ORIGINAL: N1061D
Assuming your .46 is new,out of the box.....the owner's manual supplied reccomends high temp RTV (red) sealant between muffler and exhaust.It only takes a very small amount/ bead.I had some leakage between the muffler halves......RTV'd that part too.........no leaks now.
N1061D,
I'm not trying to start an aurgument here, but nowhere in the manual for the OS 46 AX does it say so use any kind to mount the muffler. Mufflers on OS engines are designed to be mounted with no gasket, and when installed properly they don't need one at all.
Ken