That Kirby-Lauson HK25 or HK30 is not my favourite engine, but if it doesn't need parts, at least it's durable. The only part that looks badly rusted and is difficult to replace, is the chain cover, and I can't tell how deep the rust is. I notice the reel hasn't been resharpened much, if at all, so there is plenty of meat left. The catcher looks good, which is a rarity.
Let's see what the serious SB people say, but I'd say as a full restoration, it looks easier than some that members here take on and succeed with. On the other hand it would be just about as hard to do a basic tidy-up as a restoration, so it is probably all or nothing,.
