Raymarine HYPERVISION HV-300 Installation Instructions Manual page 33

5. Drill a pilot hole in the center of the location marked out for the transducer stem.
When drilling holes in hulls that have a dead rise, ensure that holes are drilled straight up and
not at the angle of your hull.
6. Drill the stem hole using a 32 mm (1 1/4 in) hole cutter.
7. Using a half round file and / or sandpaper, ensure there are no rough edges or burrs around
the transducer stem hole.
8. Wipe the mounting location and transducer stem hole with an appropriate cleaning agent (for
example: isopropyl alcohol), and ensure the surfaces are dry, clean and free from debris.
9. Guide the transducer cable through the hole and ensure that the transducer stem fits in the hole.
10. Remove the transducer and cable from the hull.
11. Drill a 9 mm (11/32 in) hole in the center of the location marked out for the anti-rotation bolt hole.
12. Check the anti-rotation bolt fits in the hole.
13. Wipe the top face of the transducer, the transducer stem, the anti-rotation bolt and the bottom
face of the bottom half of the fairing block with an appropriate cleaning agent (for example:
isopropyl alcohol), and ensure the surfaces are dry, clean and free from debris.
14. Guide the transducer cable through the stem hole in the bottom half of the fairing block.
15. Apply a thick bead of marine-grade sealant:
i. in a continuous bead, all around the perimeter of the top face of the transducer.
ii. all over the top face of the transducer.
iii. all around the base of the transducer stem, ensuring that the sealant will protrude
approximately 6 mm above the final tightened nut.
iv. all over the bottom face of the bottom half of the fairing block and all over the vertical circular
recess area.
v. around the stem of the anti-rotation bolt, close to the head of the bolt.
16. Insert the anti-rotation bolt into the anti-rotation hole in the bottom half of the fairing block.
17. Push the fairing block down onto the transducer ensuring that the anti-rotation locator is aligned
with the anti-rotation bolt locator on the top face of the transducer.
18. Wipe off any excess sealant protruding from the edge of the transducer / fairing block.
19. Wipe the top face of the bottom half of the fairing block and the mounting location on the hull
with an appropriate cleaning agent (for example: isopropyl alcohol), and ensure the surfaces
are dry, clean and free from debris.
20. Apply a continuous, thick bead of marine-grade sealant all around the perimeter and across the
top of the top face of the bottom half of the fairing block, where it will meet the hull.
21. Apply a thick bead of marine-grade sealant all around the edges of the holes in the hull.
22.Guide the transducer cable up through the stem hole in the hull.
Installation 33