Well, my 2010 Merc proxs with 350 hrs just blew the #6 cylinder. Mechanic is saying at minimum if the head is ok will be 5500.00 to fix. If problems exist with the head then he said we are looking close to 10,000. I am not sure of rigging prices but looks like a new 250 proxs is going to run about 23-25 G's. If you were in this situation would you repower or rebuild? I have a pit in my stomach, retired on a fixed income and that's big numbers. Any advice would be appreciated.