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150 hp

Stronger. Lighter. More Durable.

Massive displacement and the lightest 150 hp four-stroke in its class

  • Engine type 8-valve single overhead cam (SOHC), Inline 4
  • Displacement (L) 3.0
  • Full throttle RPM 5000-5800
  • Steering Big Tiller Compatible, Dual cable mechanical, Electro-Hydraulic Power Steering Optional on Duals, Hydraulic power steering
  • Dry weight *Lightest model available 455 lbs / 206 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

“She Fishes” Chloe Laurence picks Mercury FourStroke

“She Fishes” Chloe Laurence picks Mercury FourStroke

Chloe Laurence is having a great time – breaking down stereotypes while doing what she loves.

A talented fisher with numerous tournament wins to her name, Chloe is helping to eliminate the myth that fishing’s just “a bloke’s sport” while encouraging everyone to try throwing in a line.

With a focus on inshore sports fishing as well as game fishing for marlin and tuna, Chloe spends as much time as she can out on the water – propelled by a brand new Mercury 150 FourStroke.

Find out why Chloe chose Mercury.

VesselView Mobile.

VesselView Mobile.

Now you can have the power of SmartCraft on your mobile device (iOS or Android) with all the digital data your SmartCraft engine supports - plus new features such as Maintenance Reminders, Mapping, Performance Summary and Fault Code Diagnostic information. Connect with your engine and be in the know.

  • Connects the SmartCraft data network to your iOS or Android mobile device via BLE (Bluetooth Low Energy 4.0)*
  • See SmartCraft engine parameters: fuel flow, water temperature, battery voltage, RPM, engine hours*
  • Get fault code diagnostic information so you know and understand if that fault is something to be addressed when you return back to the dock or it is something more significant*
  • Get mapping information for your body of water: location, record a moment on the water, fuel & restaurant locations and more
  • Dealer Locator and Primary Dealer selector
  • Checklists associated with your boating lifestyle
  • Maintenance reminders and historical maintenance information logs*
  • Compatible with all Mercury SmartCraft-capable engines built since 2003 (40 HP and up)
*VesselView Module required; available for purchase at Mercury Marine dealers, from the VesselView Mobile app or here
Android® is a registered trademark of Google®, Inc., Bluetooth® is a registered trademark of Bluetooth SIG, Inc., iOS® is a registered trademark of Cisco Systems®, Inc. (used under license by Apple®, Inc.), SmartCraft® and VesselView® are registered trademarks of Brunswick® Corporation.
Performance, Durability, Efficiency.

Performance, Durability, Efficiency.

Making 150 horsepower is easy for this 3.0-liter, four-cylinder, single-overhead-cam engine. Its generous displacement lets it churn out power without breaking a sweat. You get exceptional durability and long-term peace of mind.

Repower Financing.

Repower Financing.

With Mercury Repower Financing, you can easily power up everything from fishing boats, to runabouts, to cruisers with flexible financing on the engine. You can also choose to finance rigging, gauges, controls and even labor. Mercury Repower Financing offers low rates and low monthly payments to fit a boater’s budget.

Click here for more information and get the performance you want!

Compact and Versatile.

Compact and Versatile.

It’s the lightest 150hp four-stroke outboard on the market. Smart design makes the 150hp Mercury FourStroke nearly 20 pounds lighter than its closest four-stroke competitor, and less than a battery weight heavier than a two-stroke. Potential uses for this engine are endless, including bay boats, boats with poling platforms and pontoons with swim platforms.

6,000 hours in the Bahamas

6,000 hours in the Bahamas

Since its introduction to Mercury’s line of FourStroke engines, the 150hp has proved a valuable player in saltwater markets. Recently, Bernard Sweeting, an angler from Spanish Wells, St. George’s Cay, Bahamas, reported that his 150hp FourStroke reached more than 6,000 hours in commercial application, an impressive feat given the rough conditions that accompany commercial outboard use.

Propped to Perform.

Propped to Perform.

The Mercury Enertia® propeller is the perfect complement to the 150 FourStroke. Designed specifically for large four-stroke outboards with a revolutionary low-diameter/high-blade-area design and cast with the Mercury proprietary X7® propeller alloy, Enertia delivers phenomenal acceleration, top speed and durability.

Easy to Maintain.

Easy to Maintain.

Rather do it yourself? The no-spill oil-change system, an easy-access fuel filter and a lifetime maintenance-free valve train make the Mercury 150 FourStroke the easiest-to-maintain 150hp four-stroke on the market. Scan a QR code under the cowl to link with step-by-step video demonstrations.

Perfect for Repower.

Perfect for Repower.

The compact, lightweight design of the Mercury® 150hp FourStroke engine fits most transoms, including those with narrow engine wells and tight motor spacing. Rig it with mechanical or hydraulic steering, mechanical control and cable systems, and a full complement of analog or SmartCraft® gauges.


FourStroke: 150 hp

  • HP / kW
    • 150 / 110
    Engine type
    • 8-valve single overhead cam (SOHC)
    • Inline 4
    Displacement (L)
    • 3.0
    Full throttle RPM
    • 5000-5800
    Air induction
    • Performance-Tuned Scroll Intake Manifold
    Fuel induction system
    • Computer Controlled Multi-Port Electronic Fuel Injection (EFI)
    Alternator amp / Watt
    • 60 amp / 756 watt (Belt-Driven)
    Recommended fuel
    • Unleaded Regular 87 Octane Minimum (R+M/2) or 90 RON 10% Ethanol Maximum
    Recommended oil
    • Mercury FourStroke Oil 10W-30
    Engine protection operator warning system
    • SmartCraft Engine Guardian
    Compatible with SmartCraft digital technology
    • Yes
    • Electric (turn-key)
    • Smart Start Electric
    • Mechanical throttle & shift
    • Big Tiller Compatible
    • Dual cable mechanical
    • Electro-Hydraulic Power Steering Optional on Duals
    • Hydraulic power steering
    Shaft length
    • 20" / 508 mm
    • 25" / 635 mm
    Gearcase ratio
    • 1.92:1
    Dry weight *Lightest model available
    • 455 lbs / 206 kg
    CARB star rating
    • 3
    Bore and stroke
    • 4.0 x 3.6" / 102 x 92 mm
    • SmartCraft ECM 70 Digital Inductive
    Fuel system
    • Electronic Fuel Injection (EFI)
    Cooling system
    • Water-cooled with thermostat
    Gear shift
    • F-N-R
    Gearcase options
    • Standard
    Trim system
    • Power Tilt
    • Power Trim
    Exhaust system
    • Through prop
    Counter Rotation
    • Available
    • Phantom Black
    Lubrication system
    • Wet sump
    Oil Capacity
    • 6.3 qts / 6.0l
    Maximum Trim Range
    • 22° (-6° to 16°)
    Maximum Tilt Range
    • 73° (-6° to 67°)
    Print Compare With Other Products


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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