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FourStroke
8-9.9 hp

Start Easy

Incredibly responsive to get you going with little or no preparation.

  • Engine type Inline 2
  • Full throttle RPM 5000-6000
  • Steering Remote, Tiller
  • Dry weight *Lightest model available 38 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

Enhanced Features.

Enhanced Features.

The Mercury 8 and 9.9hp FourStroke outboards include:

  • New three-position choke and no primer button improve starting, simplify the starting procedure and allow the engine to warm up faster
  • A richer idle air/fuel mix makes the engine easier to start and provides better idle running quality (tiller handle models)
  • A change to the ignition timing allows fishermen to find and hold optimal troll speed
Command Thrust

Command Thrust

Big-time power. With a longer design and bigger components, Mercury Command Thrust was made specifically to deliver the type of power, thrust and control that wider, heavier boats demand.

The Command Thrust Difference (Blue shaded areas represent prop and gearcase advantages)

  • 20% larger prop increases control especially at low speeds.
  • Taller gearcase puts the prop deeper, below turbulent water, for improved performance.
  • A low 2.42:1 gear ratio delivers thrust and maneuveraility that big loads demand.
  • Oversized Antiventilation Plate. Oversized design prevents air from being drawn into the prop, which increases efficiency.
Convenient and Easy Tilting.

Convenient and Easy Tilting.

Push down on the tiller handle to easily tilt the outboard to any position, made easy with our exclusive ratcheting transom bracket.

Specifications

FourStroke: 8-9.9 hp

  • HP / kW
    • 9.9 / 7.3
    Engine type
    • Inline 2
    Displacement (CID/CC)
    • 12.8 / 208
    Full throttle RPM
    • 5000-6000
    Fuel induction system
    • 2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt
    • 6 amp / 76 watt
    Recommended fuel
    • Unleaded 90RON minimum
    Recommended oil
    • Mercury FourStroke Oil 10W-30
    Engine protection operator warning system
    • Low oil pressure
    • Over-rev
    Starting
    • Electric
    • Manual
    Steering
    • Remote
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 2.08:1
    Dry weight *Lightest model available
    • 38 kg
    CARB star rating
    • 3
    Bore and stroke
    • 2.16 x 1.73" / 55 x 44 mm
    Ignition
    • CDI w/electronic spark advance
    Fuel system
    • Carbureted
    Cooling system
    • Water-cooled with thermostat
    Gear shift
    • F-N-R
    Gearcase options
    • Standard
    Trim system
    • Power Tilt
    Trim positions
    • Ratcheting
    Exhaust system
    • Through prop
    Shallow water drive
    • Yes
    Shallow water trim range (degrees)
    • 16
    Integrated fuel tank (gal / L)
    • 3.2 / 12
    Remote fuel tank standard (gal / L)
    • 3.2 / 12
    Color
    • Phantom Black
    Print Compare With Other Products
  • HP / kW
    • 9.9 / 7.3
    Engine type
    • Inline 2
    Displacement (CID/CC)
    • 12.8 / 208
    Full throttle RPM
    • 5000-6000
    Fuel induction system
    • 2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt
    • 6 amp / 76 watt
    Recommended fuel
    • Unleaded 90RON minimum
    Recommended oil
    • Mercury FourStroke Oil 10W-30
    Engine protection operator warning system
    • Low oil pressure
    • Over-rev
    Starting
    • Electric
    • Manual
    Steering
    • Remote
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 2.42:1
    Dry weight *Lightest model available
    • 40 kg
    CARB star rating
    • 3
    Bore and stroke
    • 2.16 x 1.73" / 55 x 44 mm
    Ignition
    • CDI w/electronic spark advance
    Fuel system
    • Carbureted
    Cooling system
    • Water-cooled with thermostat
    Gear shift
    • F-N-R
    Gearcase options
    • Command Thrust
    Trim system
    • Power Tilt
    Trim positions
    • Ratcheting
    Exhaust system
    • Through prop
    Shallow water drive
    • Yes
    Shallow water trim range (degrees)
    • 16
    Integrated fuel tank (gal / L)
    • 3.2 / 12
    Remote fuel tank standard (gal / L)
    • 3.2 / 12
    Color
    • Phantom Black
    Print Compare With Other Products
  • HP / kW
    • 8 / 5.9
    Engine type
    • Inline 2
    Displacement (CID/CC)
    • 12.8 / 208
    Full throttle RPM
    • 5000-6000
    Fuel induction system
    • 2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt
    • 6 amp / 76 watt
    Recommended fuel
    • Unleaded 90RON minimum
    Recommended oil
    • Mercury FourStroke Oil 10W-30
    Engine protection operator warning system
    • Low oil pressure
    • Over-rev
    Starting
    • Electric
    • Manual
    Steering
    • Tiller
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 2.08:1
    Dry weight *Lightest model available
    • 38 kg
    CARB star rating
    • 3
    Bore and stroke
    • 2.16 x 1.73" / 55 x 44 mm
    Ignition
    • CDI w/electronic spark advance
    Fuel system
    • Carbureted
    Cooling system
    • Water-cooled with thermostat
    Gear shift
    • F-N-R
    Gearcase options
    • Standard
    Trim positions
    • Ratcheting
    Exhaust system
    • Through prop
    Shallow water drive
    • Yes
    Shallow water trim range (degrees)
    • 16
    Integrated fuel tank (gal / L)
    • 3.2 / 12
    Remote fuel tank standard (gal / L)
    • 3.2 / 12
    Color
    • Phantom Black
    Print Compare With Other Products
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