Let us know what’s been done so far… Was the coil replaced? or the whole mag plate? Were the wires replaced? Do you have equipment to test the condenser? Have you removed the points and condenser and cleaned all contacts? Have you gapped the points so they start to open when the mark of the flywheel passes the mark on the mag plate?
Also, on another issue with this motor, does it have the exhaust relief lever? If so, which side of the tiller support bar is it located?
Tom