Excuse my ignorance, I need to flush it out to make sure there isn't anything obstructing it....so wouldn't I have to disconnect everything?
Ayuh,..... I'm guessin' it's a P/S cooler, rather than a motor oil cooler,....
If so, it's a piece of 3/8" copper tubin', inside that 2" brass housin',....
Not a honey-comb style oil heat exchanger,...
If ya pull the 2 big hoses, ya can probe it with a stick,.... Shine a light through it,.... a pretty Big hole,...
You can flush it by runnin' water from the other end of the forward hose, at the t-stat housin', to the other end of the aft hose, at the transom fittin',...