When it comes to gasoline aircraft engines, the GT-33 is in a class of its own. It has the muscle to swing larger props, and it stands out for many other reasons, too. The GT-33 offers incredibly fast throttle response, with 10% more power than comparable engines, and it starts easily with electronic ignition that accepts many battery types. Once again O.S. has produced a gas powerhouse for the serious pilot!
Learn more about the O.S. GT-33 Gasoline Engine by visiting its product page at
OSMG1533
Displacement: 2.013 cu in (32.98 cc)
Bore: 1.417 in (35.99 mm)
Stroke: 1.276 in (32.41 mm)
RPM range: 1,800-8,000
Total Weight: 43.39 oz (1230 g)
Includes: E-5030 muffler, ignition module, CM-6 spark plug
Join O.S. on Facebook! Go to to interact with O.S. product experts and modelers like you.