The 300R is part of the Mercury Racing V8 FourStroke outboard lineup, designed to be high-winding, rugged and reliable. It's loaded with advanced design elements and Mercury Racing technology to go quicker, faster and farther than previously imagined.
A short-runner intake manifold and high-lift intake camshaft designed specifically for the 300R combine to produce quick acceleration.
The durable Mercury Racing tri-ram midsection for 20-inch models features solid lower engine mounts and a high-durometer upper mount for enhanced stability and handling at high speeds. The 300R HD model, designed for high-performance offshore and multi-engine applications, is equipped with a heavy-duty midsection with solid mounts, forged transom brackets, and a robust single-ram trim system with a remote trim pump.
To maximize top speed and propping options the wide-open throttle (WOT) operating range is extended to 5800-6400 rpm.
An integrated rear tie-bar mounting plate and optional side-steering kits are available for select 300R HD models fitted with the Sport Master gearcase.
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 300R 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.
FULL THROTTLE RPM
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