Backchannelmako
Cadet
- Joined
- Mar 20, 2012
- Messages
- 27
4 stroke Merc 25.
After replacing the waterpump impeller I discovered I was not pumping water. Motor overheating, indicator not clogged.
I took lower unit off motor and blew compressed air up the water tube. With the thermostat out, I could not get air to move freely through the cooling system. I could hear a slight bubbling in the engine block. Looking for some good ideas on how to unclog the system.
After replacing the waterpump impeller I discovered I was not pumping water. Motor overheating, indicator not clogged.
I took lower unit off motor and blew compressed air up the water tube. With the thermostat out, I could not get air to move freely through the cooling system. I could hear a slight bubbling in the engine block. Looking for some good ideas on how to unclog the system.