Check. That's what it is, an oil cooler. I saw the two smaller lines
coming off earlier but didn't trace them to the end.

I've also discovered another troubling issue. Seems the two block
plugs along the passenger side of the engine block are coming out. In
fact, when I hook up a garden hose directly into the thermostat to
supply water to the engine (thus bypassing the impeller system
altogether). Water is gurgling out/around one of the engine block
plugs. Figures, it's the block plug directly beside the motor mount,
thus I can't get a clear look at what the "true" problem might be.

Anyone know how these block plugs get put back in? Obviously, I'll be
taking this to a marina...I simply don't have the tools and equipment
to lift/hold an entire engine and/or any special tools needed to put an
engine plug back in.

But, it would be good to hear from others that have seen and/or had
this type of thing done. Maybe get an idea of the cost involved and/or
the difficulty involved.

thx in advance,

adym