Recommendation for Miami area mechanic

[hlev00]

We have a Beneteau 423 sailboat with a Yanmar 4JH4E. The prop is a maxprop. We have been noticing some unusual noise from the shaft area occasionally while underway with the engine or when freewheeling the prop under sail until it feathers. The boat was out of the water in Savannah a week ago and the shaft seemed solid in the cutlass. We did a short sea trial with the yard mechanic and didn’t notice any problem but there was not enough wind to sail and test the freewheeling.

I am interested in recommendations for yards in the Miami area that might be familiar with our boat or similar propulsion systems on sailboats.

Thanks,
Harry