O.S. Engines is a Japanese model engine manufacturer. The company was founded in 1936 by machinist Shigeo Ogawa for the production of model steam engines. At the suggestion of American buyer Paul Houghton, Ogawa tooled up for his first gasoline-powered engine, the 1.6 cc O.S. Type-1 of which 200 units were produced and exported under the brand name "Pixie." Other O.S. engines in current production include the .18 TM, .18 TZ, .25 FX and .46 AX. O.S. also makes required accessories for their engines including glow plugs, exhausts and air filters.