VA LSV is correct.

Just follow hoses up.
Thru hull to v-drive
V-drive to Trans
Trans under engine to raw water pump.
Water pump to coolant heat exchanger - canister on starboard side of raw water pump

Canister to exhaust manifolds

The u-pipe under the pump is a low spot that can catch debris also. There is a blue plug in this pipe to pull and check for water.

Also, you can pull the water flow sensor out and check for a clog there. It has a key ring on it and is tight to get out.