gaffemaster
Cadet
- Joined
- Jul 6, 2015
- Messages
- 9
I believe that I am having some kind of cooling issue with my 25R78C. I will start the motor and it pumps water hard when its cold. I will then make a short run and bring it back down to idle and the tell tale will start to sputter and eventually steam comes out until you give it some throttle and then the water picks up again. It also seems that the exhaust below the water line stops bubbling out until you get on the throttle again. I just replaced the impeller, plate and housing in August of 2014. I have run it in a tank up to temp and it never seemed to lack on the water like I explained above but when out on the river it has done it every time this year so I'm not running it until I can figure out the issue for fear of over heating. I have read somewhere where guys say this was prone to overheating on the exhaust side. Is there anything that can remedy that problem? I have already redone the lower unit, coils and power pack, carb and fuel pump kit. I believe the motor is strong but am I sticking money into a time bomb? My next consideration was a new head gasket, thermostat and exhaust housing gaskets. All help is greatly appreciated.