The O.S. GT15 engine might be the smallest gas engine in the O.S. line-up but don’t you worry about a thing. This “little” gasser delivers! With a Power Box muffler included, the GT15 features the PD-08 pump for consistent fuel dispersement anytime – anyplace. And this baby gives pilots the power of a .90 4-stroke or a .60 2-stroke with the fuel economy of gas – all while mounting in the same space as a .65 AX 2-stroke glow engine. What more could you ask for? Why not click the vid-link to find out exactly what more you will get: