Ive got a 1994 5-7L gl VP sterndrive in a Chaparral Sunesta 220 w/ DP outdrive. At the lake for 5 days last week. 1st 2 days ran fine. 3rd day started overheating , got around 210 and I shut it off and waited to cool since I was in eyesight of camp. Let cool and pulled freshwater pump checked...