The mockup is shown with the aft side open. The upper runners and the key are visible. From this photo, one can see how the key slides beneath the bow norman pin to hold the mount in place. Note the slots within the runners to permit the norman pin to pass through.

Installation of the locking key’s runners:
1. Create four locking key runners having dimensions ¾” x ¾” x 5-1/2”.
2. With the aft faces of the mount not yet attached, position the mount in place over the bow norman pin.
3. Insert a loosened adjustable square beneath the norman pin on and against the rear edge of one of the mount’s sides.
4. Draw out the square’s ruler until it just clears the norman pin and note this measurement. This measurement will mark the rearmost edge of materiel which must be removed from that side’s runners to permit the mount to pass over the norman pin.
5. Repeat steps 3-4 for the opposite side.
6. Insert an adjustable square beneath the norman pin on and against the rear edge of one of the mount’s sides.
7. Raise the adjustable square until it makes contact with the norman pin.
8. Mark the inside of the mount’s side to denote where the lower edge of that side’s upper runner will be installed.
9. Repeat steps 6-8 for the mount’s opposite side.
10. Remove the mount from the boat.
11. Reposition the square at one of the marks made and extend the line fully forward.
12. Repeat step 11 for the opposite side.
13. Unbolt the sides from the mount.
14. Position the bottom edge of a upper runner on one of the lines.
15. Use a brad nailer to tack the upper runner onto the mount’s side (this will be a temporary fasten).
16. Repeat steps 14-15 for the opposite side.
17. Place the locking key against the bottom edge of the upper runner on one of the mount’s sides.
18. While holding the locking key in place, position a lower runner onto the mount’s side and pressed against the locking key (remember that the key must be able to slide, recommend using a piece of thin cardboard (ex. Posterboard, notepad backer, etc.) between the key and the lower runner to create consistent clearance).
19. Use a brad nailer to tack the lower runner onto the mount’s side (this will be a temporary fasten).
20. Remove the plywood locking key.
21. Mark the position of the upper edge of the lower runner onto the mount’s side.
22. Repeat steps 18-21 for the opposite side.
23. Mark the sides of the mount where both upper and lower surfaces of each runner contact the mount’s sides.
24. Mark any excess length for each runner.
25. Mark the upper and lower runners for each side with measurements obtained in steps 3-4.
26. Measure and mark 1-3/4” forward from the marks in step
27. Label the runners so that they may be repositioned exactly in their current positions.
28. Remove the runners from the sides.
29. On a table saw using either a dado blade or by performing multiple passes with a single blade, create a notch which is approximately .470” deep between the lines created in steps 26. Note: as the marks created in step 25 represent the aft most face of the norman pin when the mount is fully installed, it will likely be necessary to widen the in the direction toward the rear of the mount to permit the mount to be rotated over the norman pin.
30. Cut off any excess length from the runners using the marks created in step 24.
31. Once again use a brad nailer tack the runners onto the mount’s sides in their original positions.
32. Reassemble the mount’s sides to the mount.
33. Verify that the mount can be installed over the norman pin. If not the dado will need to be either lengthened and/or depth increased based upon where the runners are contacting the norman pin.
34. Verify that the locking key can be inserted between the runners and beneath the norman pin. If not, then the upper runner has been installed too high.
35. Once tweaks have been made to permit steps 34 and 35 to be achieved, then the exact dimensions of the mount’s two aft pieces of plywood may be determined using the locations of the runners.
36. Disassemble the mount’s sides from the mount.
37. Drill through the runners and sides to accommodate machine screws to fasten the runners to the sides.
38. Countersink outer side of plywood to accommodate machine screw heads.
39. Secure runners to mount’s sides with machine screws.
40. Install mount’s two aft pieces of plywood.
41. Once again verify that the mount will install over the boat’s norman pin and that the plywood locking key can be inserted.
42. Disassemble the mount, and perform final reassembly with machine screws.

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Date: 07/23/21 - 6:51 AM
Added by: Schuyler84
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