OS GF 30 1433
It's a four stroke. It's a petrol with all the cleanliness and economy that comes with it and it's an OS. Not a lot to dislike here! Ideal replacement for 120-150 FS Glow or 20cc petrol
OS GF 40 1420
The O.S. GF 40 combines the ease of use and economy of the traditional 4-stroke engine with a gasoline engine. The fast and powerful response is ideal for scale sport and aerobatic models.