Hi. I,m afraid there's not much going on here right now, must be the time of year. All I can say on your problem, is that I,ve heard of others with the same problem, one of them took their saw back to Screwfix 4 times and got it changed, in the end he had to get a refund, swearing to never buy another Ryobi. I can only suggest you do the same, hopefully still under guaratee. If not a new saw, I would treat the same as an electric powertool, and trust repairs to a Ryobi dealer. It does sound a bit like fuel starvation, but not a good idea to attempt working on a 2 stroke that small. Hope to be able to help you more on another subject sometime.