Great thoughts by "Alma's Only"! There are several other possibilities. One is that the lightning strike occurred at the dock, when unattended. The boat started, maybe the electronics didn't work, maybe they did initially--but the boat went out anyway. Then after running, one engine, then the other quit. This is not an all that unusual scenario, to have the ECU module fail after running a few minutes. The damage is occult. The owner does not realize a lighting strike (may be side lobes, either air or water), and things aren't quite right, but they start off. Retrospectively the possibility of a lightning strike occurs. This would also jive with the antenna not being damaged as with a direct strike. Only the owner knows--and he certainly should give the entire scenario and have the receipts--if not the insurance company would have records, if the owner authorizes release of them.