Chainsaw Repair

Sure enough I found it by generic size in my regular CR book but not by the Poulan number in the interchange book ,strange indeed ..563 shaft ,.813 bore ,.188 width ,type/style HMSA1 ,double lip ,lip code r ,nitrile .

Some times that interchange book works and some time it does not .

I've got a bunch of seal and bearing books but as of yet have never found a good online cross reference without e-mailing one of 6 zillion seal and bearing houses .--thanks for the info --