As has been mentioned before on this forum, you will also need a new flange that mounts the pipe to the
engine.
I recently did a wet and dry exhaust replacement on a
Yanmar 2GMF and can say you will have a near impossible job to get the exhaust elbow off of the threaded pipe.
A new flange,
gasket, connecting pipe, exhaust elbow, new hose, clamps.
Try a get a
parts diagram of this area. Soak the bolts, threads, nuts with Aero Kroil penetration
oil several times, give them a gentle tap to allow the Kroil to penetrate.
Use a six sided socket. Use proper thread
sealant.
I previously tried to
repair my elbow
leaks with JB Weld...no luck