I own a 2002 model Victa Super 2 160cc with black plastic carb and it goes fine but on start up and when I shut it down or get it running real slow there is this strange metal clunking noise comeing from the engine (I think) It almost sounds like the bottom plate is wobbling around or the blades are hitting something but its all tight. I was wondering if it was something to do with the timing? Maybe it needs to be retarded? What do u think.

Steve