Hey guys I have a volvo penta inline 6 . The model with three carbs. The boat hasnt seen water for a year and was just taken out a few days ago (first time its seen salt). Motor itself ran great. About 15 minutes into being on the water the engine temp maxed out on the gauge and the engine started smoking and steaming. Obviously overheating. I did a quick on the water change of the impeller (the old one had degraded), but it did not fix the problem. It was still overheating. What else could it be? Please help!