First let me say I have no luck at all with 2-strokes. I have some serious weed eating that needs done and the Poulon Pro hasn't let me down till now. The pump bubble split so I went and picked up a kit that has the right size bubble, but not the small fuel line. Because of this I also picked up a new Murray whacker because of my first comment. I changed the bubble and it only runs on full choke. I removed the carb and looked for any adjustments, found 2 that could be, but I have nothing to turn them. I can finish the weed whacking on full choke, but if I can't get the Poulon running like it should I will need to un-box the Murray.