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Nissan 60HP Alarm question

johnnyd

New member
" The alarm in the control box

" The alarm in the control box started going off. The water telltale port and the cooling water outlet port both have normal water flow. The alarm only sounded when the motor was in gear, either forward or reverse. And quit when shifted to neutral. The impeller has not been changed in at least 4 years that I know of. The motor runs a little rough but had been functioning fine. The owners manual lists about 18 different reasons for overheating, but Im at a loss as to where to start to cure this problem.
Also, any idea on what the black knob is on the front of the control box? It turns freely and tightens securely, but I have had no change in functions and dont dare take it off to peek. "
 
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