I Drilled Straight Through My Boat
7 January 2026 · 28 min · 9K views
Man drills through boat hull, debris flying
What this video covers
Oliver installs an isolation transformer and a battery charger/inverter system in the cramped, dark bilge of his boat. To mount the heavy isolation transformer, he cuts an oak board to size, paints it with bilge paint to prevent rot, and through-bolts it to the hull frame.10:32 He uses a tape-depth marker on his drill bit to avoid punching through the hull exterior during pilot hole drilling.6:42 After struggling with limited access and tight quarters, he secures the unit using stainless steel screws and nylon lock nuts. He also connects secondary battery components, torquing the M8 bolts to 14 Newton-metres as specified in the manual.18:53 Throughout the process, he manages space constraints by temporarily removing previously installed equipment and using a smartphone camera to locate mounting marks in the inaccessible bilge area.23:31 He plans to seal all through-hull penetrations with 4200 sealant to prevent leaks.11:42
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