You can get muffler extensions for the OS46AX. They are oval tube extensions that fit between the engine and the muffler to move the muffler farther out. They come with a set of longer muffler mounting screws that are sized to the extension. I have seen at least two different size extensions. I use one on my Four Star. It is a 1/2 inch extension, and is the smaller of the two that I've seen.

Scott