[Peter Abbott]

Rob, Thanks for this insight. The off engine filtration is a pair of Racor filters. They were 2 micron elements when the boat was new, presumably to deal with an contamination related to the initial boat build. I replaced them with 30 micron per the builders recommendation, but in past years have used 10 Micron. The filter head has a vacuum guage, and the filters operate in parallel, not series.

[Peter Abbott]

The pump had a manufacturing defect that was resolved in the machine shop. That, and the anaerobic sealant have stopped the leak

[Peter Abbott]

Tony – Thanks for weighing in on this one. I have taken the pump to a machine shop to have the gasket surface measured and resurfaced. It was up to .010 off slope on one side, so I am hoping that this manufacturing defect was the root cause. I am awaiting gaskets now and will use the anaerobic sealant as recommended. I should also report that the Twin Disc service rep has been responsive and helpful in this matter. I will enter another post once this is back together and not leaking any more. Thanks again.

[Author]

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