1986 110 Johnson. How to clean the passages?

[Nick168]

1986 Johnson with intermittent beep
Tell tale has hot water coming out
New t stat and impeller.

How do I clean the water passages I'm guessing one side doesn't get water to cool it down?

 

[riopga]

Does it have VRO? Because I think intermittent is low oil. Pretty sure overheat alarm is a solid beep.

 

[Nick168]

The VRO is disabled
But that's weird to go off and the tell tale is splitting out hot water with muffs

 

[Nick168]

Does it have VRO? Because I think intermittent is low oil. Pretty sure overheat alarm is a solid beep.

The VRO is disabled
But that's weird to go off and the tell tale is splitting out hot water with muffs