The GeoRipper 720 is the world's first 4-stroke landscape trencher that digs up to 20" deep. Using a 4-stroke minitrencher provides reassurance, because it is a simplified operation with no more engine failure due to improper fuel mixture. For easier starts, the automatic engine decompression valve is engineered into the cam gear to reduce pull-start force by 40%. The GeoRipper 720 also has lower noise at 92.7dB(A), smoother idle for continuous operation, and lower fuel consumption at only .45 gallons per hour. Additional advantages include a three-ring piston engineered for improved commercial engine durability, and reduced exhaust and intake carbon build-up for longer cylinder life. In addition, GeoRipper 720 has a five-stage foam-paper-nylon filtration system with Advance Direction Air Flow to provide cleaner air for improved engine durability. The power and performance features of GeoRipper 720 make it a best-in-class handheld trenching tool. Ideal for landscapers, irrigation professionals, electricians and plumbers.