Oops ... my mistake, it's the power steering cooler ... d'oh.

"Bowgus" wrote in message
...
The "filter" is on my mercruiser the oil cooler. Raw water from the
impeller
flows through this on it's way to the engine water pump. Look for two
smaller lines (in/out) which (on my GM engine) are oil.


- I did "not" test the "filter" (at least I think it's a filter). It
looks like a large version of an inline fuel filter.