Vapor Separator Tank (Vst); Vst Removal - Mercury 25 EFI Service Manual

Service Procedures
5. Install the fuel hose to the high pressure fuel filter. Secure the fuel hose to the high pressure fuel filter with a spring clamp.
b
a
Description
Bolt securing high pressure fuel filter bracket

Vapor Separator Tank (VST)

VST 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.
Failure to release pressure from the fuel system will result in fuel spraying out, which can cause a fire or explosion. Allow the
engine to cool completely and release all fuel pressure before servicing any part of the fuel system. Always protect eyes and
skin from pressurized fuel and vapors.
1. Disconnect the battery cable from the battery.
2. Install a fuel pressure gauge onto the fuel rail Schrader valve and release any pressurized fuel into an appropriate
container.
a
Fuel Pressure Gauge Kit
Dual Fuel/Air Pressure Gauge Kit
Page 3C-20
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WARNING
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WARNING
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CAUTION
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10216
© 2016 Mercury Marine
Spring clamp securing fuel hose
Oil filter
Bolt securing high pressure fuel filter bracket
High pressure fuel filter
Water separating fuel filter
Nm
6
Schrader valve
91‑881833A03
91‑881834A 1
90-8M0105568 eng MARCH 2016
lb. in. lb. ft.
53