overheating problems please troubleshoot
this motor is a 1983 mercruiser 485 185 hp<br />I rebuilt carb adjusted air/mixter screws idle screw put on water and the temp guage shot up to 240 burried all the way motor steamed just like a car overheating this motor has a closed cooling system. well I changed the thermastat pulled the exhaust manifold and on the top of exhaust manifold there are two cut outs seperated by a wall this wall had a crack in it so I cleaned it up and JB welded,d it, rubber bellow tube coming off back of exhuast manifold had a long gash in it so I replaced it, then I rebuilt the water pump in lower unit. still overheating very quikly<br />I noticed a hole in the large rubber coragated tube that comes out of transum to lower unit but have not changed it can anyone please help me I feel like I'm parts hanging and my wallet is getting thin.
this motor is a 1983 mercruiser 485 185 hp<br />I rebuilt carb adjusted air/mixter screws idle screw put on water and the temp guage shot up to 240 burried all the way motor steamed just like a car overheating this motor has a closed cooling system. well I changed the thermastat pulled the exhaust manifold and on the top of exhaust manifold there are two cut outs seperated by a wall this wall had a crack in it so I cleaned it up and JB welded,d it, rubber bellow tube coming off back of exhuast manifold had a long gash in it so I replaced it, then I rebuilt the water pump in lower unit. still overheating very quikly<br />I noticed a hole in the large rubber coragated tube that comes out of transum to lower unit but have not changed it can anyone please help me I feel like I'm parts hanging and my wallet is getting thin.