Mercury 25 EFI Service Manual page 205

Digital Pressure Meter
3. To access the VST drain hose, remove the two screws securing the lower cowl to the driveshaft housing.
4. Spread the lower cowl open and remove the cowl from the driveshaft housing.
a
5. Use an appropriate container to capture fuel drained from the VST.
a
b
6. Open the VST drain screw and allow the VST to drain completely.
7. Remove the hose clamp securing the fuel hose to the VST. Remove the fuel hose from the VST.
8. Remove the vent hose from the air vent assembly.
9. Disconnect the high pressure fuel pump wire harness connector.
10. Remove the two bolts securing the VST to the cylinder block.
90-8M0105568 eng MARCH 2016
a - Lower cowl screw (2)
10213
c
10214
© 2016 Mercury Marine
91‑892651A01
a - VST vent hose
b - VST drain hose
c - Fuel pressure regulator vent hose
10217
Service Procedures
Page 3C-21