Stihl BG-86 Broken Off Muffler Bolt in Block
I am new to the forum and have an issue with my Stihl BG-86 Leaf Blower. While blowing leaves yesterday, I noticed that the muffler assembly was quite loose. Upon inspection after removing the cover to access the muffler, I discovered that (1) of the (2) muffler bolts was broken off at the base. My question is what do I need to remove this broken bolt. It is broken off flush with the head. I assume the head is aluminum and I don't want to damage anything else.
Beyond the repair, what do I need to do to insure that these bolts stay in place?
Thanks in advance!