A question about boats on Sakhal (Official)

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A friend of mine told me that when you start the engine or stop the engine on a boat that it has a chance of damaging the spark plug. This makes no sense to me as to my knowledge it doesn't work this way with cars. You can start and stop the engine all day and the spark plug will be fine. It's the act of redlining that can damage your spark plug. Something that, again, to my knowledge, you can't do with a boat. Is there any truth to what my friend is saying? submitted by /u/CatfishBassAndTrou...