Stihl FS 94 R Professional Trimmer, 24.1cc EngineStihl FS 94 R Professional Trimmer, 24. 1cc Engine The STIHL FS 94 R trimmer delivers one of the best power to weight ratios in its class, weighing just over 10 pounds great for maneuvering around hills, landscaping stones and other terrain. Its innovative control handle features an ECOSPEED throttle set wheel, allowing you to set the most effective throttle speed for a specific application. Combined with a high powered, low exhaust emission engine