Wellcraft 270 Coastal, Руководство пользователя

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Always monitor the oil level in the remote tanks before
each cruise by checking the gauge or indictor lights in
the helm (not available on all engine installations) or
visually checking the oil level using the reference marks
on the tanks.
When additional oil is needed, use only the type of oil
specified by the engine manufacturer. Refer to the
engine owner’s manual for oil specifications and
additional information on the oil injection system.
Note: Always monitor the oil level in the tanks
and only use the type of oil specified by
the engine manufacturer.
4-cycle outboard engines have an oil sump in the
crankcase that must be kept full of the type and grade
of oil recommended by the engine manufacturer. It is
normal for 4-cycle engines to consume a small amount
of oil. Therefore, the oil must be checked before each
use and changed at regular intervals as instructed by the
engine owner’s manual. As with 2-cycle engines, use
only the type of oil specified by the engine
manufacturer.
1.4 Engine Cooling System
Outboard engines are raw water (seawater) cooled.
Water is pumped through the water inlets, circulated
through the engine block, and relinquished with the
exhaust gases through the propeller hub. The pump
uses a small impeller made of synthetic rubber. The
impeller and water pump cannot run dry for more than e
few seconds. In most outboard motors, 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, always check for a steady stream of water
coming out of those ports.
Note: If the boat is used in salt or badly polluted
water, the engines should be flushed after
each use. Refer to the engine owner’s
manual for the proper engine flushing
procedure.
1.5 Propellers
The propellers convert the engine’s power into thrust.
They come in a variety of styles, diameters and pitches.
The one that will best suit the needs of your Wellcraft
will depend somewhat on your application and expected
average load. Propeller sizes are identified by two
numbers stamped on the prop in sequence. The 1
st
number in the sequence (example 14 x 21) is the
diameter of the propeller, and the 2
nd
number is the
pitch. Pitch is the theoretical forward distance traveled
by the boat in each revolution of the propeller.
Always repair or replace a propeller immediately if it has
been damaged. A damaged and therefore out of balance
propeller can cause vibration that can be felt in the boat
and could damage the engine gear assembly. Refer to
the engine owner’s manual for information on propeller
removal and installation.
1.6 Performance Issues and
Propellers
It is extremely important that the boat is propped to run
at or very near the recommended top RPM with an
average load. If the top RPM is above or below the
recommend range, the propellers must be changed to
prevent loss of performance and possible engine
damage.
Note: Before changing your propeller to correct
boat performance problems, be sure other
factors such as engine tuning, bottom and
running gear growth, etc. are not the
source of performance changes. Always be
sure the load conditions are those
normally experienced, before changing
propeller.
Your boat was shipped with a prop that typically provide
optimum performance for your boat. However there are
factors that can affect performance and propeller
requirements. Some are as follows:
• You should be sure the load conditions are those
normally experienced. If the boat ran in the
required RPM range when it was new and you
have not added any additional gear or heavy
equipment and have not damaged the propeller,
there is a good chance the propeller is not the
problem.
• The addition of heavy equipment like life rafts,
additional coolers, etc., will cause additional load
on the engine. Consequently, different propeller
may be required.
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