briggs & stratton snow engine 14.5 tp 305cc es 3/4" x 2-33/64" #20m307-0001 briggs & stratton briggs snow engine 14.5 torque power, 305cc 3/4" x 2-33/64" shaft, tapped 3/8" with 3/16" keyway. electric start with recoil backup 2 year consumer/ 90 day commercial warranty. model 20m307-0001