The Merry Tiller is a remarkably simple machine, which accounts for its popularity. It has a basic two-rail angle-iron frame that the motor attaches to with four bolts. The transmission is an enclosed chain-drive with a very narrow profile, which is one of the secrets of this tiller’s performance. Other tillers have a geared axle, which results in a much broader transmission enclosure and limits the depth at which the tiller can dig. The narrow Merry design allows the tiller to bury its tines, tilling to a full 12-inch soil depth.