hi im all new to this hobby, before using my boat for the first time i want to be certain the water is circulating properlly and cooling the engine, any tips on doing this? the 2 water pick ups from the rudder are leading to the head, the pipe from the bottom of the head is connecting to the small metal external hole thats on the side of the boat, is this a breather? or for the water thats cooled to engine to pass out from??? theres also one on the other side with a pipe connected to it but its not actually connected to anything? i know i sound like i dont have a clue but im learning slowly ,thanks for your help!