3-20
252 Owner’s Manual
COBALT
252
B
OWRIDER
S
ECTION
3
COBALT INSTRUMENTATION
SYSTEM
Your Cobalt boat is equipped with instruments
manufactured by Faria Marine Instruments. Each
instrument has been manufactured in an ISO
9001-2000 registered facility, built to stringent
standards and has passed a comprehensive quality
control procedure prior to shipment. Each
instrument is backed by a limited lifetime warranty.
The Cobalt Instrument System:
The system
consists of individual gauges, wiring harnesses,
senders, sensors and transducers. Each item has
its own tolerances. If these tolerances “stack up” in
opposite directions, it can lead to what may seem a
larger difference in operating readings than actually
exists. In a twin-engine application, it is not unusual
for tachometers and gauges to have slightly
different readings between engines. As long as the
readings are within the engines’ specified operating
range, the engines are operating properly.
Tachometers:
Most tachometers have a tolerance
of 2% of full scale (120 RPM on a 6000 RPM tach).
In a twin-engine application, this could be a 240
RPM difference between each tach reading when
the engines are in sync. The tachometers will read
zero when the key is turned on, without the engine
running. The tach may display a reading when the
key is turned off.
Trim Gauges:
Trim gauges are calibrated to be the
most accurate and useful in the engine down or
“trim” range. The gauge may not read full “up” in
some cases. This is not unusual, nor does it
indicate a problem with either the trim sender or the
gauge.
Fuel Gauges:
Fuel gauges may “bounce” from fuel
sloshing in the tank. This does not necessarily
indicate a problem with the gauge or sender.
Instrument Fogging:
The instruments are
designed to be “fog resistant.” There are small
vents in their cases to allow trapped moisture to
escape. Occasionally moist air may be drawn into
the vents when the air inside the gauge cools down,
after the instrument is turned off. The morning sun
can draw this moisture up against the lens, causing
fogging. Turning on the instrument with the
instrument light “ON” will speed up moisture
removal. Your Cobalt instruments are built to
withstand the harsh marine environment, and
fogging will not harm them.
Radio Transmissions:
Some interference (erratic
operation) may be noticed on tachometers or
synchronizers during radio transmissions. This will
not damage the instrument or affect its accuracy.
COB_252_OM.book Page 20 Tuesday, April 15, 2008 11:44 AM