I had a problem a while back with my muffler coming loose every few hours of flying. I could become disconcerting because when it came loose the engine sounded very different, causing me great concern. At the last annual, two weeks ago, I had the mechanic replace the muffler clamps with new $60 ones from Univair. I flew 9 hours last weekend to Knoxville and as we returned the engine sounded funny again. After landing I looked and the right stack had come completely out of the muffler!
Any ideas of why the muffler won't stay tightly clamped onto the stacks? Thanks! Larry Snyder N99340
