1985 Johnson 120 control valve assembly

[boatintx]

I apologize if this has been answered somewhere already. A few searches have yielded results in which suggestions were made to remove the part as it's not needed. Mine is leaking and the part is obsolete. The posts I found with search were hinting to 1993 thermostat parts to make the cooling system work correctly if the control valve assembly were removed. What exactly do I need to do to remove the control valve assembly and make the cooling system work appropriately.

 

[Faztbullet]

The modification involves removing the flow control valve and all associated water lines, and removing the thermostat covers and diaphragms. You'll then install thermostat covers, springs, and gaskets from a 1990 70 hp engine (you can use the existing thermostats).

 

[Godiving]

I am going through the same issues with a 1986 Johnson 140. So after installing the 70 hp covers, springs, and gaskets I should be able to just remove the nipple from the block and install a plug to stop the water flow for the control valve?

 

[boatintx]

Sorry I got lost with this project and haven't posted back. I currently have not made the change to my Johnson yet but probably will this fall as this is my other boat that doesn't see much use.