O.S. reliability and output - now in a .21-sized outboard

The .21 XM represents a first from O.S. - a high performance outboard power plant, with features that the serious boat racer will appreciate. Some of its incredible features include Schnuerle porting, multiple bearings and a lubrication system for the flex shaft bearings for greater performance and increased longevity.

• The engine's height and angle are adjustable to further optimize performance
• Comes with a detachable muffler, for easier installation of tuned pipes
• Also includes a high performance Type 20J carburetor, water pickup, flexible drive shaft and a high performance ready to race right out of the box