Thanks for the reply. The thermo in the tank is calibrated. I'm thinking of cranking the flow up and increasing the recirc arm holes.
I use a sparge arm at actually makes the top of the grain bed move arond..at the top a lot.
Also, My thought is the mash out temp was too low. Need to crank he temps up a bit and checkk the crush characteristics. Efficiency is one thing but the outflow temp is weird. I don't doubt he termal couple. It may be picking up residual heat from the burners....?
I may have to text Lonnie Mac to solve this one.