I have a Husqvarna 41 chainsaw that doesn't idle properly. I have replaced the carburetor, fuel pump and line, spark plug, and air filter. I mixed the 50:1 and put in the new fuel. The chainsaw starts fine. Idles with the choke on, and dies out when I pull the trigger or push the choke in. I have followed video instructions on adjusting the high (H) and low (L) to the correct starting point, all the way in and back a turn and a quarter. No success. With a brand new carburetor, I'm wondering how to idle and operate the chainsaw without having to fine tune it to work.