1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 71Get this manual
ENGINE CONTROL SYSTEM 3-16 FUEL VAPOR SEPARATOR The fuel vapor separator incorporates float system that maintains constant fuel level inside the separator chamberAs the fuel level decreases, fuel flows into the vapor separator from the low pressure fuel pumpThe function of this unit is to separate vapors from fuel delivered by the low pressure fuel pump or fuel returned from the fuel pressure regulatorThis vapor is routed through the evaporation hose connecting the vapor separator cover to the air inlet cover over the flywheelHIGH PRESSURE FUEL PUMP The high pressure fuel pump is an "integral" type in which the pump mechanism is located within the fuel vapor separatorTo supply the optimum fuel amount, the pump is driven by the duty cycle signal from ECM