Skip to main content
r-drive

Gearcase

R-Drive &
R-Drive Sport

MERCURY RACING R-DRIVE

The new level of outboard power demands all-new gear case options. Introducing the exclusive Mercury Racing R-Drive, available in R-Drive and R-Drive Sport versions, this high-performance gear case is designed specifically for the speed and power of the 500R outboard in submerged, semi-surfacing and full surfacing applications.

The Shape of speed

A crescent leading edge and long aspect 5.9-inch torpedo are hydrodynamically tuned for high speeds in any application. Equipped with 1.60:1 gear ratio and designed to turn propellers up to 17 inches in diameter.

Reduced Drag

A new intermediate spray plate reduces drag in submerged and transition applications.

Optimize Flow

Low water pickups plus a new adjustable nose cap inlet system optimize water flow for submerged, transition and high-speed surfacing applications.

Pump up

To support a generous flow of cooling water to the powerhead water pump capacity is increased by 57 percent.

Stronger Inside

A rugged new 1-inch diameter driveshaft and 1.5-inch diameter propshaft are designed to handle the torque and thrust of 500 horsepower.

1/ 5
Shape of speed
500R Spray Plate
Optimize Flow
Water Pump
Stronger inside

R-Drive

The R-Drive gearcase features a standard skeg length with a very efficient parabolic cross-section shape with left- or right-hand camber to balance steering force with standard and counter rotation props. Designed to perform in submerged and transition applications on boats capable of speeds between 85 and 100mph.

R Drive
R Drive Sport

R-Drive Sport

The R-Drive Sport is optimized for surfacing applications at speeds beyond 100 mph. Its longer skeg maintains steering control while operating fully surfaced at the high mounting positions desirable for many of the fastest hulls.

1/

R-Drive Sport

Wedge Skeg

The skeg features a wedge shape from leading edge to trailing edge and is available with no camber or with a right-hand camber for single-engine boats.

R-Drive Sport

Wedge Skeg

The skeg features a wedge shape from leading edge to trailing edge and is available with no camber or with a right-hand camber for single-engine boats.

1/ 2
500 Wedge
Wedge Skeg
500r

Performance Elevated

The Mercury Racing V8 500R produces unrelenting thrust that establishes a new standard for all-out performance.

Discover