ID # 27680713

Mercury - FourStroke 225hp

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FourStroke 175 - 300hp

 3.4L V6 and 4.6L V8

Reliability, flexibility, power and efficiency – all within your reach. Backed by decades of marine power innovation and product leadership, Mercury V8 and V6 FourStroke outboards deliver legendary performance and forward-thinking technology. FourStroke outboards are built for any body of water and a wide variety of boats.


Sale Type
Electric Start with SmartStart Protection
Big Tiller (optional) Hydraulic (optional) Hydraulic (standard) Joystick Piloting for Outboards Power (optional)
Engine Type
Trim System
Power trim and tilt
Shaft Length
20" / 508 mm 25" / 635 mm 30" / 762 mm
Gearcase Ratio
Displacement (L)
Full Throttle RPM
Alternator Amp / Watt
85-amp (1071 Watt) with Idle Charge
Displacement (CID/CC)
209 CID
Cylinder Configuration
V-6 [64 degree] with Dual Overhead Cam [DOHC] and 24-valves
Dry Weight *Lightest Model Available
475 lbs / 216 kgs

Adaptive Speed Control

Adaptive Speed Control maintains a desired rpm regardless of changes in load or conditions without adjustments to the throttle lever position – a first for the outboard industry.

Smooth and Quiet

The V8 and V6 FourStroke engines are quieter and smoother than the leading competitor.

Easy to Maintain

The exclusive Top Cowl Service Door simplifies routine maintenance, letting you check or add engine oil without removing the top cowl. An hour-based maintenance schedule decal is located under the cowl, providing a quick overview of routine maintenance.

Industry-Exclusive Battery Management Technology

When battery voltage is low, engines will automatically increase idle rpm to boost alternator output and charge batteries to the proper level, protecting batteries from draining while trolling and operating electronic devices.

Ample Charging Output

FourStroke models feature a robust alternator that delivers 20 amps net of charging power at idle and 30 amps total at wide-open throttle.


Quick Acceleration

The high-displacement, quad-cam design of the V8 and V6 FourStroke powerheads generates plenty of torque, especially at mid-range.

Superior Fuel Economy

Advanced Range Optimization improves cruise-speed fuel efficiency by automatically adjusting fuel delivery so seamlessly the operator won’t feel or hear it.

Light and Compact

Mercury V8 and V6 FourStroke outboards are the lightest in their respective class by at least 10 pounds and mount on 26-inch centers for broader fitment.


fourstroke advantage

Go Farther:

Advanced Range Optimization by Mercury Marine uses closed-loop fuel control to precisely adjust the fuel mixture and deliver the best possible efficiency.

Lighter by Design:

Ounce by ounce, Mercury engineers cut pounds from the FourStroke outboards, ensuring each engine is the lightest in its respective class.

Keep It Steady:

Adaptive Speed Control maintains engine speed (rpm) regardless of load or condition changes – such as rough water, tight turns, tow sports and lower speeds on plane – without having to frequently adjust throttle position, a first for the outboard industry.

Smart Charging:

Idle Charge battery-management prevents boaters from draining their batteries while operating multiple electronic devices. When battery voltage is reduced, the engine will automatically increase idle rpm to boost alternator output and recharge low batteries to the proper level.


SmartCraft. Boating with a Higher IQ.

SmartCraft® is a full suite of digital technologies, fully integrated and totally coordinated. Gauges, sensors, vessel systems, computer-controlled features – one total package, one high level of control. Make your boating experience easier, safer and a lot more enjoyable. 

Joystick Piloting Mercury FourStroke 225hp

300hp SeaPro AMS outboards are compatible with Joystick Piloting for Outboards. Joystick Piloting is designed and personalized for vessels powered by two to six SeaPro outboards. Mercury Joystick Piloting was the industry’s first joystick system for outboards and remains the best-selling marine joystick system.

VesselView Mobile Mercury FourStroke 225hp

VesselView Mobile allows boaters to use a mobile device (smartphone or tablet) to connect with their Mercury outboard or sterndrive engine(s). The plug-and-play module connects via Bluetooth, providing quick, convenient access to your engine’s data.

VesselView Mobile is compatible with all SmartCraft-capable Mercury outboards (2004 and newer, 40hp and above).

Active Trim Mercury FourStroke 225hp

Active Trim makes boating easier and more enjoyable by automatically trimming outboard engines. Active Trim simplifies boat operation while improving engine performance and decreasing fuel costs.
Active Trim is compatible with all current SmartCraft-capable Mercury outboards (40hp and above).


VesselView Link Mercury FourStroke 225hp

VesselView Link integrates an existing multi-function display with Mercury engine(s) to place information and control at the driver’s fingertips. Its user interface is easy to navigate, and it integrates chart-plotter, sonar, radar and more into one display.

VesselView Link is compatible with all SmartCraft-capable Mercury outboards (2004 and newer, 40hp and above).

Big Tiller Mercury FourStroke 225hp

Big Tiller offers optimal control for 175 - 300hp FourStroke outboards. It incorporates a convenient power trim switch, close-at-hand shift lever and an optional digital troll control that adjusts engine speed in 10-rpm increments.
Big Tiller is available on 150 - 300hp FourStroke outboards.


Name Link
175-300hp FourStroke Brochure Download
Mercury Brand Brochure Download
Mercury SmartCraft Brochure Download