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I posted a few weeks back regarding our 6BTA 5.9 250 HP engine ceasing. We took the engine out of the boat and come to find out we believe the Sherwood GC5 Seawater Pump, in particular the nut is the culprit. When we started taking it apart the nut was not on the tapered shaft. What we did find was pieces of steal in the gears along with dents that provided us with evidence that the nut came off, got lodged in the gears, stopped the engine and also broke off a piece of the aluminum cover. See pictures below. Has anyone ever experienced this? This pump was installed in August and we pulled the boat from the water for winterizing (we are in Alaska) shortly after. We maybe did 3-4 trips after install. We had a local marine shop install the pump. Do they need to take the nut off or does it all install as one piece? It looks like it could go on as one piece without needing to touch the nut but would like to see if we can get confirmation. If it is all installed as one piece has anyone ever experience receiving a pump where the nut was not torqued appropriately?
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