2.5-50hp

Starting reliability with gutsy performance

The secret to our mid-range is our renowned reliability thanks to its cool running. With high volume, low pressure, floppy-vane water impellers keeping operating conditions down.

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Engine Information and Specifications

Select Horsepower

50 LW 40 hp SUPER 30 15 Super 9.9 LW 9.9 Super 8 6 5 4 3.3 2.5
Compare Outboard Motors
  • 50 LW

    Engine Details

    Electric CDI ignition delivers high voltage for quick, sure starts and added fuel efficiency. Innovative sound attenuator helps absorb engine sounds before they can reach the ear, resulting in a quieter running engine on the TwoStroke 40 hp and higher models.

    Specifications - 50 LW

    HP / kW
    • 50 / 37.3
    Displacement (CID/CC)
    • 42.5 / 697
    Cylinder Configuration
    • I-3
    Full throttle RPM
    • 5150 - 5850
    Air induction
    • Loop-charged (3 carb)
    Starting
    • Electric
    • Manual
    Steering
    • Remote
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 1.85 : 1
    Dry weight *Lightest model available
    • 72 kg
    See All Specs
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  • 40 Super

    Engine Details

    Electric CDI ignition delivers high voltage for quick, sure starts and added fuel efficiency. Innovative sound attenuator helps absorb engine sounds before they can reach the ear, resulting in a quieter running engine on the TwoStroke 40 hp and higher models.

    Specifications - 40 hp SUPER

    HP / kW
    • 40 / 29.8
    Displacement (CID/CC)
    • 42.5 / 697
    Cylinder Configuration
    • I-3
    Full throttle RPM
    • 5000 - 5700
    Fuel induction system
    • Loop-charged (3 carb)
    Starting
    • Electric
    • Manual
    Steering
    • Remote
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 1.85 : 1
    Dry weight *Lightest model available
    • 72 kg
    See All Specs
    Find a Dealer Today
  • 30

    Engine Details

    The TwoStroke line includes the highest displacement engines in their horsepower classifications, plus they give outstanding power to weight ratios for best performance at all speeds.

    Specifications - 30

    HP / kW
    • 30 / 22.5
    Displacement (CID/CC)
    • 26.3 / 430
    Cylinder Configuration
    • I-2
    Full throttle RPM
    • 4750-5500
    Fuel induction system
    • Loop-charged (1 carb)
    Starting
    • Electric
    • Manual
    Steering
    • Remote
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 1.92:1
    Dry weight *Lightest model available
    • 51 kg
    See All Specs
    Find a Dealer Today
  • 15 Super

    Engine Details

    15 hp Mercury portable TwoStroke engines are lightweight and powerful, start easily with the modular electronic ignition and are part of the widest choice of portable power in the industry.

    Specifications - 15 Super

    HP / kW
    • 15 / 11.4
    Displacement (CID/CC)
    • 17.9 / 294
    Cylinder Configuration
    • I-2
    Full throttle RPM
    • 5200 - 5800
    Fuel induction system
    • Loop-charged (1 carb)
    Starting
    • Manual
    Steering
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 1.85 : 1
    Dry weight *Lightest model available
    • 41 kg
    See All Specs
    Find a Dealer Today
  • 9.9 Super

    Specifications - 9.9 LW

    HP / kW
    • 9.9 / 7.4
    Displacement (CID/CC)
    • 15.1 / 247
    Cylinder Configuration
    • l-2
    Full throttle RPM
    • 4500 - 5300
    Alternator amp / Watt
    • 7 amp/80 watt
    Starting
    • Manual
    Steering
    • Tiller
    Gearcase ratio
    • 1.85 : 1
    Dry weight *Lightest model available
    • 26 kg
    Trim positions
    • 6
    See All Specs
    Find a Dealer Today
  • 9.9 Super

    Engine Details

    The TwoStroke line includes the highest displacement engines in their horsepower classifications, plus they give outstanding power to weight ratios for best performance at all speeds.

    Specifications - 9.9 Super

    HP / kW
    • 9.9 / 7.4
    Displacement (CID/CC)
    • 15.07 / 247
    Cylinder Configuration
    • I-2
    Full throttle RPM
    • 4500-5300
    Fuel induction system
    • Loop-charged (1 carb)
    Recommended fuel
    • Pre-Mix 50:1
    Starting
    • Manual
    Steering
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 1.84:1
    See All Specs
    Find a Dealer Today
  • 8

    Engine Details

    8 hp Mercury portable TwoStroke engines are lightweight and powerful, start easily with the modular electronic ignition and are part of the widest choice of portable power in the industry.

