date: 11/2016
Engine: 115 hp FourStroke
Boat: Jackman - 7 Metre
Prop: -
Type: BHB -
Test Date: 5/2016
Engine: 115 hp FourStroke
Boat: Crestliner - 2000 Arrow
Prop: SpitFire® X7
Type: BHB -
Test Date: 5/2016
Engine: 90 hp FourStroke
Boat: Crestliner - VT 18 C
Prop: SpitFire® X7
Type: BHB -
Test Date: 5/2016
Engine: 115 hp FourStroke
Boat: Crestliner - VT 18
Prop: SpitFire® X7
Type: BHB -
Test Date: 6/2016
Engine: 115 hp Command Thrust FourStroke
Boat: Extreme Boats - 570 Sportfisher
Prop: Enertia®
Type: BHB -
Test Date: 6/2016
Engine: 115 hp Command Thrust FourStroke
Boat: Stabicraft - 2400 Supercab
Prop: Enertia®
Type: BHB -
Test Date: 6/2016
Engine: 90 hp FourStroke
Boat: Crestliner - 1650 Fish Hawk WT
Prop: SpitFire®
Type: BHB -
Test Date: 5/2016
Engine: 115 hp Command Thrust FourStroke
Boat: Black Dog - 5.1 Dodger Hardtop
Prop: Revolution 4®
Type: BHB -
Test Date: 9/2015
Engine: 115 hp Command Thrust FourStroke
Boat: AB Inflatables - Oceanus VST 24
Prop: Enertia®
Type: BHB -
Test Date: 9/2015
Engine: 115 hp Command Thrust FourStroke
Boat: Swift Marine - Swift bow door cat
Prop: -
Type: BHB -
Test Date: 7/2015
Engine: 115 hp Command Thrust FourStroke
Boat: Gale Force - 5.5 CentreCab
Prop: -
Type: BHB -

See All Performance Tests

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