FourStroke 175-300hp

Efficiency Without Compromise

Take your time on the water to a whole new level. Mercury FourStroke engines deliver unsurpassed power and performance in an efficient, reliable package. Tougher, smaller, and lighter than any other outboard motor on the water, built to go the distance on a wide variety of boats, and guaranteed to get you the most out of every adventure.

See All Specifications

Features

START FAST. FINISH STRONG.

No matter what you do out on the water, it's nice to have the kind of power that blows your hat off now and then.

The kind of power that gets you up on plane quicker. Gets you out there faster. And gets you home in record time.

Performance-Inspired Configuration:The four-valve, dual-overhead-cam design delivers greater acceleration.

Adaptive Speed Control (ASC):Maintains engine speed (rpm) regardless of load or condition changes—without having to frequently adjust throttle position.

Advanced Hydrodynamics:The FourStroke’s gearcase is designed to reduce drag and deliver more stable, high-speed performance.

LIGHT AND MIGHTY.

Mercury engineers worked hard to cut every possible pound from our FourStroke engines for enhanced portability and improved performance.

Advanced Range Optimization (ARO) and Closed-Loop Fuel Control: Work together to adjust the fuel mixture and deliver the best possible fuel efficiency.

Premium Power and Torque: Big, bold power in a lightweight package delivers better maneuverability, greater acceleration, and maximum exhilaration.

26-inch Mounting Centers: The FourStroke’s narrow, 64-degree bank angle and single-point cowl latch system enable a tighter fit to the engine block for a smaller profile.

SPECIFICATIONS

  • 300
  • 250
  • 225
  • 200
  • 175

FourStroke 300

HP / kW
  • 300 / 224
Engine type
  • V-8
MidSection
  • Conventional MidSection
Displacement (CID/CC)
  • 279 CID
Displacement (L)
  • 4.6L
Cylinder Configuration
  • V-8 [64 degree] with Dual Overhead Cam [DOHC] and 32-valves
Full throttle RPM
  • 5200-6000
Air induction
  • Performance-Tuned Long-Runner Intake Manifold
Fuel induction system
  • Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization
Alternator amp / Watt
  • 85-amp (1071 Watt) with Idle Charge
Recommended fuel
  • Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Recommended oil
  • NMMA Certified FCW SAE 10W-30
Engine protection operator warning system
  • SmartCraft Engine Guardian
Compatible with SmartCraft digital technology
  • Yes
Starting
  • Electric Start with SmartStart Protection
Controls
  • Remote Mechanical or Digital Throttle & Shift (DTS)
Steering
  • Hydraulic (standard)
  • Power (optional)
Shaft length
  • 20" / 508 mm
  • 25" / 635 mm
Gearcase ratio
  • 1.75:1
Dry weight *Lightest model available
  • 527 lbs / 239 kgs
CARB star rating
  • 3
Bore and stroke
  • 3.6 in x 3.4 in / 92 mm x 86 mm
Ignition
  • SmartCraft PCM 112 Digital Inductive
Cooling system
  • Water-cooled with thermostat
Gear shift
  • F-N-R
Gearcase options
  • 5.44"
Trim system
  • Power trim and tilt
Exhaust system
  • Through prop
Counter Rotation
  • Available
Color
  • Cold Fusion White
  • Pearl Fusion White
  • Phantom Black
  • Warm Fusion White
Lubrication system
  • Integrated wet sump
Oil Capacity
  • 7.0 Quarts / 6.6 Liters
Maximum Trim Range
  • 20° (-6° to 14°)
Maximum Tilt Range
  • 73° (-6° to 67°)

