Ok, so now I have more questions... I was at the boat yesterday and noticed a very large hose connected to a thru-hull on the bottom of the hull. This goes to the engine which I assume is the raw water intake. I also assume that I can remove this hose and put a garden hose in it so that it doesn't pressurize the intake hose but rather allows excess to run over into the bilge. I'm thinking i want to avoid pushing water into the manifolds and then into the cylinders.
Assuming I've got that much correct, I now believe that she might be fresh water cooled. This is my fist inboard boat so I'm learning as I go here. Anyhow, there's a square-ish box on top with what looks like a radiator cap and a skinny hose attached to (what looks like) an overflow bottle. Other than first identifying for certain that it's fresh water cooled, then filling it with the correct coolant, is there anything else that needs to be checked or done before I can start it? I'm fairly certain I saw the heat exchanger on the port side of the engine but didn't get any pics of it or the box on top.
Other than identifying the heat exchanger, is there any other way to tell for certain that she's fresh water cooled? I have the model and serial numbers but can't get anything from it other than it's a lm318b and right hand rotation.
Thanks.