Hello, that sounds like an odd knock....\n\nEase the throttle off and there's the hint of a misfire. Strange.\n\nGive it full welly, and yes, there's definitely an odd sound there.\n\nFive seconds later there's a God-almighty *BANG!* and the thing stops\ndead. Using the starter only produces a horrible rattle. Oooh dear,\nmuvver.\n\nI quickly remove the nearest engine cover, and a piece of alloy\ncrankcase falls onto my foot. There's a hole in the cases you could\nstick a child's fist through. It's thrown a rod. The engine is\ncompletely totalled.\n\nFuck. That's me down to B&Q to buy a new lawnmower, then.\n\n(Didn't run it out of oil, either. No idea what happened, but it's the\nmost comprehensively blown-up mower I've ever seen).