Husqvarna 18" 22cc 2 Cycle Gas Powered Dual Hedge/ Clipper Saw Trimmer | 122HD45 Husqvarna 122HD45 18" 21.7cc Gas Powered Dual Blade Hedge Trimmer Low noise engine Smart Start - The engine and starter have been designed so the machine starts quickly with minimum effort. Auto return stop switch - Stop switch automatically resets to the ON position for easier starting. Air Purge - Removes air from carburetor and fuel system for easy starting.