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DEPTH TH52 English
11-7
4 Installation
Cored fiberglass hull—Follow separate instructions on page 4.
4.1 Hole Drilling
Warning: Always wear safety goggles and a dust mask.
1. Drill a 3 mm or 1/8" pilot hole from inside the hull. If there is a rib, strut, or other hull
irregularity near the selected mounting location, drill from the outside.
Note: If the pilot hole is drilled in the wrong location, drill a second hole in a better
location. Apply masking tape to the outside of the hull over the incorrect hole and
fill it with epoxy.
2. Using the appropriate size hole saw, cut a hole from outside of the hull (see table
on page 1).
Note: All flush models require a countersink tool to create a “seat” in the hull.
3. Sand and clean the area around the hole, inside and outside, to ensure that the
sealant will adhere properly to the hull. If there is any petroleum residue inside the
hull, remove it with either mild household detergent or a weak solvent (alcohol)
before sanding.
Metal hull—Remove all burrs with a file and sandpaper.