Hi, Daniel
Thanks for contacting the Answer Army to post your questions.
If the shaft connection nut cannot be tightened by hand to remain tight and secure, we can only suggest you have the unit evaluated for cause by an authorized Poulan/Weed eater warranty service dealer. The Owner's Manual has instructions for identifying such dealers in your area.
Thanks again from the Husqvarna Technical Services Team.
Hi, Daniel
Thanks for contacting the Answer Army to post your questions.
If the shaft connection nut cannot be tightened by hand to remain tight and secure, we can only suggest you have the unit evaluated for cause by an authorized Poulan/Weed eater warranty service dealer. The Owner's Manual has instructions for identifying such dealers in your area.
Thanks again from the Husqvarna Technical Services Team.