I was responsible for the Swift coring revelation, though it was hotly denied and ridiculed by a TFer,you need to check for yourself. Our Marina mechanic worked for the distributor, confirmed my understanding, adding that silicone sealant was used on thru hulls.
I considered/declined an 04 Swift 42. I think it had 4cyl Yanmars,whatever they were, the raw water introduction to the exhaust was seen as too high with potential to leak back into the turbos.
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BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
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