Echo CS-4510-18 Chainsaw with 18 Inch Bar and ChainDescription: A simply reliable cutting machine. Whether the work calls for seemingly endless storm cleanup or bucking loads of firewood, the CS 4510 delivers power and performance for the long haul. Features: 45. 0 cc professional grade, 2 stroke engine Spring assist starter reduces starting effort Heavy duty air filter with tool less access provides superior air filtration Specifications: Engine Displacement (cc): 45 Engine Displacement (cu in): 2.