MONTGOMERY BOATS 340 SPORT YACHT, Owner'S Manual

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MONTEREY
BOATS
Propulsion System
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
conditions are those normally expe-
rienced 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
allow the pilot to monitor the engine operational
conditions. Close observation of these instru-
ments 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 fol-
lowing 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 temperature
of the engine cooling system. A sudden increase
in the temperature could signal a blocked cooling
passage or a water pump malfunction
CONTINUED OPERATION Of AN OVERHEATED
ENGINE CAN RESULT IN ENGINE SEIZURE. If
AN UNUSUALLY HIGH TEMPERATURE READING
OCCURS, SHUT THE ENGINE Off IMMEDIATELY.
THEN INVESTIGATE AND CORRECT THE
PRObLEM.
Oil Pressure Gauge
The oil pressure gauge monitors the engine lubri-
cation system pressure. The oil pressure indicated
when the engine is new is usually the reference
for normal oil pressure for that engine. A drop
in oil pressure is a possible indication of oil pump
problems, a leak or fuel diluted oil.
Fuel Gauge
The fuel gauge indicates the amount of fuel in
the fuel tank. This gauge is merely a relative
indication of the available fuel supply and not a
calibrated instrument.
Voltmeter
The voltmeter displays the voltage for the battery
and the charging system. The normal voltage is
11 to 12.5 volts with the engines off, and 13 to
14.5 volts with the engine running.
Hour Meter
The hour meter keeps a record of the operating
time for the engine. The hour meters are located
in the in the tachometers or multi-meters on most
installations.