Silva TH52 installation manual Installation, Hole Drilling

Page 8

DEPTH TH52

English

4 Installation

Cored fiberglass hull—Follow separate instructions on page 4.

4.1Hole 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.

11-7

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Contents Depth transducer TH Depth TH52 11-2 Connection to INSTRUMENT/CONTACTS Applications Tools and Materials NeededAcoustic Noise PlacementMounting Location Boat Types Best location for the transducer 11-6Installation Hole DrillingInstalling BeddingChecking for Leaks Blanking PlugInstallation in a Cored Fiberglass Hull Maintenance CleaningCalibration Antifouling PaintTechnical Data 11-13 11-14 Depth TH52