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Preparing the Hull
Preparing a Cored-Fiberglass Hull
If the core of a cored-fiberglass hull is not sealed properly, water may seep into the core and severely damage
the boat.
Fiberglass or casting epoxy (not included)
Cylinder spacer
Inner fiberglass skin
Core
Outer fiberglass skin
1 From outside the hull, drill a 3 mm (
2 Place masking tape over the pilot hole and surrounding area outside the hull to reduce cracking of the gel
coat.
3 Use a utility knife to cut a hole in the tape over the pilot hole.
4 From outside the hull, use a 73 mm (2
hull.
5 From inside of the hull, use a slightly larger hole saw to cut only the inner fiberglass skin and core.
Take care to cut only the inner fiberglass skin and core and do not cut the outer fiberglass skin.
6 Seal the core inside the hull using either fiberglass
epoxy
(Sealing the Core with Fiberglass,
Sealing the Core with Fiberglass
1 From inside the boat, coat a layer of fiberglass cloth with fiberglass resin, and place it inside the hole to seal
the core.
2 Add layers of fiberglass cloth and resin until the hole is the correct diameter of 73 mm (2
3 After the fiberglass has hardened, sand and clean inside and around the hole.
The cored-fiberglass hull is now prepared, and you can complete the transducer installation.
NOTICE
1
/
in.) pilot hole at the transducer location.
8
7
/
in.) hole saw to cut the transducer hole completely through the
8
NOTICE
(Sealing the Core with Fiberglass,
page 5).
page 5) or casting
7
/
in.).
8
5
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