Monterey Boats 350 Sport Yacht, Owner'S Manual

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350 SPORT YACHT
26
place a propeller immediately if it has been dam-
aged. A damaged and therefore out of balance
propeller can cause vibration that can be felt in
the boat and could damage the outdrive gear as-
sembly.
Some propellers are stamped with a special code
instead of the diameter and pitch. Please refer to
the outdrive owner’s manual for specific informa-
tion on propellers and the proper installation pro-
cedure.
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 recommended range, the propellers must
be changed to prevent loss of performance and
possible engine damage.
Diesel and gas engines can be damaged and the
warranty voided if the boat is not propped cor-
rectly. Always consult your Monterey or autho-
rized engine service dealer when making changes
to the propellers or if the boat does not run near
the top recommended RPM.
Your boat was shipped with propellers that typi-
cally provide optimum performance for your boat.
However there are factors that can affect perfor-
mance and propeller requirements.
Note: Before changing propellers 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 con-
ditions are those normally experienced
before changing propellers.
• The addition of heavy equipment like life rafts,
personal water craft, additional coolers, etc.,
will cause additional load on the engines.
Consequently, different propellers may be
required.
• 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 propellers, there is a good
chance the propellers are not the problem.
• Boats operated at high altitudes (above 2000
feet). Engines operated at high altitudes will
not be able to develop as much horse power
as they do at or near sea level. Consequently,
different propellers may be required.
1.7 Engine and Helm Instrumentation
The helm station is equipped with a set of engine
instruments and/or alarms. These instruments al-
low the pilot to monitor the engine operational
conditions. Close observation of these instruments
allows the pilot to operate the engines at the
most efficient level and could save the engines
from serious costly damage. The instrumentation
is unique to the type of inboard/outboard motors
installed on your Monterey. Some or all of the
following gauges and instruments may be present.
Tachometer
The tachometer displays the speed of the engine
in revolutions per minute (RPM). This speed is not
the boat speed nor necessarily the speed of the
propellers. The tachometer may not register zero
with the key in the “OFF” position.
MAINTAINING MAXIMUM, OR CLOSE TO
MAXIMUM RPM FOR EXTENDED PERIODS CAN
REDUCE THE LIFE OF THE ENGINE. NEVER
EXCEED THE MAXIMUM RECOMMENDED
OPERATION RPM OF THE ENGINE.
Temperature Gauge
The temperature gauge indicates the tempera-
ture of the engine cooling system. A sudden in-
crease in the temperature could signal a blocked
cooling passage or a water pump malfunction
Engine Instruments