PURSUIT OS 325 OFFSHORE, Руководство пользователя

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1-2
Section 1 Propulsion Systems
OS 325
Galvanic corrosion is the corrosion process
occurring when different metals are sub-
merged in an electrolyte. Sea water is an
electrolyte and submerged engine compo-
nents must be properly protected. Outboard
engines are equipped with sacrificial anodes
to help prevent galvanic corrosion problems.
The anodes must be monitored and
replaced as necessary. For locations and
maintenance, refer to the engine owner’s
manual.
When leaving the boat in the water, tilt the
motors as high as possible to decrease the
risk of marine growth around the cooling
inlets, propeller and exhaust ports and dam-
age from galvanic corrosion.
1.3 Engine Lubrication
4-cycle engines have an oil sump in the
crankcase. The oil type, grade and level
must be followed in accordance with the
engine manufacturer’s recommendation. It is
normal for 4-cycle engines to consume a
small amount of oil. Check the oil level
before each use and change it following the
engine manufacturer’s recommendation.
1.4 Engine Cooling System
Outboard engines are raw water (sea water)
cooled. Water is pumped through the water
inlets, circulated through the engine block,
and expelled with the exhaust through
exhaust port, water port and the propeller
hub. The water pump uses a small impeller
made of synthetic rubber. The impeller and
water pump cannot run dry for more than a
few seconds. In most outboard engines,
some cooling water is diverted through ports
below the engine cowling. This allows the
operator to visually check the operation of
the cooling system. When the engine is
started, make sure a steady stream of water
is present.
If the boat is used in salt or badly polluted
water, flush the engines after each use to
reduce corrosion. Refer to the engine
owner’s manual for the proper engine flush-
ing procedure.
1.5 Propellers
The propellers convert the power of the
engines into thrust. Propellers vary in style,
diameters and pitch. The best set for your
needs will depend on your application and
expected average load. Propeller sizes are
identified by two numbers stamped on the
prop in sequence; the first is the diameter
and the second is the pitch (example 14 x
21). Pitch is the theoretical distance the pro-
peller will travel in one rotation. Repair or
replace a propeller immediately if it has been
damaged. A damaged propeller can cause
vibration that can be felt in the boat and can
damage the engine gear case. Refer to the
engine owner’s manual for information on
propeller removal and installation.
1.6 Engine Instrumentation
The helm station is equipped with a set of
engine instruments and alarms. The instru-
ments allow the operator to monitor the
operational conditions of the engines. Moni-
toring the instrumentation allows the opera-
tor to operate the engines most efficiently
and prevent serious costly damage. The
instrumentation is unique to the type of out-
NOTICE
Use only the oil recommended by the
engine manufacturer, and monitor the
oil level. Use of any other type of oil
can cause the engine to malfunction
or severe damage.
NOTICE
DO NOT operate an engine out of the
water, even momentarily. Water must
be supplied to the cooling system of
the power head and water pump, or
serious damage will result. If it is nec-
essary to run the engine out of the
water, connect it to an engine flush
attachment design for your specific
engine.