Re: marinas
Assuming this is a mooring spot with no services, need a fresh fully charged battery and at least one auto bilge pump. Two is better. Bottom paint is a good choice even in fresh water, IMHO, given water quality (this is off a river, as i read your note) and critters like zebra mussels. Keep the lower unit out of the water, and if unable to completely do that (skeg or part of gearcase, for example) get some of the clear coat stuff meant to function like bottom paint on aluminum lower units. A good fitting mooring cover is important, as is regular checking and running of the boat. There are some issues, but believe it beats trailering for a lot of owners.