You likely have Mercruisers not Cummins, but David Trent used to be at Pirates Cove and he is a good mechanic. The very best guy in Panama City is next door at Treasure Island Marina.......Jay Bodner. Jay will not moonlight, so you will need to go thru the marina who is the local Sea Ray dealer. Jay has helped me with both of my boats for 20 years and I have never yet had to call them back and say "You didn't fix it", "You forgot X", "Its still broken" or you left my boat dirty.........heck I wish they'd make a little mess so I can tell they've worked on the boat, but it is always spotless when I get back. Treasure Island tends to be expensive, but this is an area where you get what you pay for, and Jay always makes up for it in suggestions to head off future problems.
Frank
Frank