Mercury Racing 300R FourStroke 4.6L V-8 Outboard

Mercury Racing 300R FourStroke 4.6L V-8 Outboard Engines

The 300R FourStroke is the highest performing engine in its class. The all New Mercury Marine 300R FourStrokes are the highest performing engines in their class.

UNMATCHED SPEED, ACCELERATION & EFFICIENCY

The naturally aspirated 4.6L V-8  provides an astounding 44% in increased displacement and up to 40% higher overall bottom end torque than the legacy two-stroke 300XS it replaces.  The custom Racing intake cam profiles and short intake manifold runners maximize power throughout the rated speed range. 

An integrated oil cooler keeps oil temps down throughout the Mercury Racing exclusive 5800-6400 rpm operating range. Transient spark calibration boosts torque by 7% for unmatched acceleration. Advanced Range Optimization automatically adjusts fuel delivery for up to 10% improvement in cruise-speed fuel efficiency. All of this on 87-octane (90 RON) pump gas while maintaining a comparable weight as it’s legacy two-stroke cousin.

Best of all, the 300R is backed by a three-year factory warranty. Extra coverage available. Use the Contact Us tab for more info!