Mercury FourStroke 2.5 Service Manual page 155

Gear Housing
4. Inspect the pump cover for damage from excessive heat ‑ charring, blistering, or discoloration. Replace the cover as
required.
5. Remove the base plate and the gasket.
a
a
IMPORTANT: If only water pump repair procedures are to be performed, hold the driveshaft down while prying/lifting up on
the pump base to prevent the driveshaft from disconnecting from the pinion gear. If the driveshaft separates from the
pinion gear, the gear housing must be disassembled to realign the driveshaft with the pinion gear.
6. Pad the gear housing surface and pry up on the pump base to remove the base.
a
7. The shift shaft O‑rings are located in both the upper pump housing and the lower pump base. The O‑rings should be
replaced as a normal service procedure.
a
Page 6A-14
a -
b -
b
b
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b
c
b
b
c
c
Base plate
Gasket
a - Pry point
b - Pump base
c - Pad
25541
a - Upper housing
b - O‑ring
c - Carrier O‑ring
25544
90-8M0065421 NOVEMBER 2012