Marinediesel 5L V8, Owner'S Manual, Page: 201 / 248

Owners Manual 199 Section 6 - Engine
Seawater Pickup Hose
THROUGH THE STERNDRIVE UNIT
Seawater inlet hose through sterndrive is NOT recommended. Any resulting engine
overheat problems will NOT be covered by Marinediesel’s warranty.
THROUGH THE HULL OR TRANSOM
Seawater pickup hose must be obtained separately if using a through the hull or through
the transom seawater pickup. Hose must be correct inner diameter (refer to
Specifications
) and wire reinforced hose of adequate wall thickness to prevent it from
collapsing from pump suction. Be sure to make hose connections with double hose
clamps. Secure hose to prevent contact with any moving parts.
Seacock
Seacock (seawater inlet valve), if used, must be installed between water pickup and
seawater pickup pump (or sea strainer) to allow operator to shut off the seawater to flush
or drain the engine, or clean the sea strainer while boat is in the water. Valve used must
have an internal cross-sectional area equal to or greater than hose to prevent restricting
water flow. Install valve in an area where it will be easily accessible. Support valve
adequately to prevent hose fatigue. A brass ball or gate valve is required.
Typical Seacock Installation
a -
Seacock
b -
Seawater Pickup (Through The Hull Fitting)
c -
Hose Connector
Seawater Filter
Strainer must be used and must be of sufficient size to ensure that an adequate supply
of water will be maintained for cooling the engine. Refer to
Specifications.
Seawater strainer should be installed in an area where it will be easily accessible for
inspection and cleaning. Strainer must be installed in water inlet hose after the seacock
(water inlet valve) to allow operator to shut off water when cleaning strainer. Hose
connections must be made with double hose clamps. Secure hose to prevent contact
with any moving parts.