Bosun's Marine Logo

Four Stroke 40-60 HP

There are plenty of good reasons these Mercury outboards rule the water. Start with no-worry reliability. More low-end torque for excellent acceleration. Increased fuel economy and outstanding overall performance. Enhanced fuel injection (EFI models) for boosted efficiency. A robust electrical system with a high-output alternator to keep batteries charged and fishing electronics humming. They have everything you need, and nothing you don’t.
With a balanced powerhead and sophisticated cowl design, Mercury FourStroke outboards deliver an exceptionally smooth and quiet ride at any speed.
Explore farther and stay out longer thanks to an impressive power-to weight ratio and optimized fuel injection that maximize performance from every drop of fuel.
With features ranging from a no-spill oil change system and easy-access fuel filter, to a valve train that remains maintenance-free for the life of your engine, Mercury FourStroke outboards are easy to maintain for lasting peak performance.

Bosun's Marine OUTBOARDS

ALWAYS READY. ALL SEASON.

Start it up and go. Anytime. That’s the whole idea with a Mercury® FourStroke. Because it’s as close as you can get to maintenance-free. Tougher components, reliable electronic fuel injection (on select models), available SmartCraft® digital monitoring. More quality time in engineering means more quality time on the water.

Bosun's Marine OUTBOARDS

Four Stroke 40-60 HP Specs

  • 30 EFI

    A high-output alternator keeps batteries charged and fishing electronics humming. Great for aluminum tiller, aluminum console, jon, utility, and fish & ski boats.

    HP / kW 30 / 22.4
    Engine type Inline 3
    Displacement (CID/CC) 32.1 / 526
    Full throttle RPM 5250-6250
    Fuel induction system 2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt 15 amp / 186 watt
    Recommended fuel 87 octane / up to 10% ethanol
    Recommended oil Mercury FourStroke Oil 10W-30
    Engine protection operator warning system Low oil pressure

    Over-rev

    Overheat

    Sensor failure

    Starting Electric (turn-key)

    Manual

    Steering Remote

    Tiller

    Shaft length 15″ / 381 mm

    20″ / 508 mm

    Gearcase ratio 1.92:1
    Dry weight *Lightest model available 172 lbs / 78 kg
    CARB star rating 3
    Bore and stroke 2.40 x 2.36″ / 61 x 60 mm
    Ignition CDI w/electronic spark advance
    Fuel system Electronic Fuel Injection (EFI)
    Cooling system Water-cooled with thermostat
    Gear shift F-N-R
    Gearcase options Standard
    Trim system Gas assist

    Power Trim

    Exhaust system Through prop
    Shallow water trim range (degrees) 16
    Remote fuel tank standard (gal / L) 6.6 / 25
    Color Phantom Black
  • 40 EFI 4-Cylinder

    High-displacement, four-cylinder, single-overhead-cam design delivers optimum power and a smooth ride. Great for aluminum tiller, aluminum console, inflatable rigid hull (RIB) and soft hull, watersports, and fish & ski boats.

    HP / kW 40 / 30
    Engine type Inline 4
    Displacement (CID/CC) 60.8 / 995
    Full throttle RPM 5500-6000
    Fuel induction system 2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt 18 amp / 226 watt
    Recommended fuel 87 octane / up to 10% ethanol
    Recommended oil Mercury FourStroke 25W40 Marine Oil
    Engine protection operator warning system SmartCraft Engine Guardian
    Compatible with SmartCraft digital technology Yes
    Starting Electric (turn-key)
    Steering Big Tiller

    Remote

    Shaft length 20″ / 508 mm
    Gearcase ratio 2.33:1
    Dry weight *Lightest model available 260 lbs / 118 kg
    CARB star rating 3
    Bore and stroke 2.56 x 2.95″ / 65 x 75 mm
    Ignition ECM 07 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 Gas assist

    Power Tilt

    Power Trim

    Exhaust system Through prop
    Shallow water trim range (degrees) 20
    Remote fuel tank (optional) Yes
    Color Phantom Black
  • 40 EFI 3-Cylinder

    Mercury EFI outboards deliver reliable turnkey starts, improved fuel efficiency, and instant throttle response.

