USED STIHL 066 Chainsaw For Sale! Fitz's Walker Power at 1107 Goldstream Ave Engine displacement: 63.3cc. Power output: 4.4 horsepower. Fuel capacity: 20.6 fluid ounces. Oil capacity: 14.5 fluid ounces. Bar length: 18 inches, 20 inches, 24 inches. Chain pitch: 3/8 inch. Chain gauge: 0.050 inch. Weight: 11.9 pounds (without bar and chain)