5
Hull nut
6
Rubber washer
7
Anti-rotation bolt
8
Transducer stem
9
Anti-rotation bolt cap
10
Transducer
11
Marine grade sealant (non-acetate based)
12
Direction of vessel’s bow
1. Using the location guidelines provided, ensure you have selected an appropriate location for
the transducer. (See
2. Check the labels on the bronze face of the transducer to confirm that you are using the correct
type of transducer (element angle; port or starboard) for the mounting location you have chosen.
3. Fix the transducer mounting template to the selected location using masking or self-adhesive
tape, ensuring that the arrow on the template is pointed towards the vessel’s bow.
4. Drill a pilot hole for the transducer stem hole.
5. Drill the stem-hole out using a suitable size hole cutter.
6. Using a half round file and / or sandpaper, ensure there are no rough edges or burrs around
the stem hole.
7. Guide the transducer cable up through the hole in the vessel’s hull while supporting the
transducer from beneath.
8. From inside the vessel, feed the transducer cable through the rubber washer.
9. Guide the transducer stem up through the hole in the vessel’s hull, while supporting the
transducer from beneath.
10. With the transducer held in place, check that the anti-rotation bolt hole lines up correctly with the
mounting template.
11. Drill a pilot hole for the anti-rotation bolt hole.
12. Drill the hole for the anti-rotation bolt using a suitable size drill bit.
13. Lower the transducer away from the hull (while keeping the cable threaded through the hull), and
remove the mounting template; ensure that the transducer is still supported from beneath.
14. Carefully remove all labels from the bronze face of the transducer.
15. Wipe all surfaces, both outside and inside the hull, with an appropriate cleaning agent (for
example, isopropyl alcohol), and ensure they are dry, clean and free from debris.
16. Apply a thick bead of marine-grade sealant:
i.
all around the base of the transducer stem, where it will meet the hull.
ii. all around the threaded section of the stem, ensuring that the sealant will protrude
approximately 6 mm above the final tightened hull nut.
iii. all around the stem hole, on the exterior of the hull.
iv. all around the anti-rotation bolt hole, on the exterior of the hull.
17. Apply marine-grade sealant all over the top, bronze face of the transducer, where it will meet
the hull.
18. Guide the transducer stem up through the hole in the vessel’s hull, while supporting the
transducer from beneath.
19. Fit the anti-rotation bolt by sliding it up through the transducer housing, ensuring that the bolt
head is properly seated within the transducer.
20. Apply a thick bead of marine-grade sealant:
i.
all around the stem hole, on the interior of the hull.
ii. all around the anti-rotation bolt hole, on the interior of the hull.
21. Slide the rubber washer down the transducer cable, and over the threaded section of the
transducer stem; ensure that the washer is sitting on the sealant.
22.Ensuring the cable protector is fitted to the hull nut, feed the transducer cable through the nut,
resting the nut on top of the threaded stem-tube.
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