BoatworksTodayvideo
Correcting A Design Flaw I Overlooked With My Bertram Transom Modification
July 13, 2025 · 29 min · 12K views
What this video covers
Andy modifies the transom of a Bertram powerboat during a conversion from twin inboards to twin outboards with an Armstrong bracket.▶ 2:12 To prevent water from flowing from the deck into the new storage area, he fabricates and bonds composite extensions to the port and starboard sides of the existing transom structure.▶ 4:28 He uses a pre-thickened epoxy cartridge to bond the extensions, noting that the material provides superior strength and convenience for small-scale bonding.▶ 9:57 After the initial cure, he evaluates the joints and decides against applying fiberglass cloth over the seams due to the tight, complex geometry of the area.▶ 17:36 Instead, he opts to build up the low spots and fair the transitions using a structural epoxy mixture thickened with silica.▶ 19:09 He plans to shape and finish these areas to create a sealed, flush surface for the future storage lid. The project demonstrates that most composite modifications can be salvaged or corrected through a process of grinding, filling, fairing, and finishing.▶ 5:12
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