Hello I boat experts
I have a 1980 Johnson 4.5 model #J5RHCSS. The motor at low rpms overheats and water no longer comes out the tell tale. At anything above a low idle the water will come out the tell tale and the motor will cool properly. I have replaced the water impeller using an OEM complete kit and still have the same results. Just wondering what my next course of action should be. I'm not sure if I should remove the exhaust cover or head gasket and inspect or try another water pump. Just looking for some ideas, the motor runs really well, but I would like to use it for trolling also. Any help would be great. Thanks in advance.
I have a 1980 Johnson 4.5 model #J5RHCSS. The motor at low rpms overheats and water no longer comes out the tell tale. At anything above a low idle the water will come out the tell tale and the motor will cool properly. I have replaced the water impeller using an OEM complete kit and still have the same results. Just wondering what my next course of action should be. I'm not sure if I should remove the exhaust cover or head gasket and inspect or try another water pump. Just looking for some ideas, the motor runs really well, but I would like to use it for trolling also. Any help would be great. Thanks in advance.