The Ultimate 150hp Four-stroke

Boaters spoke and we listened. The new Mercury 150 FourStroke is the toughest, smallest, and lightest 150hp four-stroke engine in the world. In other words, another game-changing outboard from Mercury - just what you need to take your time on the water to the next level.

Tough enough for the most extreme conditions

Rock Solid

The new 3.0L Mercury 150hp FourStroke delivers class-leading displacement and stronger components than all other competitive 150hp outboards. Why is that important?

  • Some 3.0L outboards produce well over 250hp. This 3.0L Mercury FourStroke only needs to deliver 150hp, which means exceptional durability and long-term peace of mind.
  • The new 150hp FourStroke also features a robust 4.9" gearcase that uses larger, more durable components.
  • With nearly 10,000 hours of engineering and field testing, we made sure that this 150hp FourStroke is the world's most reliable outboard engine.

Light enough for efficient performance

Weight Chart

Lightweight Powerhouse

Normally the higher the displacement an outboard has, the more it weighs. Not in the case of the new 150hp FourStroke.

  • This Mercury FourStroke is the highest displacement and lightest 150hp fourstroke in the world.
  • At almost 20lbs lighter than its closest competitor, it's less than the weight of a battery away from a two-stroke. This makes the new 150hp FourStroke a great fit not only for new boat packages, but also repower, even on older boats which could not handle the weight of heavier competitive 4-Strokes.

Detailed Focus

When building the most durable outboard on the planet, Mercury engineers redesigned the entire outboard, down to the smallest details...

  • Mercury's Focused Mount System situates upper mounts at 45° angles to the engine centerline, virtually eliminating vibration.
  • The focused mounts are located away from the high-temperature powerhead, where the heat reduces longevity.
  • Transom brackets are 22% heavier than the Yamaha 150 and are tough enough for the most extreme operating conditions.

Built for Salt

Corrosion Chart

The new 150hp FourStroke delivers outstanding corrosion resistance through the following:

  • Lowest copper content aluminum.
  • 18 step painting process featuring an Electro-Deposition Paint system, which electronically bonds paint to metal throughout the engine, even inside internal water passages.
  • Waterproof electrical systems and connectors sit under a tightly sealed cowling system that uses a baffle to let air enter the cowl but forces water to drain out.

Tough Engine. Tough Warranty.

No other manufacturer offers:

  • 3-year non-declining factory-backed warranty.
  • 3-year industry-exclusive corrosion warranty.
  • Support from the largest network of Authorized Mercury Dealers.

A warranty that's supported by the strength and service expertise of one of the largest dealer networks in the country.

Two-Stroke torque. FourStroke Efficiency.

What do you get when you combine class-leading displacement with the lightest 150hp fourstroke on the market? Mercury's new definition of performance.

  • 3.0L displacement delivers the powerful torque needed to launch your boat onto plane and provide responsive mid-range acceleration.
  • An exceptional power-to-weight ratio means outstanding fuel economy and more on-water time between fill-ups.
  • A large 4.9" gearcase easily lifts heavy boats better than smaller gearcases found on competitive fourstrokes, significantly improving boat handling from slower cruising speeds to full throttle runs.

All Amped Up

The Mercury 150hp FourStroke's marine hardened "on-demand" alternator is a 60 Amp (756 Watt) high-output external unit. In fact, this alternator already produces over 2/3 of its charging power at just 1000 RPM... perfect for keeping batteries fully charged while trolling or on that leisurely cruise.

  • Belt-driven means less heat and weight.
  • Provides power only when needed.
  • Fully regulated at 14.2 volts.
  • Hard anodized for best-in-class corrosion protection.
QR Code

More Time on the Water. Less Time in the Shop.

Under the cowl, the new 150hp FourStroke has a convenient maintenance label highlighting basic maintenance intervals and requirements for the "do-it-yourself's". This label features a QR code that links to a series of step-by-step videos demonstrating just how easy it is to perform routine maintenance such as oil and gear lube changes.

  • QR code linking to videos, local dealers, and a Mercury-direct hotline.
  • No-spill oil change system and easy-access fuel filter.
  • The only fourstroke available with a valve train that requires NO maintenance over the life of the engine.

Perfect for Repower

Mercury's new 150 FourStroke has far less transom well interference and a lower profile making it easy to fish over and around, or to mount under tight fitting engine wells.

At a weight approaching that of a 2-Stroke, the new 150 FourStroke is the lightest of its kind, and will easily repower most older hulls not designed to accommodate the weight of competitive 150 4-Strokes.

Flexible enough to accommodate mechanical or hydraulic steering, the Big Tiller system, mechanical control/cables, and a full complement of either analog or SmartCraft gauges this new 150 FourStroke equally suited to the most basic or the most sophisticated of repower jobs.

Select:

150 FourStroke Specifications

HP/Kw @ Prop 150 / 110
Full throttle RPM 5000-5800
Cylinder Configuration In-Line 4, 8-valve single overhead cam (SOHC)
Displacement (CID / CC) 183 / 3000
Bore and Stroke (in / mm) 4.0 x 3.6in
102 x 92mm
Fuel Induction System Computer controlled Sequential Multi-Port Electronic Fuel Injection (EFI)
Ignition SmartCraft ECM 07 Digital Inductive
Fuel System Electronic Fuel Injection (EFI)
Alternator Amp 60 amp / 756 watt (Belt-Driven)
Cooling System Water-cooled with thermostat
Starting Electric (turn-key)
Gearcase Ratio 1.92:1
Gear Shift F-N-R
Steering Big Tiller Compatible
Mercury power steering
Hydraulic
Remote
Electro-hydraulic power steering
Trim System Power trim and tilt with SmartCraft programmable tilt
Counter Rotation Available
Recommended Oil Mercury 4-Stroke Outboard Oil
Recommended Fuel Unleaded Regular 87 Octane Minimum (R+M/2)
Engine Protection Operator Warning System SmartCraft Engine Guardian
Compatible with Smartcraft Digital Technology Yes
Shaft Length 20 in (508 mm)
25 in (635mm)
Dry Weight * Lightest model available 455lbs / 206kg

FourStrokes 150 HP Engine Tests

There are currently no engine tests for this product line.

FourStrokes 150 HP Resources

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
Request a Brochure

Request printed brochures by mail or download as an electronic PDF.

Request a Brochure

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Engine Tests 5 and Drive Fuel Care