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Engine Question

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As I was warming up the engine with the fake a lake I saw this on the ground so I cought some in a glass container and I am stumped as to what it is. I think it may be electrolisis from the aluminum heads and the iron block? Has anyone seen this? They are soft?

2007 HH with 400 fresh water only hours.




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It was straight out of the exhaust. Both sides were the same. The concrete was clean before I started the engine. I noticed the white specks on the ground and turned off the engine. After trying to find out where it came from I started up the engine again and caught it in a clean glass container. And got the same white specks. I have never seen it before and then thought about the water flowing through the Aluminum heads and iron block water jackets.

Any Ideas?

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How long was the boat laid up before you started it? If it's been winterized for a while it could be that some areas finally dried up leaving lime or calcium deposits then they shook loose with the new water flow.

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