The New Benchmark in Outboard Performance

The new Mercury Racing V8 500R elevates outboard engine power and technology. This supercharged, 500hp V8 500R introduces a host of new components engineered to meet the challenging demands of extreme-performance boating.

The new V8 500R delivers 50 more horsepower plus 10 percent more torque than the 450R model in the Mercury Racing outboard line. Weighing as little as 720 pounds, the new V8 500R establishes a new benchmark for outboard power density. Its 4.6-liter 64-degree V8 FourStroke powerhead is boosted by an exclusive Mercury Racing supercharger. The engine is designed to perform on pump fuel with a minimum 89-octane (95 RON) rating.

Mercury Racing created a number of new and exclusive components and features to optimize the performance potential of the powerful V8 500R, including the R-Drive and R-Drive Sport gearcases, the Advanced Racing Core (ARC) midsection, and upgraded engine and cooling system designs. The Mercury Racing V8 500R will be available in four lengths – 20", 25", 30" and 35" – to accommodate any single or multi-engine performance application. The 26-inch center-to-center mounting distance on multi-engine transoms enables seamless installations on new boats and repower applications.

Stout Powerhead

The 4.6-liter V8 powerhead has been upgraded with a number of new components intended to support the scaled-up power output. A stout new crankshaft specific to the V8 500R model rides in 230-degree groove main bearings for improved oiling and features larger, more robust 1-inch driveshaft splines. Connecting rods, rod bearings and pistons are strengthened to handle increased combustion pressure and a higher 6600 RPM redline. A new low-inertia flywheel allows the engine RPM to climb faster for improved acceleration.

Supercharger boost pressure is increased by 26 percent compared to the Mercury Racing 450R model. To accommodate increased airflow demand, the 500R features a new attenuator with a larger intake. Throttle body diameter is increased by 15 percent from 80mm to 92mm, and the shape of the supercharger inlet is redesigned to improve flow. The charge air cooler fin density and flow pattern are optimized to improve efficiency.

Humidity Compensation Technology

To promote consistent performance in a broad range of atmospheric conditions the V8 500R outboard is equipped with a new sensor located in the intake attenuator to measure the humidity level of the incoming air. This allows the engine ECM to combine reported humidity with air pressure and air temperature data to determine the ideal spark timing for prevailing conditions to maintain the most aggressive calibration possible to optimize performance under virtually all conditions. Boaters will notice a significant gain in power in challenging, very humid conditions – up to 30 additional horsepower than would be available without humidity compensation.

Technology Solutions

The V8 500R model features Mercury Racing technology solutions designed to enhance the boating experience, including the precision of Digital Throttle and Shift (DTS) with available Mercury Racing Digital Zero Effort controls. Adaptive Speed Control maintains engine RPM as load changes due to sea conditions or turning maneuvers to maintain boat authority with less control input. The V8 500R model supports all Mercury SmartCraft technologies, including the Engine Guardian monitor system and VesselView multi-function displays. The industry-exclusive Top Cowl Service Door eases routine maintenance by providing easy access to the oil dipstick and fill without removing the cowl.

Color Options

Three color options are offered for the Mercury Racing V8 500R model: Phantom Black or Cold Fusion White are finished with Mercury Racing graphics and Devil Red Eye trim. For boaters planning a custom paint application, the V8 500R is also available “ready for paint” in Phantom Black with no applied graphics or trim panel. Graphics and an application mask are included for installation after custom painting.

The Mercury Racing 500R is covered by a three-year limited factory warranty with up to five additional years of Mercury Product Protection extended factory warranty available. Learn about the Mercury Racing Wide Open lifestyle and all Mercury Racing high-performance products at Mercuryracing.com.

Learn more: Mercury Racing R-Drive and R-Drive Sport gearcase designed for extreme power and speed.