Can’t speak for others but I find all pictures interesting and often of value. Yours seem to show a motor that hasn’t been stored well. Makes for a real challenge. The lack of carbon in the exhaust port may indicate low running hours. A real shame if that is the case. I’m envious of your ability to keeping the drill bit centered. Way above my skill level. Tubs.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.