CLOSED COOLED (FRESH WATER) MODELS SERVICE MANUAL NUMBER 23
Page 6B-18 90-861326--1 MARCH 1999
Auxiliary Hot Water Heater Installation
IMPORTANT: When connecting a cabin heater or hot water heater, certain require-
ments must be met:
• Supply hose (from engine to heater) and return hose (from heater to engine)
MUST NOT EXCEED 5/8 in. (16 mm) I.D. (inside diameter).
• Make heater connections ONLY at locations described in the following instruc-
tions.
• Check complete system for leaks after heater is connected into cooling system.
• Check for overheating condition (of engine) after heater is connected.
CAUTION
On closed cooling models, the heater must be mounted lower than the fill cap on
the heat exchanger. If the heater is higher than the fill cap on the heat exchanger
and some coolant is lost from system, an air pocket may form in the closed cooling
system. This can cause the engine to overheat.
75503
a
Supply Hose Connection
a-Location For Hot Water Supply Hose (Thermostat Housing As Viewed From
Above)
75480
a
Return Hose Connection
a-Location For Hot Water Return Hose
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