This internal combustion concrete troweling machine is used to trowel and polish the surface of concrete. A unique decreasing vibration handle makes the operator's control feel comfortable with reduce fatigue. The centrifugal clutch allows for an easy start-up without loading. And it can adjust automatically, which reduces the repair and maintenance. The pitch features a large control area. The low gravity design and completely sealed belt protects the device. The model PP915 features 5.5 hp power, weighs 50kg, and has a 36-in. working width.