Troy-Bilt 45in Electric-Start Polar Blast 4510 Snow Thrower 420cc 4-Cycle EngineTroy-Bilt 45in Electric-Start Polar Blast 4510 Snow Thrower 420cc 4-Cycle Engine. Northern Tool Item# 44797. 468.00 lb(s). 24 months parts / 24 months labor. With Touch’n Turn power steering, simply squeeze the trigger on the side you want to turn toward and the self-propelled.