Moultrie Boy
New member
I have a problem with my v6 135 Mercury It is a 1987 model. I have replaced the water pump, the thermostats and poppet valve. If you run the motor over 3000 RPMs The gauge will move to hot quickly. Then the alarm sounds. The head temp shows 190 I now have removed the heads to replace head gaskets. Everything looks good. The heads are flat no visable cracks. The temp sensor checked good. Can any body give me some advice?
Thanks for your help.
Thanks for your help.