I have recovered a Fairbanks Morse 25 HP model Yh that has been sitting in the bush of Northwestern Ontario since 1933. It is a 1923 model with the center head injector. i have it home now and am disassembling it, the cylinder is stuck and it is missing the Madison Kipp oiler but otherwise it looks to be complete. It is apparent that a bush repair was done on this motor without proper tools. The cylinder head nuts have been rounded off with a pipe wrench and a broken ten inch piston ring was found on the forest floor close by along with a copper/asbestos head gasket. My question is, what is the proper head gasket for this engine. When I removed the head it has two paper type gaskets between the head and cylinder and another between the head and the injector housing. Has anyone had experiance with the gaskets on these engines and if so who did they get the replacements from?