BoatHowTo · video

What this video covers

Using an engine and propeller as the primary ground path for a lightning protection system poses significant risks to a vessel.0:35 Lightning current prefers a direct, vertical path to the water; routing it horizontally through a boat to reach the engine creates a high risk of side flashes that can puncture the hull.1:04 If the current reaches the engine, it often arcs through bearings and oil, causing internal damage.1:23 Modern engines with electronic control units face a high probability of total failure if subjected to a lightning strike.1:35 Furthermore, poor electrical conductivity between the engine block and the propeller shaft creates additional resistance, further encouraging side flashes.1:42 A proper lightning protection system requires a grounding plate positioned vertically beneath the mast or lightning rod.2:05 All major metal components, including the engine, should be bonded to this central grounding point rather than using the drivetrain as a conductor.2:17

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