Welcome to Outdoorking. The procedure for setting Kirby Lauson ignition timing correctly, which is quite awkward, is described in detail in this thread:
https://www.outdoorking-forum.com.au/forum/u...=7230&Words=timing&Search=true#Post37761

Refer specifically to Post # 37757. While you are there you might like to read the whole thread. Mr. Bonnar did an exemplary job of documenting a full overhaul of the engine, including sourcing of replacement components, and their prices.