Tachometer; Speedometer; Temperature Gauge - Four winns Horizon Owner's Manual

Figure E3: 180-200 Horizon® VDO Module
A. Tachometer
The tachometer indicates the speed of the engine in revo-
lutions per minute (rpm). This speed is not the boat speed
or necessarily the speed of the propeller. The tachom-
eter may not register zero with the ignition key in the OFF
position.
NOTICE
Never exceed the maximum recommended
operating rpm of your engine. Maintaining maxi-
mum, or close to maximum rpm for extended
periods can reduce the life of the engine.
Some engines are equipped with devices that limit en-
gine rpm in accordance with the oil pressure, or engine
temperature. Refer to the engine manual included in the
owner' packet for additional information.
The tachometer must be set for different engines installed.
This is typically done at the factory with the aid of a
software program for the Four Winns/VDO module.
Please consult your Four Winns dealer should an ad-
justment be required.
B. Speedometer
The electronic speedometer on the 180, 190 and 200
Horizon® models have a paddle wheel sender. This
speedo sender provides accurate incremental readings
(+/- 1.5 MPH) at low speeds as well as high speeds.
The speedometer pick-up is located on the transom.
See Figure E4. The paddle wheel extends below the
hull.
As the boat is moving, water strikes the wheel making it
spin. The information is relayed to the speedometer
which displays the speed in miles per hour (MPH). The
faster the boat speed, the faster the paddle wheel turns,
and the higher the speed indication on the speedometer.
180/190/200 Horizon
Owner's Manual
08/01
The paddle wheel is capable of determining the water
temperature. It is equipped with a temperature sensor
and relays this information to the module for display.
Figure E4: 180-200 Horizon® Paddle Wheel Speedo Sender
NOTICE
If the paddle wheel becomes fouled, the speed-
ometer will not register. Clean the paddle wheel.
NOTICE
Speedometers are not precision instruments.
The indications are relative and should never
be used for navigational purposes or similar criti-
cal situations.
DO NOT rely on the speedometer when trying
to achieve a "NO WAKE" condition in a harbor
or other enclosed waterway. ALWAYS reduce
throttle! Speedometers are not effective at mea-
suring low operational speeds. You are respon-
sible for damage caused by the wake of your
boat.
C. Temperature Gauge
The temperature gauge monitors the cooling system of
the engine. A sudden increase in the temperature could
be a signal of a blocked cooling passage or a water
pump malfunction.
The temperature indicator on the 180, 190 and 200
Horizon® module monitors the coolant temperature.
If the coolant temperature rises to, or above 213 de-
grees F an alarm will sound a single beep every two
seconds and the temperature telltale will illuminate.
Section E
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