Hi all, first time poster. I have a Ryobi trimmer plus with the curved shaft. Several years old. The only model number I see is 725R, 31CC. Looked on the Ryobi site but no help there. I am a mechanic by trade but no experience on these engines. Trimmer started off with wanting to die out when pulling the throttle trigger. Not always, a couple of times then it would clear itself. Now when I start it, it's like it just burns the fuel from priming then dies. Prime it again and starts back up, then dies. I've taken the carb apart and all looks as it should. Seems to run fine as long as it has fuel. Fuel starvation seems to be the problem but the lines appear to be clear and fuel runs out of them when disconnected. Any help appreciated.