MerCruiser 305 CID (5.0L) Service Manual page 73

SERVICE MANUAL NUMBER 24
DRAINING SEAWATER (RAW-WATER) COOLED
MIE (Inboard and Ski) Models:
Refer to "Cold Weather or Extended Storage Precautions" in this section, BEFORE
proceeding.
1. Engine must be as level as possible to ensure complete draining of cooling system.
2. Remove drain plugs from bottom of port and starboard manifold fittings.
3. Remove drain plugs (port and starboard) from cylinder block, or cylinder block Y-fitting.
Avoid product damage. Do not disturb the Y-fitting when removing the drain plug.
There is an ignition control "Knock Sensor" in the upper hole of the fitting. This sen-
sor must not be loosened or removed. It is tightened to a critical specification at the
factory.
Starboard Side Shown (Port Similar)
Index
90-861327--1 OCTOBER 1999
a - Exhaust Elbow Drain Plug
b - Cylinder Block Drain Plug
c - Y-Fitting (Fuel Injected Only)
d - Cylinder Block Drain Plug (Fuel Injected Only)
e - Knock Sensor
NOTICE
CAUTION
a
b
MAINTENANCE
c
d
e
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