Indmar 5.7L Vortec Operator's Manual page 72

Figure 7.2 – Raw Water Pump Impeller
3. Remove the raw water pump impeller from the pump
housing. Replace the impeller if it shows any signs of
damage or wear. Lubricate the impeller with Vaseline
and seal in an airtight bag.
4. Remove the hose from the lower (rear) end of the
transmission cooler. Inspect the cooler for any debris
such as weeds, plastic, etc.
7-4
INDM-A036
5. On Walters V-Drive equipped units, remove the two
small square headed drain plugs from the front and
rear of the upper housing. Look for the words "Water
Drain" on the housing.
Figure 7.3 – Transmission Cooler
Indmar Marine Engines
INDM-A009