if you want to buy OEM gaskets then find an echo dealer and get parts for model "SRM-2100"

and as long as you're doing a rebuild you can cut the rear crank stub off right at the bearing and plug the oil seal hole in the case. this will save some weight and reduce friction. the bottom of those aluminium asthma inhaler cartridges are a perfect 22mm. just cut a 1/4" off, smear it with locktite and drive it into place with a large socket. some of the big electrolytic caps also have a case of the right size.


dave