I've been dealing with an exhaust rattle and think it may be inside my muffler. On the back there are 3 - 8mm bolts that hold the spark arrestor in. I removed them and expected the arrestor would slide right out, NOT! It's like it's stuck! Anyone had theirs out? Was it stuck? I pried on it some and no movement. Paint isn't even burned off the muffler so it's not all rusted out. Low miles but still, it has a rattle!