Hi, my brushcutter. Gamma 52cc loses strength when I use it and ends up turning off. It is a fault that I already had, I took it to the service and they changed me (carburetor, spark plug and I don't know what else) that they told me, I used it again and in only 2 tanks of use I returned with the same fault. My question is what really happens? how to solve, because they charged me half of what is worth new .. thanks