Geared Right:
The ultra-robust 5.44-inch-diameter gearcase is built for offshore seas and provides extra lift for longer, heavier center consoles and walkarounds.
Fuel Savings:
The MercMonitor ECO-Screen constantly notes engine trim, speed and fuel consumption and offers easy-to-read prompts designed to help you run your boat at optimal fuel economy.
World-Class Design:
Our long-bolt design anchors the block and cylinder head to the bedplate and eliminates the effects of expansion and contraction. An exclusive oil cooler maintains optimal oil temperature to extend the life of the engine.

In addition, the Verado valve train is maintenance-free for the life of the engine
Joystick Piloting for Outboards:
With a simple push or twist of a joystick it’s possible to maneuver a boat in virtually any direction – sideways, diagonally or spinning the boat on its axis.

Control dual, triple or quad Verado 250hp, 300hp or 350hp outboards, even in challenging wind and current conditions. This system integrates seamlessly with SmartCraft® Digital Throttle & Shift (DTS) and electro-hydraulic power steering, while standard integrated autopilot provides Auto Heading and Waypoint Sequencing.

Also available with Skyhook®, a digital GPS positioning system which can hold a boat in position while fishing or waiting for bridges to open.
Smoothest, quietest:
The inherently balanced in-line six-cylinder engine and our Advanced Mid Section (AMS) with perimeter mounts virtually eliminate vibration in the boat. Perfect for sneaking up on fish or cruising on luxury pontoons.
Driving Experience:
SmartCraft® Digital Throttle & Shift provides smooth, instantaneous, predictable and quiet shifting, as well as ultra-responsive throttle control, while true Power Steering (standard on six-cylinder models) delivers precision steering without undesirable steering torque.

Mercury “shadow technology” eliminates the hassle of grappling with multiple engine levers when running with triple or quadruple outboards. Shadow mode controls up to four engines with just two levers from as many as two helm stations.
White, Black, Your Choice:
In addition to standard Phantom Black, Mercury now offers 300hp and 350hp Verado outboards in two shades of white – Cold Fusion and Warm Fusion. The two new shades of Mercury White will complement almost any boat design or style.
Power:
The instant boost of an intercooled supercharged system delivers tremendous hole shot, unrivaled mid-range punch and excellent top speed.

Technical specifications: 

HP / kW   :300 / 221
Engine type  : Inline 6
Displacement (L)  : 2.6
Full throttle RPM  : 5800-6400
Air induction: Supercharged with charge air cooling and electronic boost pressure control
Fuel induction system  : Sequential multi-port electronic fuel injection (EFI)
Alternator amp / Watt   :70 amp / 882 watt (Belt-Driven)
Recommended fuel  : Unleaded 95RON minimum (90RON compatible)
Recommended oil   :Mercury FourStroke 25W40 Marine Oil
Engine protection operator warning system  : SmartCraft Engine Guardian
Compatible with SmartCraft digital technology  : Yes
Starting  : Smart Start Electric
Controls  : SmartCraft Digital
Steering: Electro-hydraulic power steering
Shaft length: 20″ / 508 mm
25″ / 635 mm
30″ / 762 mm
Gearcase ratio: 1.75  :1 or 1.85:1
Dry weight *Lightest model available  : 288 kg
CARB star rating  : 2
Gearcase options  : 5.44″
Counter rotation  : Available
Color : Cold Fusion White
Phantom Black  :Warm Fusion White