    Specifications - 8

    HP / kW
    • 8 / 6
    Displacement (CID/CC)
    • 10.3 / 169
    Cylinder Configuration
    • I-2
    Full throttle RPM
    • 4500 - 5500
    Fuel induction system
    • Loop-charged (1 carb)
    Starting
    • Manual
    Steering
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 2.08 : 1
    Dry weight *Lightest model available
    • 26 kg
    See All Specs
    Find a Dealer Today
  • 6

    Engine Details

    6 hp Mercury portable TwoStroke engines are lightweight and powerful, start easily with the modular electronic ignition and are part of the widest choice of portable power in the industry.

    Specifications - 6

    HP / kW
    • 6 / 4.5
    Displacement (CID/CC)
    • 10.3 / 169
    Cylinder Configuration
    • I-2
    Full throttle RPM
    • 4500 - 5500
    Fuel induction system
    • Loop-charged (1 carb)
    Starting
    • Manual
    Steering
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 2.08 : 1
    Dry weight *Lightest model available
    • 26 kg
    See All Specs
    Find a Dealer Today
  • 5

    Engine Details

    5 hp Mercury portable TwoStroke engines are lightweight and powerful, start easily with the modular electronic ignition and are part of the widest choice of portable power in the industry.

    Specifications - 5

    HP / kW
    • 5 / 3.7
    Displacement (CID/CC)
    • 6.2 / 102
    Cylinder Configuration
    • 1
    Full throttle RPM
    • 4000 - 5000
    Fuel induction system
    • Loop-charged (1 carb)
    Starting
    • Manual
    Steering
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 2.15 : 1
    Dry weight *Lightest model available
    • 20 kg
    See All Specs
    Find a Dealer Today
  • 4

    Engine Details

    4 hp Mercury portable TwoStroke engines are lightweight and powerful, start easily with the modular electronic ignition and are part of the widest choice of portable power in the industry.

    Specifications - 4

    HP / kW
    • 4 / 3
    Displacement (CID/CC)
    • 6.2 / 102
    Cylinder Configuration
    • 1
    Full throttle RPM
    • 4500 - 5500
    Fuel induction system
    • Loop-charged (1 carb)
    Starting
    • Manual
    Steering
    • Tiller
    Shaft length
    • 15" / 381 mm
    Gearcase ratio
    • 2.15 : 1
    Dry weight *Lightest model available
    • 20 kg
    See All Specs
    Find a Dealer Today
  • 3.3

    Engine Details

    3.3 hp Mercury portable TwoStroke engines are lightweight and powerful, start easily with the modular electronic ignition and are part of the widest choice of portable power in the industry.

    Specifications - 3.3

    HP / kW
    • 3.3 / 2.5
    Displacement (CID/CC)
    • 4.6 / 74.6
    Cylinder Configuration
    • 1
    Full throttle RPM
    • 4500 - 5500
    Fuel induction system
    • Loop-charged (1 carb)
    Starting
    • Manual
    Steering
    • Tiller with 360° turning
    Shaft length
    • 15" / 381 mm
    Gearcase ratio
    • 2.15 : 1
    Dry weight *Lightest model available
    • 13 kg
    See All Specs
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  • 2.5

    Engine Details

    The simple TwoStroke design creates an engine that is less complex and lighter, with automatic low oil level warning for an added peace of mind.

    Specifications - 2.5

    HP / kW
    • 2.5 / 1.9
    Displacement (CID/CC)
    • 4.6 / 74.6
    Cylinder Configuration
    • 1
    Full throttle RPM
    • 4200 - 5200
    Starting
    • Manual
    Steering
    • Tiller with 360° turning
    Shaft length
    • 15" / 381 mm
    Gearcase ratio
    • 1.85 : 1
    Dry weight *Lightest model available
    • 13 kg
    Emissions Star Rating
    • 0
    See All Specs
    Find a Dealer Today

Proven Reliability

Mercury's proven TwoStroke engines deliver easy starting, gutsy performance, and great all-round reliability. Across the range you’ll find an array of features that help keep your boating experiences more enjoyable and trouble-free. Features such as largest engine capacity displacement, giving you more low-end thrust, advanced carburetor design and fully-regulated, high output alternators powering all your marine electronics will ensure absolute boating excellence. 

Running Quality

Running Quality

Electric CDI ignition delivers high voltage for quick, sure starts and added fuel efficiency. Innovative sound attenuator helps absorb engine sounds before they can reach the ear, resulting in a quieter running engine on the TwoStroke 40 hp and higher models.

The ideal power companion

The ideal power companion

The TwoStroke line includes the highest displacement engines in their horsepower classifications, plus they give outstanding power to weight ratios for best performance at all speeds.  

Embracing Technology

The simple TwoStroke design creates an engine that is less complex and lighter, with automatic low oil level warning for an added peace of mind. 

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

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