Owner`s manual

Propulsion Systems
1-3
Section 1
OS 255
This model may be equipped with Yamaha
Command Link Integrated Information Sys-
tem®. Please refer to Yamaha owner’s man-
uals for information on system operation.
Tachometer
The tachometer displays the engine speed
in revolutions per minute (RPM). This speed
is not the boat speed or necessarily the pro-
peller speed. The tachometer may not regis-
ter zero with the key in the “OFF” position.
Speedometer
The speedometer indicates the speed of the
boat in miles per hour. Most speedometers
measure the water pressure against a small
hole in a pickup tube located in the engine’s
lower unit or mounted on the bottom of the
transom.
Temperature Warning
The temperature warning indicates the tem-
perature of the engine. A sudden increase in
the temperature could indicate an obstructed
water inlet or an impeller failure.
Fuel Gauge
The fuel gauge indicates the amount of fuel
remaining. This gauge is an approximate
indication of fuel remaining and is not a cali-
brated instrument.
Voltmeter
The voltmeter displays the voltage of the
battery and the charging system. Normal
voltage is 11 to 12 volts with the engine(s) off
and 13 to 14.5 volts with the engine(s) run-
ning.
Hour Meter
The hour meter keeps a record of the oper-
ating time for the engine.
Tilt/Trim Gauge
The tilt/trim gauge monitors the position of
the outboard engine. The upper range of the
gauge indicates the tilt, which is used for
shallow water operation and when loading
the boat on a trailer. The lower range indi-
cates the trim position. This is the range
used to adjust the hull angle while operating
your boat on plane. Refer to the engine
owner’s manual for more information on the
operation of the outboard power tilt and trim.
Engine Alarms
Most outboard boats are equipped with an
audible alarm system mounted at the helm,
monitoring selected critical engine systems.
An alarm will sound if one of these systems
begins to fail. Refer to the engine owner’s
manual for more information on alarms
installed with your engines.
! CAUTION
Never “redline” or exceed the maxi-
mum recommended operational RPM
of the engine. Maintaining maximum
or close to maximum RPM for
extended periods can reduce the life
of the engine.
! CAUTION
Continued operation of an overheated
engine can result in engine seizure. If
an unusually high temperature read-
ing occurs, shut off the engine imme-
diately. Investigate and correct the
problem before starting the engine
again.
! CAUTION
If an engine alarm sounds, shut off the
engine immediately. Find and correct
the problem before using the engine
again.