FUEL DELIVERY SYSTEMS AND FUEL PUMPS - 5A-190-823225--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
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)
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