I had it very nicely cut out to accommodate the engine head. Perfectly centered and a small hole perfectly aligned for the needle on top. I thought I would be able to let the straight pipe out through a fairly small hole in the cowl and attach the muffler afterward. When screwed all the way in, the muffler is about in the middle of the cowl. Even if I made the hole large enough for the muffler, it won't work because the muffler cannot be screwed on with the engine mounted (hits the firewall). Have to attach the muffler, mount the engine and then install the cowl - needs a great huge hole in order to slide the cowl over the muffler. I might slit the cowl and open it up to go over the muffler and cover the slit with some vinyl trim.

As I said, the only way I can see that it would work is to use a different exhaust or mount the engine inverted. New cowl is ordered.

Ross