Thread: Engine Zincs
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Old 09-22-2017, 04:19 PM   #10
Ski in NC
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City: Wilmington, NC
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Any part of the engine that circulates sea water MAY have a zinc. Most coolant heat exchangers and gear coolers have zincs, but not all. Zinc is usually held by an NPT plug threaded into the sea water side of the cooler. If you see such a plug, take it out and see if it has internal threads or a zinc remnant.

Is your exhaust manifold sea water or coolant cooled?
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