Mercury MerCruiser MCM 4.3L ALPHA Service Manual page 34

MAINTENANCE
3. Repeatedly clean out drain holes using a stiff piece of wire. Do this until entire system
is drained.
NOTE: It may be necessary to lift, bend or lower hoses to allow water to drain completely
when hoses are disconnected.
4. Remove the engine water circulating pump hose or drain plug, as equipped.
5. Remove the drain plug from the water tube or Cool Fuel System cooler, as equipped.
Some Carbureted Models
6. Remove seawater pump inlet hose as shown.
7. Crank engine over slightly with starter motor to purge any water trapped in seawater
pickup pump. DO NOT ALLOW ENGINE TO START.
Index
Page 1B-34
a
a - Hose, Water Circulating Pump To Thermostat Housing
b - Water Circulating Pump Hose Drain Plug
a
a - Drain Plug
a - Seawater Inlet Hose
b - Hose To Cooler
72587
75018
Fuel Injected Models
b
a
SERVICE MANUAL NUMBER 25
b
76038
75081
a
75533
90-861328--1 NOVEMBER 1999