Installation
20220760L 65
6.5 Transducers
Follow carefully the instructions that come with the speed/temp.
and depth transducers.
Mounting Guidelines
Depth Transducers
• The main source of the vessel generated noise is the propeller.
• The deeper the transducer projects the lower the risk of
aerated water.
• On displacement hulls place the transducer 1/3 aft along
waterline.
• Avoid locations near the keel or bow due to aeration.
• Mount the transducer on the side of the hull where the
propeller is moving downward.
• On sailboats mount forward of the fin keel, with minimum
dead rise.
• On planing vessels mount aft near the keel to insure water
contact at high speed.
• On I/O’s mount close to the engine.
• On inboards mount well ahead of the propeller.
• On higher speed vessels (+27 knots) mount in known good
locations.
• Do not mount near water discharge or behind struts or fittings,
which will create turbulence.
• For dead rise greater than 10 degrees a fairing is
recommended.
Speed Transducer
• On sailboats the sensor should be mounted close to the
centerline and 12 to 24” ahead of the keel.
• On displacement vessels the paddlewheel should be mounted
well aft so the sensor is always in contact with the water.
• Do not position the paddlewheel directly ahead of a depth
transducer.
• Do not locate the speed sensor behind struts or thru-hull
fittings.
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