Chrysler 6, 7.5, 180 Sailor Outboard Motors Service Manual, OB 3330, Page 32Get this manual
FUELPUMP GENERAL
The information in this subsection is concerned with the removel, repairand installation of the fuel pumppump flex back and forth by changes in the crankcase pressure of the No2 pistonThis pressure is transmitted to two reeds, an inlet reed and an outlet reed, mounted on plate inside the fuel pump When the diaghragm flexes inward it opens the inlet reed, allowing fuel from the fuel tank to enter the pumpFuel is drawn through fine mesh screen filter before entering the pump Figure 6When the diaphragm flexes outward it closes the inlet reed and pushes the fuel through the outlet reed and out of the pump to the carburetor