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A fishing vessel is powered with a 9 cylinder diesel engine. Power transfer from the engine to the gearbox is enabled through a flexible coupling arrangement. This coupling is made up of a rubber component attached to a finger coupling, shown in Figure 2 with an array of linkage arms. Failure of the linkage arms in this assembly occurred on repeated occasions. After the initial failure a 2mm vertical misalignment of the rubber component was found and fixed. The coupling and the new linkage arms failed after a further 400 hours.
