250r engine

4.6L V8
250R

PERFORMANCE PERFECTED

The Mercury Racing 250R delivers unrivaled performance for lightweight, single-engine sport, bass and bay boats. The 250R outboard has the muscle to lift a heavy tournament boat out of the hole plus the deep-breathing power and high-performance components required to reach outrageous speeds, with confidence. Run with the Mercury Racing 250R on the transom and run out front.

Mercury Racing 250R
Mercury Racing 250R
250R engine
250R engine
Mercury Racing 250R
250r engine

A word from Mercury Racing

“Only Mercury Racing could deliver this level of V8 performance in the 250 class.”

Mike Griffiths

Mike Griffiths

Hydrodynamics Specialist

Tri-Ram Midsection

Strong and rock-steady, the Mercury Racing tri-ram midsection features solid lower engine mounts and a high-durometer upper mount for enhanced stability and handling at high speeds, critical for confident control in the fastest, single-engine applications.

Tri-Ram Midsection
Long-Runner Intake

Long-Runner Intake

Mercury Racing has tuned the 250R outboard model to produce the perfect combination of low-end grunt and high-winding horsepower. A performance-tuned intake runner helps pack more air through the deep-breathing 32-valve dual overhead cam valve train to squeeze more power from the V8 4.6-liter engine. Mercury Transient Spark Technology optimizes torque output for stronger hole-shot performance.

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SPORT MASTER GEARCASE

The race-proven Sport Master surface-piercing gearcase is designed specifically for speeds greater than 85 mph and features low water pick ups and a crescent leading edge to maximize efficiency and velocity. Use a selection of Mercury Racing propellers to dial-in performance.

Sport gearcase
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Feel the Power.

The dual muffler system of Advanced Sound Control offers the option of a deep sport tone with a stirring growl on start-up.

250r engine
Mercury Racing 250R

GO FARTHER, FASTER

To squeeze more power from less fuel, naturally aspirated Mercury Racing V8 outboards feature Advanced Range Optimization (ARO), a closed loop fuel-control system that utilizes electronic sensors to precisely adjust the fuel mixture for the best-possible efficiency at all speeds. Mercury Racing 250R is engineered to be reliable and durable. A rugged midsection is designed to handle all the high-performance abuse the water can dish out. Superior protection against corrosion begins with the industry’s lowest-copper aluminum alloy and exclusive, comprehensive finish treatments. These high-performance outboards are tested, tested and tested again – in the lab and on the water – in a never-ending quest to exceed the highest expectations.

Facts and Figures
View all specifications

Facts & Figures

FULL THROTTLE RPM

5600-6200

RATED HP

250

CYLINDERS

V8

DISPLACEMENT

4.6 L

Product details

SHAFT LENGTH 20
TRIM SYSTEM Standard
MID SECTION Standard
SKEG Camber
WARRANTY 3-Year²
BORE & STROKE 3.6 x 3.4 IN/92 x 86 MM
INDUCTION SYSTEM Performance-Tuned Long Runner Intake Manifold
FUEL REQUIREMENT Performance-Tuned Long Runner Intake Manifold
FUEL REQUIREMENT Unleaded Regular 87 Octane Minimum (R+M/2) Or 91 RON
FUEL SYSTEM Electronic Fuel Injection (EFI) Computer Controlled With Advanced Range Optimization
IGNITION SYSTEM SmartCraft PCM 112 Digital Inductive
CHARGING 85 AMP
IDLE CHARGE Yes
STARTING Electric Start With SmartStart Protection
OIL REQUIREMENT NMMA Certified FCW SAE 10W-30
JPO OPTION No
THROTTLE & SHIFT CONTROLS Mechanical
GEARCASE Sport Master
GEAR RATIO 1.75:1
DRY WEIGHT 520 LBS
IDLE RPM 600
MOUNTS Hard rubber
ENGINE TYPE V-8 NA 4S
LUBRICATION SYSTEM Integrated Wet Sump
GEAR SHIFT F-N-R

Phantom Black

250r

Power Steering Option

Enhance high-speed control and all-around comfort with optional Mercury electro-hydraulic power steering. Smooth and precise electronically actuated throttle and shifting matched to manual controls eases re-power installations and enables easier installation of a foot throttle.

