Three yeas ago my exhaust rotted through on a trip to a fireworks show. The boat got pretty hot and was limped back to the marina. I replaced the easy parts ( the straight ones ) and saved the brass parts for reinstallation. Replaced the exhaust.
Has no water circulation.
In trying to troubleshoot this problem I have replace the water pump, the head gasket, all the hoses, have no thermostat in it at present time. The engine still overheats after about five minutes of idling. I'm still getting no raw water coolant circulation. Any suggestions would be greatly appreciated. I would love to use my boat again and reallly need to redo the bottom paint. The boat is a 36' Islander from 1976 with the Atomic four engine.