Hi ,my son and I purchase a 1987 Capri Bayliner , four cylinder 140 hp, G.M. motor 20.5 ft, . This is our first i/o boat .Last year we had the boat out maybe 12 time?s , it run perfect. The heat gage went up very little ( below 100 % ) the gage will read as high as 250 % . The trouble...
