I just purchased an old Scag Cub with intentions of rebuilding the Kawasaki engine. It has a replaceable bushing in the crankcase that definitely needs replaced. I have read all forums concerning this particular engine and bushing numbers for replacement is not easily found. I read where bushing # 92139-7009 was a fit. I ordered it only to find it looked nothing like the original bushing. There is an oil galley (?) groove around the inside diameter of the original bushing and no groove at all in the new (92139-7009) bushing. Obviously, my question is - Is there suppose to be some sort of oil groove, holes, or something to let oil around between shaft and bushing ? Or do you know that I may have the correct bushing and it will lube OK ? Thanks ...