Mercury MerCruiser Diesel Inboard 2.8L Operation & Maintenance Manual page 62

Section 4 - Maintenance
5. Remove the drain plug, or fitting (if equipped), from the aft end cover of the engine oil cooler.
a
NOTE: In the following steps, the hoses may require lowering or bending to allow seawater to drain completely.
6. Disconnect the seawater inlet hose from the connector on the seawater pump hose and drain.
b
2.8
a - Seawater inlet hose
b - Connector
c - Seawater pump hose
7. Repeatedly clean out the drain holes using a stiff piece of wire until the seawater section is completely drained.
8. On models equipped with a seawater strainer:
a. Remove the drain plug and washer if equipped.
b. Remove both hoses from the seawater strainer and drain them completely.
c. Drain and empty the seawater strainer.
d. Connect the hoses and tighten the hose clamps.
Page 54
a
b
b
c
a
23480
4.2
Typical engine
a - Engine oil cooler
b - Drain plug, or fitting (if equipped)
23295
b
90-8M0133679
c
a
23649
JUNE 2017
eng