the motor is a 11hp briggs and stratton. We shaved the head( or tried to). We made ourself a pull start with an old pulley. Yes the air filter cover does shake but it wasnt bolted on there the best in the world at the time but this was just a test run to see how the pipe would sound. www.myspace.com/bigpeoplefilms Теги:CustomLawnMowerStack11hp11hpbriggsandstrattonCraftsmanpipe