025 Oil Pump Drive

[Kenskip1]

I hope that someone can help me with this. I was given a 025. It was traded in for a new saw. This thing was badly neglected and beaten. The bc are gone, as well as the clutch drum. The engine runs well. With the clutch drum missing, I pulled the clutch off.Their is a brass collar that goes around the crank.This collas has a spring with an "S" hook on the top.On the end of this is a nylon gear that turns the oil pump.What is bothering me is what turnes this spring that drives the oil pump? I suspect that this would be a slot on the clutch drum. But like I mentiond the drum is AWOL
I would like to put a 14 inch 325 bc on this. Just what I need, Another Stihl sitting underneath my bench!Thanks, Ken

 

[sugarbush]

I hope that someone can help me with this. I was given a 025. It was traded in for a new saw. This thing was badly neglected and beaten. The bc are gone, as well as the clutch drum. The engine runs well. With the clutch drum missing, I pulled the clutch off.Their is a brass collar that goes around the crank.This collas has a spring with an "S" hook on the top.On the end of this is a nylon gear that turns the oil pump.What is bothering me is what turnes this spring that drives the oil pump? I suspect that this would be a slot on the clutch drum. But like I mentiond the drum is AWOL
I would like to put a 14 inch 325 bc on this. Just what I need, Another Stihl sitting underneath my bench!Thanks, Ken

Yes, notch in drum.