A cooling system for a marine propulsion device provides a bypass loop around a cooling pump that allows the flow of cooling water through certain components to be reduced or increased as a function of the temperature of those components while causing a full flow of cooling water to flow through other selected heat emitting devices. The shell has flanges at the top and bottom, respectively, constricting the hole size at the ends of the shell. Water can be conveyed from the water holding tank to clean concrete from utensils, chutes, pumps, and other implements through a hose.