Power Steering Option
87 Octane

87 Octane

The Mercury Racing 250R delivers a reliable, powerful performance punch on readily available 87-octane fuel.

Idle Charge

Exclusive Idle Charge battery management helps prevent battery drain on boats loaded with power-hungry fishing electronics and audio systems. When Idle Charge detects low battery voltage it automatically increases idle rpm to boost alternator output until batteries are recharged. An 85 amp belt-driven alternator is designed to run cooler and maintain peak charging performance in the most-demanding conditions.

Idle Charge
SmartCraft Technology

SmartCraft Technology

SmartCraft® Integrated Marine Technology with Engine Guardian® monitors vital engine sensors for early indications of problems and takes corrective action to reduce the risk of engine damage. Critical engine data can also be displayed on a SmartCraft System instrument or a compatible display screen.

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R-Series Outboard
Sterndrives
Competition
500R Rule the Water

Experience the future of luxury from the most advanced high-performance outboard on the water.

400R Ignite Your Passion

Rise above with the 400R – where extraordinary power meets exceptional drivability.

300R The Power to Stand Out

A fusion of breathtaking speed and control, the 300R is pure adrenaline-pumping freedom.

250R Perform at Your Peak

The stunning 250R elevates high performance on single-engine bass and sport boats.

200R Command Every Moment

Sophisticated power and digital controls for an exceptionally comfortable high-speed experience.

150R Live for More

A lightweight, exhilarating power plant for those who test the limits in midsized high-performance boats.

60R The Tactical Flats Advantage

Unleash your potential with the 60R, crafted for serious flats anglers who demand the best.

Dual Cal 1550/1350 Exceed All Expectations

Unshakeable strength. Unbelievable speeds. Our most powerful sterndrive engine outmuscles all challengers.

Dual Cal 1350/1100 Rev Your Life

Two selectable performance calibrations ensure you maximize your thrills based on available fuel.

1100 Blaze Ahead

With heart-pumping power and monumental torque, the 1100 delivers a purely exhilarating experience.

700 SCI An Offshore Legend

A compact, rugged, supercharged performance machine – the absolute formula for power.

600 SCI Dream of Speed

With legendary drive, the 600 SCi shines on high-performance, single-engine boats.

565 Mighty Big-Block Muscle

A flawless blend of big-block power and effortless digital control that never fails to impress.

520 Light Your Fuse

Hand-crafted with precision, this compact powerhouse cranks out 520hp of back-in-your-seat performance.

  • ROS
  • APX
  • Sterndrive
ROS Tough Enough for the Best

On the challenging waters of offshore powerboat racing, nothing can match the strength of the ROS series.

APX Own the Podium

APX engines dominate closed-course powerboat competition with the most advanced four-stroke racing technology.

Competition Sterndrive Show-Stopping Power

When the only option is winning, offshore racers turn to Mercury Racing sterndrive competition engines.

350R Engine
Propellers
Controls & Rigging
Oils & Lubes
  • Profile
  • Precision
  • Cases & Covers
  • Prop Hub Kits
Profile Series Hand-Finished Performance

Profile Series props are cast to your specs then expertly tuned and hand-balanced by experienced craftsmen.

Precision Series Digitally Mastered Props

Precision Series props are sculpted to perfection using 5-axis CNC technology.

Cases & Covers Protect What Moves You

The finest art deserves the best protection, and your Mercury Racing prop is no different.

Prop Hub Kits Made for Extreme

From engine-specific to rugged, high-speed options, Mercury Racing hubs unlock absolute performance.

