Thanks for your help...Update--after cleaning the draft tube--still leaking. I believe I've located the screw you are talking about. Basically the bottom of the engine housing where the distributor goes in there is a screw head with a nut around it also. Do you know what the screw does? Yes, I do have the grease cup, which I've cleaned and filled with new grease. I will try posting on the Engine Shop also.
