Mercury 4 SERIES

FUEL PUMP & INTREGAL FUEL TANK
Page 3A-6 90-857138R1 MAY 2000
3. Remove screws and plate from pump cover to inspect check valve.
b
c
d
a
a-Stop - Check Valve (Clear Plastic)
b-Check Valve
c-Plate
d-Screw (2)
4. Inspect check valve, gasket, and diaphragm. Replace if damaged.
5. Replace plunger if tip is worn or grooved.
a
b
c
d
a-Check Valve
b-Diaphragm
c-Gasket
d-Plunger Tip