Bought a DDT scanner last week and hooked it up and watched the water temp on each head while it ran at an idle. Starboard head was always about 30-40 degrees hotter than the port head. Is this normal? I just installed the new 130* thermostats and covers. The other motor that I haven't installed the thermostats on also has this issue. The overall temp did not get as high on this motor, but the starboard head was still about 30* hotter than the port head.

The motor with the new thermostats ran with the starboard head at 150* and the port head about 110*. This does not seem right to me.

Also, what does the dash mounted temp. gauge get its reading from? The port or starboard head?