1999 "EE" 90, 115 FFI, 150, 175 V4, V6 FFI Outboards Service Manual, P/N 787024, Page 49Get this manual
Electric Circulation Pump
circulation pump is electrically operated, and controlled by the ECU through relay in the Power Distribution PanelIt's mounted on the port side of the vapor separator and is equipped with quick disconnect fitting on the high pressure outletThe pump draws fuel from the vapor separator and supplies it to the FFI system
INote damaged circulation pump is not capable of maintaining
FFI system operationIn key onengine off situation (no tach signal), the pump will operate for only 10 seconds, then stopIf the engine is cranking or running, pump operation is continuousShould the engine suddenly stop running but the key remain on, pump operation will continue for 10 seconds before stoppingPump operation will stop immediately any time the key switch is turned offCirculation Pump Relay and Fuse 40 amp relay in the Power Distribution Panel, Position 10, powers the electric fuel pumpThe ECU controls relay operationA fusePosition 4, protects the pump and its electrical circuitVapor Separator