Fuel Cooler; Fuel Cooler Removal - Mercury 25 EFI Service Manual

10. Connect the VST vent hose to the air vent assembly. Secure the VST vent hose to the air vent assembly with a spring
clamp.
11. Install a 16.8 mm diameter hose clamp onto the fuel hose and install the fuel hose to the VST. Crimp the fuel hose clamp
with a hose clamp tool.
12. Secure the engine wire harness, oil pressure sensor wire, crank position sensor wire, and high pressure fuel hose with the
clamp.
13. Connect the high pressure fuel pump wire harness connector to the high pressure fuel pump.
b
a
Description
Bolts securing the VST (2)
Hose Clamp Tool Kit
14. Prime the fuel system by turning the engine over with the lanyard switch in the "OFF" position. Check for leaks and repair
as needed.
15. Install the lower cowl to the driveshaft housing and secure with two screws.
a

Fuel Cooler

Fuel Cooler Removal

Performing service or maintenance without first disconnecting the battery can cause product damage, personal injury, or
death due to fire, explosion, electrical shock, or unexpected engine starting. Always disconnect the battery cables from the
battery before maintaining, servicing, installing, or removing engine or drive components.
Fuel is flammable and explosive. Ensure that the key switch is off and the lanyard is positioned so that the engine cannot
start. Do not smoke or allow sources of spark or open flame in the area while servicing. Keep the work area well ventilated
and avoid prolonged exposure to vapors. Always check for leaks before attempting to start the engine, and wipe up any
spilled fuel immediately.
90-8M0105568 eng MARCH 2016
e
c
d
10222
a - Cowl screws (2)
10213
WARNING
!
WARNING
!
© 2016 Mercury Marine
a - Hose clamp
b - Vent hose
c - High pressure fuel pump connector
d - Bolts securing VST (2)
e - Air vent assembly
Nm
6
91‑803146A04
Service Procedures
lb. in. lb. ft.
53
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