Water Pump Assembly - Mercury 225 EFI Service Manual

Water Pump Assembly

Installation
NOTE: The gaskets/face plate hole pattern is not symmetrical. If the holes of the gaskets/
face plate do not align with the screw holes of the gear case and/or each other, one or
more of the parts is upside down. Determine which part(s) is (are) upside down and turn
the appropriate part(s) over.
1. Install the small hole gasket then the face plate followed by the large hole gasket onto
the gear case.
a -
b -
c -
2. Place a small amount of 2-4-C Marine Lubricant with Teflon on the flat surface of the
impeller key and install the key onto the drive shaft keyway.
IMPORTANT: When using an impeller whose blades have taken a set, face the curl
of the blades in a counterclockwise direction. Do not install the impeller with its
blades oriented in a reversed direction from original rotation, or premature impeller
failure will occur.
3. Assemble the water pump impeller onto the drive shaft and down over the key.
2-4-C Marine Lubricant with Teflon
95
a -
b -
90-884294 OCTOBER 2001
c
b
a
Small Hole gasket
Face Plate
Large Hole Gasket (GRAY sealing ring faces up)
a
95
Water Pump Impeller
Water Pump Impeller Key
LEFT HAND NON-RATCHETING
b
58011
57938
Page 6B-97