Oh, it definitely is the 15 inch, but the different end cap must mean different construction. I ordered already. My original has the rubber end cap hose clamped on, but the edge of the exchanger where it fits on was bent at some point to get it off (then used for a couple hundred hours). The grooved ridge in the middle is a little monkeyed up, but it apparently worked. This will be an emergencies only spare.
With the 'new' configuration, it must be constructed differently since the bolt on cap and rubber seal underneath don't appear to provide the separation the 'old' configuration did??
Oil cooler . . . OK, avg. water temp Chesapeake 73 degrees. Avg. water temp USVI 79 degrees. I was concerned going from cold water to Caribbean full time, but that seems well within reasonable parameters.
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