I have a (approx. 1976) 7.5 hp Honda.
It has a hole in the exhaust pipe, just below the powerhead.
Runs great with cover off, gets choked with cover on.

Need to replace the exhaust tube.

What is the procedure for this? Do I work from the top/down or bottom/up?
What over pieces will need to be replaced? Any gaskets?

Thank you!!!!