Hi guys, I hope someone can help clear this issue for me. I have a 1996 Merc 150 V6. It has a thermostat and a temp guage at the helm and a overheat buzzer thing aswell. I know for sure I am NOT over heating but at idle and only in the water, the temp guage will rise fairly quickly to about 3/4 then all over a sudden jump to full hot and the buzzer goes off. To clear it, I just turn off the motor and turn it right back on and everything shows normal temop and no buzzer. No way does the motor cool that fast, plus, water doesnt steam on the heads and it is only warm to the touch. What I did notice is a wiring issue (I think?). Here is what I see. On the port side of the engine is the buzzer sensor. The brown and blue strip wire goes to a terminal board on the starboard side to screw number 1. On the starboard side is the temp probe and the brown wire goes to the same terminal screw. (I think that is wrong). Then the brown and blue wire comes off that terminal screw and goes to the wire harness and up to the helm. There is also a brown and blue wire comming off that same terminal screw and goes to the powerpack on the port side. Being that the buzzer AND the temp guage are 2 seperate systems, Shouldn't those to indicator leads NOT touch and run independently to the guage and the buzzer at the helm? Please help. Thank you, Dan
