There are 2 different G38 hubs..The one that works on the Poulan is the old original one...The original hub was used for about 15 years...It was steel...It threaded onto the end of the crank and also held the flywheel on...A few years ago it was changed to the new style aluminum hub that bolts to the flywheel with 2 6mm allen bolts..The flywheel is held on the crank by an 8mm nut, same thread as the old steel hub...It worked that way for at least 15 years before the update...I have seen many bent ones but have not seen one that broke off..The steel hub bends and the threads on the end of the crank bend, but so far no broken ones...