Quote Originally Posted by jiott View Post
My muffler, supplied by Kitfox, for my 912uls about 5 1/2 years and 700 hours ago is still without cracks. I keep good anti-sieze on all the joints. I do believe vibration is the main issue and try to always have well synced carbs, good prop balance, and avoid idle below 2000 rpm. Also use a shutdown technique that shuts off the engine fairly quickly and smoothly without shaking and clunking. In spite of all this I may just be lucky so far.

That's encouraging, Jim. Thanks!