Just a little note, I cannot find any markings on the cowling or anywhere on the engine to tell you the truth.
This morning I removed the head and the gasket and gave the block, valve heads, cylinder and top of the piston a good clean and lube. I also cleaned the spark plug up and it started straight away. There's a little bit of play in the piston which i think is causing a little loss in compression so I don't know how it'll go with actually mowing lawn. I'm still undecided on whether or not to just do a whole engine replacement or run this one with some thick oil for the time being.
