Auxiliary Hot Water Heater Installation - Mercury 305 CID Service Manual

10. Remove the transmission fluid cooler hose as
shown.
Typical Transmission Fluid Cooler Locations
c - Hose
Walter V-Drive Transmission
a - Drain Plug (2) One Hidden In This View
Index
6A-18 - SEAWATER COOLING MODELS
a
72721
a
71782
a
a
75192
Auxiliary Hot Water Heater
Installation
IMPORTANT: When connecting a cabin heater or
hot water heater, certain requirements must be
met.
Supply hose (from engine to heater) and re-
turn hose (from heater to engine) MUST NOT
EXCEED 5/8 in. (15.8 mm) I.D. (inside diame-
ter).
Engine with a Closed Cooling System: Heater
MUST BE LOWER than fill cap on the heat ex-
changer. If the heater is higher than the fill cap
on the heat exchanger and some coolant is
lost in the system, an air pocket may form in
the closed cooling system. This, in turn, can
cause the engine to overheat.
Make heater connections ONLY at locations
described in the following instructions.
Check complete system for leaks after heater
is connected into cooling system.
Check for overheating condition (of engine)
after heater is connected.
1. Refer to "Changing Coolant - Draining Instruc-
tions"; drain closed cooling system.
2. Inspect for appropriate location of supply hose at
following:
NOTE: Hot water heater supply hose can be con-
nected at several different locations. On some mod-
els, there may be other accessories and options that
are utilizing these hot water supply locations. One of
the following should be available for use when install-
ing a hot water heater system.
IMPORTANT: Do not reposition engine tempera-
ture switch; it must remain where installed by
factory.
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