
FUEL DELIVERY SYSTEMS AND FUEL PUMPS - 5A-1
90-823225--1 1096
Identification
72677
Mechanical Fuel Pump
Replacement Parts Warning
!
WARNING
Electrical, ignition and fuel system components
on your MerCruiser are designed and manufac-
tured to comply with U.S. Coast Guard Rules and
Regulations to minimize risks of fire and explo-
sion.
Use of replacement electrical, ignition or fuel
system components, which do not comply with
these rules and regulations, could result in a fire
or explosion hazard and should be avoided.
Torque Specifications
Fastener Location
Lb. Ft.
N·m
Fuel Pump To Seawater
Pickup Pump
25
34
Fuel Lines
18
24
Fuel Fittings
See Note
NOTE: Refer To “Fuel Supply Connections” Warning
following this chart.
Fuel Supply Connections
!
WARNING
Avoid gasoline fire or explosion. Improper instal-
lation of brass fittings or plugs into fuel pump or
fuel filter base can crack casting and/or cause a
fuel leak.
•
Apply #592 Loctite Pipe Sealant with Teflon to
threads of brass fitting or plug. DO NOT USE
TEFLON TAPE.
•
Thread brass fitting or plug into fuel pump or
fuel filter base until finger tight.
•
Tighten fitting or plug an additional 1-3/4 to
2-1/4 turns using a wrench. DO NOT
OVER-TIGHTEN.
•
Install fuel line. To prevent over-tightening,
hold brass fitting with suitable wrench and
tighten fuel line connectors securely.
•
Check for fuel leaks.
Tools / Lubricants / Sealants
Description
Part Number
Fuel Pressure
Connector (Carburetor)
91-18078
Quicksilver Perfect Seal
92-34227--1
#592 Loctite Pipe
Sealant with Teflon
Obtain Locally
Fuel Pressure Gauge
y
Specifications
Description
Specification
Mechanical Fuel
Pump Pressure
3-8 PSI (21-48 kPa)
Multi-Port Fuel Injection
With VST
43 PSI (206 kPa)
Throttle Body Fuel
Injection With VST
30 PSI (296 kPa)
Throttle Body and Multi-
Port Injection With Cool
Fuel System
30 PSI (296 kPa)
Summary of Contents for 305 CID
Page 7: ...A 1 72000 IMPORTANT INFORMATION GENERAL INFORMATION...
Page 16: ...B 1 IMPORTANT INFORMATION MAINTENANCE...
Page 59: ...C 1 IMPORTANT INFORMATION TROUBLESHOOTING...
Page 92: ...A 2 72975 REMOVAL AND INSTALLATION MCM MODELS ALPHA ONE DRIVES...
Page 103: ...B 2 70246 REMOVAL AND INSTALLATION MCM MODELS ALPHA ONE DRIVES WITH DRIVESHAFT EXTENSION...
Page 120: ...2 72580 C REMOVAL AND INSTALLATION MCM MODELS BRAVO DRIVES...
Page 135: ...D 2 70246 REMOVAL AND INSTALLATION MCM MODELS BRAVO DRIVES WITH DRIVESHAFT EXTENSION...
Page 154: ...E 2 70648 REMOVAL AND INSTALLATION MIE MODELS VELVET DRIVE TRANSMISSIONS...
Page 173: ...F 2 25280 REMOVAL AND INSTALLATION MIE MODELS HURTH TRANSMISSIONS...
Page 189: ...A 3 72615 ENGINE 5 0L 305 CID 5 7L 350 CID...
Page 192: ...3A 0 ENGINES 90 823225 1 1096...
Page 266: ...ELECTRICAL SYSTEMS STARTING SYSTEM A 72079 4...
Page 284: ...STARTING SYSTEM 4A 17 90 823225 1 1096 THIS PAGE IS INTENTIONALLY BLANK...
Page 334: ...C 4 72078 ELECTRICAL SYSTEM CHARGING SYSTEM...
Page 344: ...CHARGING SYSTEM 4C 9 90 823225 1 1096 THIS PAGE IS INTENTIONALLY BLANK...
Page 360: ...D 4 72747 ELECTRICAL SYSTEM INSTRUMENTATION...
Page 380: ...E 4 72761 ELECTRICAL SYSTEM ELECTRICAL KITS...
Page 393: ...F 4 72938 ELECTRICAL SYSTEMS WIRING DIAGRAMS...
Page 438: ...B 5 72681 FUEL SYSTEM MERCARB 2 BARREL CARBURETOR...
Page 467: ...C 5 72085 FUEL SYSTEMS ROCHESTER 4 BARREL CARBURETOR...
Page 497: ...D 5 70389 90 823224 692 5B WEBER 4 BARREL CARBURETOR FUEL SYSTEMS WEBER 4 BARREL CARBURETOR...
Page 538: ...5 71692 E FUEL SYSTEMS MULTI PORT AND THROTTLE BODY FUEL INJECTION...
Page 727: ...F 5 73662 FUEL SYSTEMS BOS SAV EMISSIONS...
Page 744: ...A 6 22381 COOLING SYSTEM SEAWATER COOLING MODELS...
Page 773: ...B 6 72987 COOLING SYSTEM CLOSED COOLED MODELS...
Page 823: ...A 7 72699 EXHAUST SYSTEM GENERAL...
Page 829: ...B 7 72695 EXHAUST SYSTEM MANIFOLDS AND ELBOWS...
Page 835: ...C 7 70593 EXHAUST SYSTEM RISERS...
Page 844: ...D 7 72737 EXHAUST SYSTEM COLLECTORS...
Page 856: ...A 8 DRIVES VELVET DRIVE IN LINE TRANSMISSION...
Page 869: ...B 8 DRIVES VELVET DRIVE V DRIVE AND WALTER V DRIVE TRANSMISSION...
Page 882: ...C 8 25280 DRIVES HURTH DOWN ANGLE TRANSMISSION...
Page 932: ...E 8 DRIVES DRIVE SHAFT PROPELLER SHAFT MODELS...
Page 947: ...A 9 72951 POWER STEERING PUMP...