Rotax 912 Muffler internals

Hi Chris,

Find an old one (they are often replaced due to case cracking) and open it up.

Hi this is what I was able to determine via a borescope investigation.

There were a few different exhaust systems that Rotax produced over the years.

The one shown below is P/N 973 385.

This design features a single tube that passes through baffle plates.