Hi. I am new here. And thanks to this forum I am learning to deal with my brushcutter lusqtoff 52cc (the karma of my life). I'm tired of being scammed every time I send her to fix (for being ignorant in the matter). But thanks to this forum and my various bad experiences I definitely want to learn how to repair it myself. I hope to contribute and help: Hello Friend. 1. First of all to the cylinder you have to press it and release it (without squeezing it too hard so that it does not break) 5 to 10 times to raise the fuel before starting it. If you have a lot of gasoline left on your finger, it may be that the cylinder is broken or punctured and sucks air. You have to change it. 2.Fix also to the rubber stopper (button-shaped where the two hoses enter the fuel tank) that is not broken or dilated at the edges or in any of the 2 x holes where each hose passes (which would air leak and gasoline / mixture). If so, change it. It is pulled out as a plug but carefully because the edges are sensitive (I already broke one x that I tell you). And to put on the new one, I recommend you put the sleeves first and then insert the cap into the fuel tank. But when you want to place the sleeves then you can get to expand either of the two holes. 3. Lastly, check that the sleeves are well inserted in each of the carburetor spikes and that none of the sleeves are broken or punctured. (uff I get tired more writing than cutting weeds) 4.EXITS.