A Massey Harris 33 (I had first thought 44) that sat without a motor for many years. Pulled out of the woods and cleaned up and repowered with 13 hp Powerfist air cooled engine. A centrifugal clutch was used for many reasons. This tractor has lots more power than we thought it would have considering it was originally about 50 hp. Plus it steers very tightly. Note that the photos have no sound.