I just replaced the clutch drum/sprocket on my McCulloch 160. Now, before I took the old one off I noticed it had some side to side play in it on the crankshaft. I didn't think this was normal and added a second thin washer under the drum which took most of the play out. Now I'm not so sure, I'm thinking this play may be required to keep the side of the sprocket from rubbing the side of the crankcase where the shaft comes out. The play I am referring to is left to right. Any advice?