Installing The Depth Transducer - Simrad IS12 Manual

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WARNING
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The hole must then be sealed - this is especially important with
GRP or sandwich foam hulled boats to avoid osmosis damage.
Ensure the hole and surrounding area is clean and dry - a hot
air gun is a useful tool to use here.
Apply a coating of fibreglass resin to the inside edge of the
hole, making sure all the raw edges are thoroughly sealed.
This will prevent water seeping into the hull layers causing
osmosis or delamination.

4.2.3 Installing the Depth Transducer

Remove the large plastic nut from the transducer and uncoil the
cable. Feed the cable through the hole from the outside of the
boat and then pass it through the nut. Ensure the nut is the right
way round..
Apply a generous amount of silicone sealant to the inside of the
transducer flange, then offer it up to the hole from the under-
neath of the boat (Fig 4.10A) -
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Fig 4.10 - Installing the Depth Transducer
From the inside of the boat, apply more silicone sealant around
the transducer where it meets the hull (Fig 4.10B). Again, be
liberal in application - any excess can always be removed.
Replace the transducer nut and tighten down as hard as possi-
ble by hand (Fig 4.10C).
Take care if using a wrench to tighten the nut - overtightening
could cause it to break. Normally hand tight is sufficient.
Check the installation both inside and out. Remove any excess
sealant using white spirit, making sure that there are no gaps
in the sealant around the transducer. Refer to the instructions
supplied with the sealant for curing times - allow sufficient
time for the sealant to set completely before proceeding.
Instruction Manual
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