STIHL MS 661 C-M
| DISPLACEMENT | 91.1 cc (5.56 cu. in.) |
| ENGINE POWER | 5.4 kW (7.2 bhp) |
| POWERHEAD WEIGHT | Flush-Cut: 7.4kg (16.3 lbs.) Wrap-Handle: 7.66 kg (16.8 lbs.) |
| FUEL CAPACITY | 825 cc (27.9 oz.) |
| CHAIN OIL CAPACITY | 360 cc (12.2 oz.) |
| OILOMATIC® CHAIN | 33 RS3 |
| GUIDE BAR LENGTHS (Recommended ranges) | 40 to 80 cm (16" to 32") STIHL ROLLOMATIC® E Super |
| POWER SOURCE | Gas |