Hello there, i have a Husqvarna 61 model and have a doubt about the tank vent, i taked off to see if goes air through and dissembled cause almoust nothing going through...It has a white bottom inside, i dont know if its ok that goes so little air or if i have to take off that white plastic inside so more air can go off and descompress the pressure in the tank...The problem i have realy is that i only can start the machine and get it goin if i accelerate, when i stop accelerating the saw go off...