I have a 4.3L OMC with an electric pump that is not coming on. I disconnected it an jumpered 12v to it and it works fine. I need to know if it should come on with the key in the on position or does something else cause it to come on? Does it run continuously with the motor running? If it does could I just wire it to a hot lead the is supplied from the ignition switch? If I fill the carb bowl by jumping the pump the engine runs fine until the bowls are empty. What is a good source for elec wiring diagrams for this boat/eng? It is a 1990 19ft seaswirl.