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Old 08-20-2017, 12:29 PM   #11
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Yeah I'm going to go pull the prop. Hoping that's what it is, the more I think n about it.
It's called barnacle buster, but it's supposed to dissolve everything and they recommend it for raw and fresh water cooling systems.
Good luck and keep us posted on the findings.
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Old 08-21-2017, 02:33 AM   #12
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I'm calling the prop spun! Rubber looks a little torn and there's black nasty stuff that was never there before!
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Old 08-21-2017, 02:36 AM   #13
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I guess the only spun prop I've seen before was a Volvo, and you could spin it by hand. Must not have been all this rubber in there to grab it like this prop, and that threw me off at first.
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Old 08-21-2017, 02:40 AM   #14
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I guess the only spun prop I've seen before was a Volvo, and you could spin it by hand. Must not have been all this rubber in there to grab it like this prop, and that threw me off at first.
I spun my BII prop many years ago. It would hold as long as I did not exceed 1800 rpm, above that it would slip. Cost about $175 to replace hub and recondition the prop back then. BII aluminum props can cost between $300 and $500.
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Old 08-21-2017, 02:42 AM   #15
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Yeah, I just had this prop repitched/cleaned up over the winter and that was around $100
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Old 08-21-2017, 02:44 AM   #16
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Well much easier and cheaper than the engine coupler.
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Old 08-21-2017, 02:45 AM   #17
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I'm definitely not complaining
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Old 08-21-2017, 03:29 PM   #18
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Have you checked manifolds and risers? When is the last time they were replaced? How old is the transom assembly? Constriction on the hose passing through the transom assembly can cause heat. Constricted manifolds and risers are also common sources.
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Old 08-21-2017, 03:49 PM   #19
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Constriction on the hose passing through the transom assembly can cause heat.
that's called "bravoitus" or "Bravo Disease" google it
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Old 08-21-2017, 04:49 PM   #20
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that's called "bravoitus" or "Bravo Disease" google it

In post #6 the OP said he verified good raw water flow to the HE therefore the transom assembly should not have blockage in the hose.
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