Do you want to know how your Marine Gearbox works? (ep 297)
19. juli 2025 · 19 min · 5K visninger · Indonesia
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Removing and rebuilding a marine gearbox requires systematic disassembly and careful management of internal components to ensure proper re-engagement of the clutch cone. On the 40-foot catamaran Learning By Doing, the owner removes the starboard engine's gearbox after experiencing a slipping reverse gear caused by a worn clutch cone.▶ 0:45 The removal process involves disconnecting the drive shaft coupling, exhaust pipe, coolant overflow, gear cable, and engine mounts, while supporting the engine sump with a piece of bamboo.▶ 2:14 Once removed, the gearbox is disassembled on a workbench by extracting the gear selector, adapter plate, and main end cap.▶ 5:58 The internal components, including the clutch shaft and drive cogs, must be stacked in precise order to facilitate reassembly.▶ 10:02 After replacing the fibrous-coated clutch cone, the housing is resealed with RTV gasket maker and tightened in a cross-pattern sequence to ensure even pressure on oil seals.▶ 13:48 Testing the unit in neutral, forward, and reverse before reinstallation confirms the repair.▶ 15:50 Maintaining an organized workspace and documenting the order of parts prevents mechanical errors during the rebuild.
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