8.5. Grind – Refit Installation Only

Note: Follow this section for most refit installations. If the boat does not meet the criteria listed below in Section 8.6, or if there is any uncertainty, continue with this section.

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.

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.

For aluminum hulls, use 80 grit sandpaper, a grinder, wire brush or a Dual Action sander to scuff the entire mounting surface to remove all coatings and oxidation until the Seakeeper Ride Controller area is a rough surface with no impurities for the MMA to adhere to.  

Note: Be sure to wipe the sanded down area with Acetone to allow for a clean space before Plexus MMA adhesive is used.

Figure 33 – Using DA Sander to Remove Paint and Gel Coat
Figure 34 – Gel Coat Removed