Transducer Mounting; Drilling Holes In The Hull - Raymarine RVM-400 Series Installation Instructions Manual

Warning: Transducer operation
Only test and operate the transducer in the water. Do NOT
operate out of water as overheating may occur.

7.3 Transducer mounting

The mounting procedure below should be read thoroughly before attempting
to mount the transducer.
Stainless steel transducers are suitable for installations on vessels with
fiberglass, metal or wooden hulls.
Important:
• You must use ALL of the supplied parts when installing the transducer.
• When installing the transducer on a vessel that has a metal hull the
supplied isolator parts ensure that the transducer metalwork is fully
isolated from the metal hull.
• Do NOT install stainless steel transducers on vessels with a positive
ground system.
Important:
• Only perform the installation with your vessel out of the water.
• Do NOT lift or suspend the transducer using its cable.
• Ensure that the transducer body is supported during installation.
• Do NOT remove the label attached to the transducer cable; as it helps to
ensure correct connection.
• Do NOT overtighten the hull nut or anti-rotation bolt. Overtightening
can cause damage to the hull which may result in water leaking into
the vessel.
Installation

Drilling holes in the hull

To install a thru-hull transducer you must drill 3 holes in the hull of your vessel.
You should use the supplied mounting template to mark the hole location.
1. Ensure that you are using the correct transducer (i.e.: port / starboard, 0°,
12° or 20° tilted element) for your chosen mounting location.
2. Using self-adhesive tape, attach the supplied mounting template to your
chosen mounting location, ensuring that:
i. the 'Bow' arrow on the template is pointed towards the vessel's bow.
ii. the mounting template is parallel to the centerline of the vessel.
iii. the template is flat and not creased.
3. Pierce the template at each hole center and mark the hole locations on
the hull using a pencil or marker..
4. Remove the template from the hull.
5. Drill a pilot hole for the transducer stem hole.
6. Drill a hole suitable for the 68 mm (2
(1)
external isolator plate. The boss on the external isolator plate must sit
inside the hull.
/ inch) boss on the top of the
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