After building race car engines for forty years I bought a sailboat with an Atomic 4. Could not stand any sort of problem.They always occur just when you shift into reverse just before ramming the million dollar yacht moored next to your slip. So.........
I installed a low pressure electric fuel pump, available at any auto parts store, a new Don Moyer carb, an electronic ignition from Indigo aaaaaaand a very large fuel filter designed for a diesel truck with a water drain on the bottom of the filter. Once a week or so I just put a GLASS cup below the filter and drain the water.
So far I have not had to call my insurance carrier about that 80' Bertram next door. ( I also rebuilt the old carb as a backup. It is really easy, just keep track of the parts as you take it apart. clean everythig, blow it all out with air, then put the new ones where the old ones were.) It would also be very important to make GOOD friends with the owner of the 80' yacht.