My neighbor brought over his late father in laws' model 12, I think it is from memory, which had been sitting for several years since my neighbor used to mow his block of land down in Gippsland. When I went to turn it over it was siezed, and when I said to him that it was unusual for 2 strokes to sieze like that. His reply that "it was a 4 stroke, they didn't make 2 strokes back then" confirmed immediately what my suspicions were. Haven't pulled it to bits yet