BB I had one a couple of days ago Victa Tornado that my grandson brought around for me to look at from one of his neighbors, pull start was the problem. I had a quick look, nothing wrong with the pull start, did the usual checks, remove the decomp and put in a spark plug, no compression. I said to my grandson I think this has been run on petrol. He rang the bloke and then I get the story that his brother had borrowed it and put 2 tanks of straight petrol through it but as it still turned over they didn't think it was an issue. I haven't pulled the head off it yet, but I guess it will look like your pictured piston. Funny how it was the pull start that was the problem
