Raymarine DSM25 Owner's Handbook Manual page 20

20
3. Drill a 9/64" (3mm) pilot hole at each of the marked locations.
For fiberglass with a gelcoat surface, you should overdrill the surface to prevent the
Note:
gelcoat from chipping when driving in the screw. Before drilling the pilot hole, hand drill
the marked location with an oversized bit and countersink to approximately 3/8" (9mm)
diameter.
4. Drive the supplied #8 screws into the pilot holes. Screw them in about half way.
x2
x2
DSM25 Owner's Handbook
D7740-1
D7741-1