davostessco
Recruit
- Joined
- Dec 28, 2013
- Messages
- 5
I have just rebuild this 40hp 4stroke and its running sweet apart from its not pumping water properly all the time so its got a new water pump impeller and kit through it .
so I take the thermostat out and start it with water connected and if its cold it sometimes will come up through the head and start pumping properly then it will just stop pumping and the engine gets hot.
any ideas what this could be ive heard the water pressure relief valve can be a problem , is there anything else I can try before I go pulling the power head back off again ??
so I take the thermostat out and start it with water connected and if its cold it sometimes will come up through the head and start pumping properly then it will just stop pumping and the engine gets hot.
any ideas what this could be ive heard the water pressure relief valve can be a problem , is there anything else I can try before I go pulling the power head back off again ??