J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Engine Trouble

It happened fairly quickly, engine running smooth at 1900, making about 5.5 kts. Then I think I heard a subtle change in the engine tone, it seemed slightly more tinny. 30 seconds later, engine revs dropped, engine died and thats where I am now.

Now I'm thinking that maybe my exhaust elbow is blocked up and by running the engine a little higher than normal maybe it backed up and killed the engine? If this happened, that do I need to do to get the engine running again (once I replace the part?)