Home › Forum › Ask A Member › Evinrude Exorcist needed… › Re: Evinrude Exorcist needed…
OK, so I am assuming this engine is new to you, correct? Did you run the engine before doing the water pump? If so, did it pump better than it does now? Does the engine look to have been used in salt water? Is the cylinder head/block discolored from prolonged overheating? A blown head gasket or inner exhaust plate will introduce exhaust into the cooling system which could possibly interrupt cooling water flow.
I wouldn’t go through all the trouble of ripping apart one of your other engines. I would pull the copper water tube out of the exhaust hsg just in case there was a restrictor installed. Then, I would install the water tube into the pump and put the drill on it….Not a very accurate test for sure, but might tell you something. Check the air bleed in the impeller hsg, perhaps the impeller hsg/plate are just worn. Are you using an OEM impeller?
There are a few different powerhead base gaskets for this series of engines, using the wrong one will create a leak under the powerhead….
Once the gearcase is off, if everything seems OK, you could reinstall the powerhead and water tube, then try running water through it…A leaky head gasket or inner exhaust cover should show up doing this as well….