Ariens Deluxe 28 SHO (28) 306cc Two-Stage Snow Blower ARN921048Ariens Deluxe 28 SHO (28) 306cc Two-Stage Snow Blower [ARN][921048]. Powerful 306cc Ariens AX306 Engine. Designed to function in sub-zero conditions. 120-volt electric start w/recoil (cord not included). Super High-Output Impeller (SHO). Faster impeller speeds by way of modified belts and pulleys. Improved output and.