1978 Johnson 4HP outboards Service Manual, Page 18Get this manual
SECTION FUEL SYSTEM
TABLE OF CONTENTS
PAGE DESCRIPTION THEORY OF OPERATION TROUBLE ISOLATION CHART REMOVAL OF CARBURETOR AND LEAF VALVECARBURETOR DISASSEMBLY CLEANINGINSPECTIONAND REPAIR CARBURETOR REASSEMBLY REASSEMBLY OF CARBURETOR AND LEAF VALVES TO MOTOR CARBURETOR ADJUSTMENT FUEL PUMP AND FILTERFUEL PUMP PRESSURE TEST REMOVAL OF FUEL PUMP AND FILTER CLEANINGINSPECTIONAND REPAIR REASSEMBLY OF FUEL PUMP AMD FILTER FUEL TANK CLEANINGINSPECTIONAND REPAIR 3-2 3-2 3-3 3-5 3-5 3-6 3-9 3-10 3-10 3-11 3-11 3-11 3-11 3-11 3-12 3-12