Sailing Supernova · video

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The crew of the catamaran Supernova diagnoses a suspected head gasket failure by testing the engine's coolant system for air bubbles.0:18 After running the engine for 20 minutes with a bucket test, they determine the issue is a collapsed coolant hose rather than a blown head gasket.3:35 They replace the damaged hose with a temporary fuel line and confirm the engine operates normally.3:59 Before departing Mazatlan for Isla Isabel, the crew also attempts to troubleshoot a non-functional alternator with the help of a friend, though the unit remains inoperable.7:51 The vessel then completes an overnight passage to Isla Isabel, motoring through light winds and fog.15:27 Upon arrival at the island's eastern anchorage, the crew secures the boat using a bridle with a spliced Dyneema soft shackle.20:09 They spend the following day spearfishing and hiking the island's trails.20:52 A collapsed hose can mimic the symptoms of a blown head gasket, making a simple pressure or bubble test a necessary diagnostic step before performing major engine repairs.

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