Multiple Instruments; Impeller/Transducer Installation; Transom And Thru-Hull Mount; In-Hull Installation - Standard Horizon MD150 Owner's Manual

4.4 Multiple Instruments

The MD150 may be used as an individual instrument
or connected with a number of other 150 series
instruments to the 150 series repeater, STANDARD
HORIZON GPS Chartplotters or to other instruments
accepting NMEA 0183 data.

4.5 Impeller/Transducer Installation

Note: It is wise to check the operation of the
speed impeller before installation. To check;
apply power to the instrument, plug in the
impeller, spin the paddlewheel, and check
the instrument for a speed/temperature
reading.
Note: The depth transducer cable may be
extended but depth performance may be
affected. One EX345 Optional Extension
Cable may be used for a maximum length of
45 feet.

4.5.1 Transom and thru-hull mount

Transom mount and thru-hull impellers and
transducers can be used with the MD150. See
section 3 for a list of available impellers and
transducers. Specific installation instructions are
MD150 User Manual
supplied with each impeller or transducer.

4.5.2 In-Hull Installation

Transducer installation inside a solid fiberglass hull
may degrade performance of depth sounder.
Therefore, this type of installation is not preferred
over thru-hull and transom installations.
Should the user desire to perform an in-hull
installation, perform the following test to determine
its suitability:
1. Fill a thin plastic bag with water and suspend
the transducer in the water.
2. Hold the bag against the hull while the boat is
moored and underway and check the reading
on the instrument. The reading should be
relatively constant.
3. The bag may have to be moved around the
hull to find the best mounting location. The
best location will be close to the center line,
away from lifting strakes.
4. When a suitable location is found, clean the
surface with a solvent/cleaner to remove any
loose dirt or wax. Use a quality epoxy to
attach the transducer to the inside of the hull.
Make sure there are no air bubbles trapped in
the epoxy.
Owner's Manual
Page 7