Bomag’s BT60/4 and BT65/4 tampers offer the operating convenience of a four-cycle engine while maintaining the high stroke and impact force of a two-cycle model. In addition, the tampers can be transported in a horizontal position without concern for oil contamination of the cylinder, muffler, carburetor or air filter. The BT60/4 weighs 137 pounds and delivers up to 3,035 pounds of impact force with a maximum compaction depth of 22 inches. The BT65/4 weighs 150 pounds and delivers up to 3,642 pounds of impact force with a maximum compaction depth of 26 inches. The maximum travel speed of both models is 66 feet per minute, and they produce 600 to 708 impacts per minute. www.bomag.com/usa/index.aspx?&Lang=478