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Preparing the Hull Pocket
You must drill the transducer stem hole in the hull pocket. The anti-rotation bolt and fairing block are not used
when installing the transducer in a hull pocket.
1 Test fit the transducer in the hull pocket.
The arrow on the transducer must point to the front of the vessel so the transducer aligns with the vessel
heading.
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2 Drill a 3 mm (
/
in.) pilot hole at the location for the stem hole.
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3 Place masking tape over the pilot hole and the surrounding area to reduce cracking the fiberglass gel coat.
4 Cut out the tape over the hole.
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5 Use a 33 mm (1
/
in.) spade bit or hole saw to cut the stem hole.
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TIP: Running the hole saw in reverse helps prevent damage to the fiberglass gel coat.
6 Sand and clean the area around the hole.
Installing the Transducer
Applying Marine Sealant to a Thru-Hull Transducer
You must apply marine sealant to the water path between components to ensure a tight, waterproof seal.
Apply marine sealant between these components.
• Fairing block and hull
• Fairing block and transducer
• Fairing block and anti-rotation bolt cap
• Holes for bolts and transducer cable stem
• Stem and hull nut
• Bushings, stem, and hull
• Transducer and hull pocket
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