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OS .21 XM Outboard

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
Displacement 0.211 (3.46 cc)
Bore 0.654 in (16.6 mm)
Stroke 0.630 in (16.0 mm)
RPM 3000 - 25000


1.3 BHP @ 25000 RPM
Weight 23.6 oz (670 g)
Price R Not Available