Quote:
Originally Posted by ITD
I think the issue with the auto engines is that while they produce huge hp, they generally only need to do it for a short period of time, where as a marine engine needs to produce large number pretty much all the time. Cooling probably becomes a limiting factor plus part longevity issues.
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That sounds reasonable, but in practice, automotive engines that have been marinized work fine in boat applications. We've been using them for decades and when they fail, it's almost always just due to neglect.
Just to be clear, "marinizing" an engine just means: special gaskets, freeze plugs, raw water cooling and USCG approved external components. The innards are the same.