GASOLINE ENGINE 8.1 S INBOARD MODELS
Page 23 of 58
Hot Water Heater
IMPORTANT: When connecting a cabin heater or hot water heater, certain require-
ments must be met, including, but not limited to the following:
• 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 indicated in the following informa-
tion.
• Refer to manufacturers’ instructions for complete installation information and
procedures.
CAUTION
Avoid a performance loss and/or possible engine damage. Engine coolant must
flow continuously from the engine intake manifold to the engine water circulating
pump. NEVER close-off or block the coolant flow to or from a heater. All heater
installations must be plumbed in series with the supply and return connections.
CAUTION
Avoid engine overheating which could result in engine damage. An air pocket may
form in the closed cooling system if some coolant is lost from the system and the
cabin heater or hot water is mounted higher than the fill cap on the reservoir. Heater
must be mounted lower
than the fill cap of the reservoir.
IMPORTANT: Do not reposition engine temperature switch; it must remain where
installed by factory.
HOSE CONNECTION
77013
a
b
a-Supply Hose Connection
b-Return Hose Connection
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