Screw,​​ 5/​​16-18 X 3/​​4

Took the Auger and impeller out. Had to use some heat on the broken roll pins and then using a punch, knocked the pins out. Put the new roller pins in with no problem. Re-installed the main shaft and used 242 threadlocker on the two nuts holding the shaft near the engine. Re-installed the impeller. Put the Auger in after lining up the gears in the front gearbox. Made sure the end seal for the gearbox was in place. Replaced the one shearpin on the right. Re-filled the crankcase with new oil (previously drained the old oil before starting the job). Pulled the cord twice,fired up, let the engine run for a few minutes. Put it in gear. WORKS FINE!