350 Chev Jacuzzi Jet Raw water cooling plumbing help

[randymacbc]

I just picked up an older aluminum boat with a 350 chev inboard and a Jaccuzi 12YJ jet drive. The previous owner had stripped out the cooling sytem and installed Glenwood aluminum manifolds with risers. As he had mostly new hoses but never installed them I am at a bit of a loss as to how to plumb it. There appears to be a hose connection on the jet. Is this the water intake for the system. There are two ports on the front of each manifold and also a port on the underside of each riser that I think is where the warm water from the engine exits thru the exhaust. Does the normal ( in a car) larger rad connections form a closed loop and then the normal heater hose connections are used for inlet and outlet?<br />If anyone could describe the best way to plumb this or point or send me to a diagram it would be a big help.<br />Also is it safe to T in a water hose to run the engine on the hard? Is it safe to run the jet like this or does it need to be submersed.