Hi All,

I hope there might be an OS58 owner out there! I've just acquired one of these second hand and need help getting it apart for cleaning. I have the head and backplate off, also the cylinder liner is out. I cannot however, get the piston/rod assy out of the case.

The case is two piece with the lower case being a casting and the finned barrel being turned. How is the barrel fitted to the lower case? Pressed in or threaded? I am pretty sure they must be able to be separated from each other as otherwise, there's no way the rod/piston assy can be removed?

Can anyone help?

While I'm at it, does anyone have an old "Jetstream" type muffler they'd be prepared to part with?

Thanks in advance to all,

DerFly

http://www.osengines.com/history/osm...5-max-58rc.jpg