Hi Yugeun
Thanks for contacting the Answer Army to post your questions.
You are trying to run the machine with the chain break engaged. That is why it will not idle when you first start it up. Start the machine and let it warm up, then release the break and try the throttle. The machine may need a carburetor adjustment but I think the break is the problem.
Thanks again from the Husqvarna Technical Services Team.
Hi Yugeun
Thanks for contacting the Answer Army to post your questions.
You are trying to run the machine with the chain break engaged. That is why it will not idle when you first start it up. Start the machine and let it warm up, then release the break and try the throttle. The machine may need a carburetor adjustment but I think the break is the problem.
Thanks again from the Husqvarna Technical Services Team.