Mercury 225 EFI Service Manual page 506

3. Remove the impeller, impeller key, the face plate and gaskets. Discard the gaskets.
a -
b -
CLEANING AND INSPECTION
1. Inspect the water tube coupling assembly for wear or damage. If necessary replace
the worn or damaged components, especially the two O-rings on the inside, one at
the top and one at the bottom.
a -
b -
IMPORTANT: The circular groove formed by the impeller sealing bead should be
disregarded when inspecting cover and plate. The depth of the groove will not af-
fect water pump output.
2. Inspect face plate and water pump cover for grooves and/or rough surfaces.
3. Replace cover and /or face plate if grooves (other than sealing grooves) are more than
0.030 in. (0.762 mm) deep.
90-884294 OCTOBER 2001
a
b
Impeller
Impeller Key
a
Water Tube Adaptor
O-rings (2)
RIGHT HAND NON-RATCHETING
c
d
c - Water Pump Face Plate
d - Gasket (1 each side of face plate)
b
b
70605
70613
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