DISPLACEMENT: 59.0 cc (3.6 cu. in.) ENGINE POWER: 3.1 kW (4.2 bhp) POWERHEAD WEIGHT: 6.2 kg (13.67 Ibs.) FUEL CAPACITY: 600 cc (20.3 oz.) CHAIN OIL CAPACITY: 350 cc (11.8 oz.) OILOMATIC® CHAIN: 3/8″ RS3 GUIDE BAR LENGTHS (Recommended ranges): 40 to 50 cm (16″ to 20″) STIHL ROLLOMATIC® POWER SOURCE: Gas