FourStroke 250

HP / kW
  • 250 / 186
Engine type
  • V-8
MidSection
  • Conventional MidSection
Displacement (CID/CC)
  • 279 CID
Displacement (L)
  • 4.6L
Cylinder Configuration
  • V-8 [64 degree] with Dual Overhead Cam [DOHC] and 32-valves
Full throttle RPM
  • 5200-6000
Air induction
  • Performance-Tuned Long-Runner Intake Manifold
Fuel induction system
  • Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization
Alternator amp / Watt
  • 85-amp (1071 Watt) with Idle Charge
Recommended fuel
  • Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Recommended oil
  • NMMA Certified FCW SAE 10W-30
Engine protection operator warning system
  • SmartCraft Engine Guardian
Compatible with SmartCraft digital technology
  • Yes
Starting
  • Electric Start with SmartStart Protection
Controls
  • Remote Mechanical or Digital Throttle & Shift (DTS)
Steering
  • Big Tiller (optional)
  • Hydraulic (standard)
  • Power (optional)
Shaft length
  • 20" / 508 mm
  • 25" / 635 mm
  • 30" / 762 mm
Gearcase ratio
  • 1.75:1
Dry weight *Lightest model available
  • 527 lbs / 239 kgs
CARB star rating
  • 3
Bore and stroke
  • 3.6 in x 3.4 in / 92 mm x 86 mm
Ignition
  • SmartCraft PCM 112 Digital Inductive
Cooling system
  • Water-cooled with thermostat
Gear shift
  • F-N-R
Gearcase options
  • 5.44"
Trim system
  • Power trim and tilt
Exhaust system
  • Through prop
Counter Rotation
  • Available
Color
  • Cold Fusion White
  • Pearl Fusion White
  • Phantom Black
  • Warm Fusion White
Lubrication system
  • Integrated wet sump
Oil Capacity
  • 7.0 Quarts / 6.6 Liters
Maximum Trim Range
  • 20° (-6° to 14°)
Maximum Tilt Range
  • 73° (-6° to 67°)

FourStroke 225

HP / kW
  • 225 / 168
Engine type
  • V-6
MidSection
  • Conventional MidSection
Displacement (CID/CC)
  • 209 CID
Displacement (L)
  • 3.4L
Cylinder Configuration
  • V-6 [64 degree] with Dual Overhead Cam [DOHC] and 24-valves
Full throttle RPM
  • 5200-6000
Air induction
  • Performance-Tuned Long-Runner Intake Manifold
Fuel induction system
  • Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization
Alternator amp / Watt
  • 85-amp (1071 Watt) with Idle Charge
Recommended fuel
  • Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Recommended oil
  • NMMA Certified FCW SAE 10W-30
Engine protection operator warning system
  • SmartCraft Engine Guardian
Compatible with SmartCraft digital technology
  • Yes
Starting
  • Electric Start with SmartStart Protection
Controls
  • Remote Mechanical or Digital Throttle & Shift (DTS)
Steering
  • Big Tiller (optional)
  • Hydraulic (standard)
  • Power (optional)
Shaft length
  • 20" / 508 mm
  • 25" / 635 mm
  • 30" / 762 mm
Gearcase ratio
  • 1.85:1
Dry weight *Lightest model available
  • 475 lbs / 216 kgs
CARB star rating
  • 3
Bore and stroke
  • 3.6 in x 3.4 in / 92 mm x 86 mm
Ignition
  • SmartCraft PCM 112 Digital Inductive
Cooling system
  • Water-cooled with thermostat
Gear shift
  • F-N-R
Gearcase options
  • 4.8"
Trim system
  • Power trim and tilt
Exhaust system
  • Through prop
Counter Rotation
  • Available
Color
  • Cold Fusion White
  • Pearl Fusion White
  • Phantom Black
  • Warm Fusion White
Lubrication system
  • Integrated wet sump
Oil Capacity
  • 7.0 Quarts / 6.6 Liters
Maximum Trim Range
  • 20° (-6° to 14°)
Maximum Tilt Range
  • 73° (-6° to 67°)

