8. Prepare Hull

Prepare Hull Introduction

Note: In Section 8 there are different levels of preparation recommended to the installer based upon the age and history of the boat. For new construction where the transom laminate has not been modified or repaired, follow all sections except for Section 8.6. For old construction where the transom laminate has been modified, repaired, painted or otherwise compromised, follow all sections except for Section 8.5.

8.1. Trace Template Outline

Figure 28 – Wedge Pack Assembly in Line with RRL and Hull Bottom

Based on the selection criteria from Section 5 for mounting location, hold the Wedge Pack to the transom in the designated location. Use a straight edge to align the Actuator Plate with the RRL (shown in blue above) and the bottom of the hull. Two people should be available for this section to make holding and tracing easier and more consistent.

  1. Using a marker or pencil, trace the outline of the Transom Plate on the transom.
  2. Trace three (3) mounting hole (keyhole) locations while the Transom Plate is in place.
  3. Trace out cable entry oval holes.
Figure 29 – Tracing Transom Plate on Hull
Figure 30 – Final Trace n Hull

8.2. Drill Holes

  1. Drill pilot holes for each of the three (3) positioning screws highlighted in the figure below using a 9/64 in. (3.6 mm) drill bit. The screws will be installed such that they are extending off the transom approximately 3/4 in. (19 mm). Drill the holes at the highest available position of the keyhole slot, as shown below.
Figure 31 – Positioning Screw Locations on Transom Plate
Figure 32 – Drill Location in Keyhole

8.3. Wipe Area with Solvent

Using acetone or denatured alcohol and a plain white paper towel, wipe the area down to remove surface contaminants.

8.4. Mask Area with Tape

Mask the area surrounding the Transom Plate with tape to protect the surrounding gelcoat or paint, as shown below. Mask all surfaces below the Ride Reference Line, such as spray strakes.

Figure 33 – Masked Off Transom Plate Location

8.5. Sand New Construction Only

Note: For new construction where the transom laminate has not been modified or repaired, follow this section. For old construction where the transom laminate has been modified, repaired, painted or otherwise compromised, skip to Section 8.6.

Sand down the gel coat with 60 grit sandpaper to remove the gloss surface. You may use a Dual Action Sander (DA), but you must be extremely careful not to remove excess material.

Note: It is important not to change the shape of the transom and to stay within the perimeter of the Transom Plate.

8.6. Grind Old Construction Only

Note: For old construction where the transom laminate has been modified or repaired, follow this section.

  1. If the transom in question has been repaired or modified in any way that would compromise the gel coat to fiberglass bond in the region of the Controller installation, please contact a structural engineer or naval architect to ensure the structure in way of the Controller is suitable for installation. If the structure is deemed acceptable for installation, continue through the following sections.
  2. Grind the area where the Transom Plate is to be mounted, using 60 grit abrasive pad or Dual Action Sander. Remove the outer layers of paint, gel coat, or fairing to reveal the fiberglass beneath.
Figure 34 – Using a DA Sander to Remove Paint and Gel Coat
Figure 35 – Gel Coat Removed

8.7. Insert Positioning Screws

Insert the No. 8 x 1.5 in. positioning screws leaving the head to stand off the hull about 3/4 in. (19 mm). Note: These positioning screws provide no structural purpose and will not support the weight of the Actuator. These screws are intended to assist with installation only and are not meant to handle any forces created by the Controller.

Figure 36 – Positioning Screws Inserted