Wood Doctor or FishWe are Getting There
Fish, I will order this tomorrow from either you or the dealer. You picked up very well on the original problem. Without a spur gear oil driver sold with the 3/8" clutch/drum sprocket, the sprocket is worthless. Without a clutch/drum sprocket, the saw becomes worthless. The pitch of the nylon spur gear oil driver must match the clutch drum sprocket, and that pitch must also match the roller nose bar and the chain.
Fish (or anyone else), please let me know who the Stihl dealer is who can supply a spur gear oil driver that matches the clutch drum sprocket. I can take care of the bar and chain that will keep this saw running so that a vintage Stihl 015 in very good condition does not become a boat anchor.
PM if necessary, and TIA.
Do you still monitor these posts? I am in the same boat you were a long time ago. Any suggestions. Thanks, TomF