A do-it-yourself-friendly self-contained marine air conditioning unit, marine air conditioning system, and method for installation is disclosed. The unit includes a seawater cooling circuit, a refrigerant circuit, and a blower assembly. The refrigerant circuit includes a reverse valve connecting a compressor, an evaporator, and a refrigerant tube thermally engaged with a titanium condenser coil. The seawater cooling circuit includes the titanium condenser coil. The titanium condenser coil has a titanium condenser coil outflow and a titanium condenser coil inflow. The blower assembly is mounted in communication with the evaporator, wherein the blower assembly may pull air through the evaporator. This blower is capable of achieving up to 270-degrees of rotation about a single axis. The system also includes a universal controller to allow for optimal integration with existing systems.