FourStroke 200

HP / kW
  • 200 / 149
Engine type
  • V-6
MidSection
  • Conventional MidSection
Displacement (CID/CC)
  • 209 CID
Displacement (L)
  • 3.4L
Cylinder Configuration
  • V-6 [64 degree] with Dual Overhead Cam [DOHC] and 24-valves
Full throttle RPM
  • 5000-5800
Air induction
  • Performance-Tuned Long-Runner Intake Manifold
Fuel induction system
  • Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization
Alternator amp / Watt
  • 85-amp (1071 Watt) with Idle Charge
Recommended fuel
  • Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Recommended oil
  • NMMA Certified FCW SAE 10W-30
Engine protection operator warning system
  • SmartCraft Engine Guardian
Compatible with SmartCraft digital technology
  • Yes
Starting
  • Electric Start with SmartStart Protection
Controls
  • Remote Mechanical or Digital Throttle & Shift (DTS)
Steering
  • Big Tiller (optional)
  • Hydraulic (standard)
  • Power (optional)
Shaft length
  • 20" / 508 mm
  • 25" / 635 mm
Gearcase ratio
  • 1.85:1
Dry weight *Lightest model available
  • 475 lbs / 216 kgs
CARB star rating
  • 3
Bore and stroke
  • 3.6 in x 3.4 in / 92 mm x 86 mm
Ignition
  • SmartCraft PCM 112 Digital Inductive
Cooling system
  • Water-cooled with thermostat
Gear shift
  • F-N-R
Gearcase options
  • 4.8"
Trim system
  • Power trim and tilt
Exhaust system
  • Through prop
Counter Rotation
  • Available
Color
  • Cold Fusion White
  • Pearl Fusion White
  • Phantom Black
  • Warm Fusion White
Lubrication system
  • Integrated wet sump
Oil Capacity
  • 7.0 Quarts / 6.6 Liters
Maximum Trim Range
  • 20° (-6° to 14°)
Maximum Tilt Range
  • 73° (-6° to 67°)

FourStroke 175

HP / kW
  • 175 / 130
Engine type
  • V-6
MidSection
  • Conventional MidSection
Displacement (CID/CC)
  • 209 CID
Displacement (L)
  • 3.4L
Cylinder Configuration
  • V-6 [64 degree] with Dual Overhead Cam [DOHC] and 24-valves
Full throttle RPM
  • 5000-5800
Air induction
  • Performance-Tuned Long-Runner Intake Manifold
Fuel induction system
  • Electronic Fuel Injection (EFI) Computer Controlled with Advanced Range Optimization
Alternator amp / Watt
  • 85-amp (1071 Watt) with Idle Charge
Recommended fuel
  • Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
Recommended oil
  • NMMA Certified FCW SAE 10W-30
Engine protection operator warning system
  • SmartCraft Engine Guardian
Compatible with SmartCraft digital technology
  • Yes
Starting
  • Electric Start with SmartStart Protection
Controls
  • Remote Mechanical or Digital Throttle & Shift (DTS)
Steering
  • Big Tiller (optional)
  • Hydraulic (standard)
  • Power (optional)
Shaft length
  • 20" / 508 mm
  • 25" / 635 mm
Gearcase ratio
  • 1.85:1
Dry weight *Lightest model available
  • 475 lbs / 216 kgs
CARB star rating
  • 3
Bore and stroke
  • 3.6 in x 3.4 in / 92 mm x 86 mm
Ignition
  • SmartCraft PCM 112 Digital Inductive
Cooling system
  • Water-cooled with thermostat
Gear shift
  • F-N-R
Gearcase options
  • 4.8"
Trim system
  • Power trim and tilt
Exhaust system
  • Through prop
Color
  • Phantom Black
Lubrication system
  • Integrated wet sump
Oil Capacity
  • 7.0 Quarts / 6.6 Liters
Maximum Trim Range
  • 20° (-6° to 14°)
Maximum Tilt Range
  • 73° (-6° to 67°)
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