Hi all....Shannon brought this to my attention, that on listening to my motors on a Youtube clip, the exhaust didn't sound quite right to him. On investigation, I discovered that the bell part on the muffler on both engines was seized in the muffler inlet pipe. I was unaware until quite recently that the bell part was supposed to slip in and out of the muffler to stop the transmission of vibration to the airframe....Also the captured connecting pipe on both engines is very poorly aligned, which means I'm going to have to shorten the front legs on the mufflers by roughly .5'' to bring the connecting pipe in line with the two bells.
It makes me wonder how many others have the same situation, and aren't aware of it...
Good ear Shannon.....thanks.......Pete