  • Digital Zero Effort Controls
  • Joystick Piloting
  • Performance Active Trim
  • Integrated Transom System
  • X-Haust Noise Reducer
  • K-Plane Trim Tabs
  • DTS Perfomance Pedal
Digital Zero Effort Controls Smooth. Effortless. Instant.

Experience total command from premium digital controls designed for smooth, drive-by-wire precision.

Joystick Piloting Fingertip Control

Dock and maneuver with ease thanks to precision-guided 360-degree handling.

Performance Active Automated Ease

Digitally controlled trim automatically adjusts to ensure the most efficient, smooth ride.

Integrated Transom System Run with Attitude

Made for Bravo One XR® sterndrives, with integral power steering cylinders for a clean, pleasing connection.

X-Haust Noise Reducer Quiet Power You’ll Feel

Bring your high-performance sterndrive in compliance with regional noise regulations.

K-Plane Trim Tabs The Gold Standard

K-Plane® trim tabs maintain instantly responsive performance under the most punishing conditions.

DTS Performance Pedal Smaller sensor. Cleaner install.

A new throttle input sensor is roughly 20% the size of the outgoing pedal’s sensor, reducing packaging space and simplifying mounting in tight cockpits.

  • Racing Lubricants
Racing Lubricants Extreme Protection

Run at the redline with premium lubricants formulated to protect high-intensity engines regularly pushed to extremes.

Propellers & Accessories
About Mercury Racing

In a world that sets limits, Mercury Racing sets you free. We craft the most advanced high-performance marine propulsion systems on the water, empowering you to live life at the extreme.

Explore
350R Engine
Our Heritage

It began with an unquenchable desire to win. With roots in performance boat racing, we’ve spent more than five decades perfecting the art of speed while redefining what’s possible on the water.

Explore
350R Engine
Service & Maintenance

Whether you want technical advice to unlock a new level of speed or you need routine service, Mercury Racing stands behind you with expertise and support.

Service & Maintenance
Service & Maintenance
Refresh Program

The QC4 Factory Refresh Program is a chance to turn back the clock by having the same team of master technicians who originally built your engine restore it to factory-fresh condition.

Refresh Program
Refresh Program
Engines
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R-Series Outboard
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60R The Tactical Flats Advantage
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Dual Cal 1550/1350
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700 SCI
565
Competition
  • ROS
  • APX
  • Sterndrive
Race Offshore
ROS Tough Enough for the Best
APX
Alt Own the Podium
Competition Sterndrive
Competition Sterndrive Show-Stopping Power
Propellers & Accessories
  • Propellers
  • Controls & Rigging
  • Oils & Lubes
Propellers
  • Profile Series
  • Precision Series
  • Cases & Covers
  • Prop Hub Kits
Profile Series
Profile Series Hand-Finished Performance
Precision Series
Precision Series Digitally Mastered Props
Cases & Covers
Alt Protect What Moves You
Prop Hub Kits
Prop Hub Kits Made for Extreme
Controls & Rigging
  • Digital Zero Effort Controls
  • Joystick Piloting
  • Performance Active Trim
  • Integrated Transom System
  • X-Haust Noise Reducer
  • K-Plane Trim Tabs
  • DTS Performance Pedal
Digital Zero Effort Controls
Zero Effort Digital Controls Smooth. Effortless. Instant.
Joystick Piloting
Joystil Piloting Fingertip Control
Performance Active Trim
Performance Active Trim Automated Ease
Integrated Transom System
Alt Run with Attitude
X-Haust Noise Reducer
X-Haust Noise Reducer Quiet Power You’ll Feel
K-Plane Trim Tabs
K-Plane Trim Tabs The Gold Standard
DTS Performance Pedal
DTS Performance Pedal Confidence Underfoot
Oils & Lubricants
  • Racing Lubricants
Racing Lubricants
Racing Lubricants Extreme Protection

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