Catalina 350 International Association

So I have an Ocean Breeze OB16CH Air-conditioner on my boat (it was not factory) & it has been working fine for years but this spring...it comes on & begins to pump water & cool the boat for about 10-15min but then the water stops pumping & cool air stops flowing. If I shut everything down & re-start it...the same thing happens? Anyone else have a similar problem?

A couple of things come to mind - the strainer on your AC water pump may be clogged. If that looks normal your water pump may be failing. This happened to me several years ago. If the compressor/condenser overheats, the unit will shut down until the temp returns to normal.