If you're talking about the Maloney 125, I have one, it turns a 15x8 at around 7,200. It is fairly heavy and needs to be started with a starter unless you put an electronic ignition on it, which I did. It will however run a really long time on a 16 oz tank. They also made a 100 which was one cubic inch and the 125 is one and a quarter cubic inch disp.