    HP / kW 40 / 30
    Engine type Inline 3
    Displacement (CID/CC) 45.6 / 747
    Full throttle RPM 5500-6000
    Fuel induction system 2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt 18 amp / 226 watt
    Recommended fuel 87 octane / up to 10% ethanol
    Recommended oil Mercury FourStroke 25W40 Marine Oil
    Engine protection operator warning system Low oil pressure

    Over-rev

    Overheat

    Compatible with SmartCraft digital technology Yes
    Starting Electric (turn-key)
    Steering Remote

    Tiller

    Shaft length 15″ / 381 mm

    20″ / 508 mm

    Gearcase ratio 2.00:1
    Dry weight *Lightest model available 204 lbs / 93 kg
    CARB star rating 3
    Bore and stroke 2.56 x 2.95″ / 65 x 75 mm
    Ignition ECM 70
    Fuel system Electronic Fuel Injection (EFI)
    Cooling system Water-cooled with thermostat
    Gear shift F-N-R
    Gearcase options Standard
    Trim system Gas assist

    Power Tilt

    Power Trim

    Exhaust system Through prop
    Shallow water trim range (degrees) 20
    Remote fuel tank (optional) Yes
    Color Phantom Black
    Lubrication system
    • Wet sump
  • 50 EFI

    Delivers more low-end torque for excellent acceleration, even when pushing a heavy load. Great for aluminum tiller, aluminum console, fish & ski boats and pontoons.

    HP / kW 50 / 37
    Engine type Inline 4
    Displacement (CID/CC) 60.8 / 995
    Full throttle RPM 5000-6000
    Fuel induction system 2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt 18 amp / 226 watt
    Recommended fuel 87 octane / up to 10% ethanol
    Recommended oil Mercury FourStroke 25W40 Marine Oil
    Engine protection operator warning system SmartCraft Engine Guardian
    Compatible with SmartCraft digital technology Yes
    Starting Electric (turn-key)
    Steering Remote

    Tiller

    Shaft length 20″ / 508 mm
    Gearcase ratio 1.83:1 or 2.33:1 (CT model)
    Dry weight *Lightest model available 247 lbs / 112 kg
    CARB star rating 3
    Bore and stroke 2.56 x 2.95″ / 65 x 75 mm
    Ignition ECM 07 Digital Inductive (CT model)

    ECM 70

    Fuel system Electronic Fuel Injection (EFI)
    Cooling system Water-cooled with thermostat
    Gear shift F-N-R
    Gearcase options Command Thrust (CT)

    Standard

    Trim system Power Trim
    Exhaust system Through prop
    Shallow water trim range (degrees) 20
    Remote fuel tank (optional) Yes
    Color Phantom Black
    Lubrication system
    • Wet sump
  • 60 EFI

    Matches the acceleration and fuel efficiency of our competitor’s more expensive 70hp outboard model. Great for aluminum tiller, aluminum console, jon, utility, and fish & ski boats.

    HP / kW 60 / 45
    Engine type Inline 4
    Displacement (CID/CC) 60.8 / 995
    Full throttle RPM 5500-6000
    Fuel induction system 2 valves per cylinder, single overhead cam (SOHC)
    Alternator amp / Watt 18 amp / 226 watt
    Recommended fuel 87 octane / up to 10% ethanol
    Recommended oil Mercury FourStroke 25W40 Marine Oil
    Engine protection operator warning system SmartCraft Engine Guardian
    Compatible with SmartCraft digital technology Yes
    Starting Electric (turn-key)
    Steering Remote

    Tiller

    Shaft length 20″ / 508 mm

    25″ / 635 mm (CT model)

    Gearcase ratio 1.83:1 or 2.33:1 (CT model)
    Dry weight *Lightest model available 247 lbs / 112 kg
    CARB star rating 3
    Bore and stroke 2.56 x 2.95″ / 65 x 75 mm
    Ignition ECM 07 Digital Inductive (CT model)

    ECM 70

    Fuel system Electronic Fuel Injection (EFI)
    Cooling system Water-cooled with thermostat
    Gear shift F-N-R
    Gearcase options Command Thrust (CT)

    Standard

    Trim system Power Trim
    Exhaust system Through prop
    Shallow water trim range (degrees) 20
    Remote fuel tank (optional) Yes
    Color Phantom Black
    Lubrication system Wet sump

Interested In A Four Stroke 40-60 HP?

Bosun's Marine is your premier destination for Mercury Outboard Engines. Discover the power, reliability, and innovation of Mercury’s world-renowned marine engines right here. Whether you’re a seasoned boater or a newcomer to the water, our expert team is dedicated to helping you find the perfect Mercury Outboard Engine to suit your needs.

Contact Us

We Can Finance Your Repower