GF40 40cc 4-Stroke Gas Airplane Engine with Muffler (OSMG0800)

The GF40 40cc four-stroke gasoline engine for model airplanes is designed for aerobatic and scale aircraft, delivering extra torque, a more realistic engine note, and efficient gas operation. It ships with an ignition module that eases starting and automatically adjusts timing to throttle, along with a Walbro carburetor, a muffler, and a spark plug, all built with the high‑quality finish O.S. is known for and backed by a two-year warranty.

Designed to install in the same mounting pattern as the GT33, this engine uses a Positive Crankcase Ventilation (PCV) system to keep the model and environment cleaner by reducing blow-by gas and oil waste. The choke rod guide is integrated with the backplate for easy installation, and the package includes a compact ignition module and Walbro carb to simplify setup and deliver steady starting performance and throttle response for sport, aerobatic, or scale flying.