Posts Tagged Pro XS 175


Building a Batch of Champions

Mike Hammer (background) rolls a batch of OptiMax 200XS powerheads to the dyno. Powerheads are broke-in and race ready when they leave our facility.

Gary Aman mounts a Sport Master gearcase to a 200XS ROS mid section.

Outboards. Outboards. Outboards everywhere! Mercury Racing’s factory floor is a buzz of activity. We’re busy with a large build of low-emissions 2-stroke OptiMax 200XS SST (Super Stock Tunnel) and ROS (Race Offshore) outboards. A majority of the direct-fuel injected engines are headed to Europe for race venues in Sweden, Italy and France.

Complete engines and conversion kits are being built. The conversion kits, which include a powerhead, tuner, cowlings and gearcase, are a one-time offer for the 2011 season. The SST and ROS kits are available to racers who want to upgrade from older, naturally aspirated, 2.0 liter SST 120 and XR2 Race Offshore engines.

OptiMax 200XS ROS race outboard.

OptiMax 200XS SST race outboard.

Both SST and ROS end models feature a 2.5 Liter V-6 OptiMax powerhead which combines components from the OptiMax 2.5XS and the  Mercury Racing engineered 175 Pro XS outboard.

The 200XS SST features a 12-inch race mid section and a unique IV SSM gearcase which switches the right-hand engine rotation to a left-hand propeller shaft rotation. This is required for the hard, left-hand turns of tunnel boat race courses.

The 200XS ROS features a 15-inch mid section and a 1.75:1 Sport Master gearcase. Models are available in both right-hand and left-hand rotation for multiple engine applications. Read the rest of this entry »