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FourStroke
2.5-3.5 hp

Handheld Reliability

Portable power and thrust for exact operation.

  • Engine type 1 cylinder
  • Full throttle RPM 5000-6000
  • Steering Tiller with 360° turning
  • Dry weight *Lightest model available 38 lbs / 17 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.

Lightweight.

Weighing just 38 and 57 pounds, respectively, our 2.5 - 3.5hp and 4 - 6hp FourStroke outboards are easy to lift and carry.

Easy to Start.

Easy to Start.

Automatic decompression bleeds off cylinder pressure to reduce the pulling force required to start the engine.

Shallow Water.

Shallow Water.

Multiple trim positions enhance performance and enable shallow-water operation.

Precise Control.

Precise Control.

Mercury 2.5 and 3.5hp FourStroke engines feature neutral-forward shifting with 360-degree steering for full thrust in all directions.

Specifications

FourStroke: 2.5-3.5 hp

  • HP / kW
    • 3.5 / 2.6
    Engine type
    • 1 cylinder
    Displacement (CID/CC)
    • 5.2 / 85
    Full throttle RPM
    • 5000-6000
    Fuel induction system
    • 2-valve pushrod (overhead valve)
    Recommended fuel
    • 87% octane / up to 10% ethanol
    Recommended oil
    • Mercury FourStroke Oil 10W-30
    Engine protection operator warning system
    • Over-rev
    Starting
    • Manual
    Steering
    • Tiller with 360° turning
    Shaft length
    • 15" / 381 mm
    • 20" / 508 mm
    Gearcase ratio
    • 2.15:1
    Dry weight *Lightest model available
    • 38 lbs / 17 kg
    CARB star rating
    • 3
    Bore and stroke
    • 2.16 x 1.42" / 55 x 36 mm
    Ignition
    • CDI w/electronic spark advance
    Fuel system
    • Carbureted
    Cooling system
    • Water-cooled with thermostat
    Gear shift
    • F-N
    Gearcase options
    • Standard
    Trim system
    • 4 position
    Trim positions
    • 4
    Exhaust system
    • Above prop
    Shallow water trim range (degrees)
    • 16
    Integrated fuel tank (gal / L)
    • 0.3 / 1.1
    Color
    • Phantom Black
    Print Compare With Other Products
  • HP / kW
    • 2.5 / 1.9
    Engine type
    • 1 cylinder
    Displacement (CID/CC)
    • 5.2 / 85
    Full throttle RPM
    • 4500-5500
    Fuel induction system
    • 2-valve pushrod (overhead valve)
    Recommended fuel
    • 87 octane compatible (up to 10% ethanol)
    Recommended oil
    • Mercury FourStroke Oil 10W-30
    Engine protection operator warning system
    • Over-rev
    Starting
    • Manual
    Steering
    • Tiller with 360° turning
    Shaft length
    • 15" / 381 mm
    Gearcase ratio
    • 2.15:1
    Dry weight *Lightest model available
    • 38 lbs / 17 kg
    CARB star rating
    • 3
    Bore and stroke
    • 2.16 x 1.42" / 55 x 36 mm
    Ignition
    • CDI w/electronic spark advance
    Fuel system
    • Carbureted
    Cooling system
    • Water-cooled with thermostat
    Gear shift
    • F-N
    Gearcase options
    • Standard
    Trim system
    • 4 position
    Trim positions
    • 4
    Exhaust system
    • Above prop
    Shallow water trim range (degrees)
    • 16
    Color
    • Phantom Black
    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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