150 4-stroke operating temp

[Northwoodswalleye]

I have a 2016 Mercury 4-stroke on a tin boat. I bought and installed a mercmonitor gauge and am seeing the temp gauge pretty much stuck on 123 degrees when running down the lake wide open. This seems too cold to me but can't really find any info on the degrees of the thermostat. I emailed the service department at my dealer and got zero response from them. Does anyone here know if this motor is running too cold?

[jethro1]

Thermostat starts to open at 115 ~ 125 degrees F. Should be fully open at 150 degrees F.

[cfm56doc]

Mine is right at 123-125 as well, but after WOT and back on idle my engines temp will creep up to as high as 130 until it cools it back down. Keep in mind my lake water temp here is already nearly 80*.

[JRM850]

Yeah, I have to work to get mine to 135.

[Northwoodswalleye]

Nothing to worry about then. Water temp here is 51

[EuropeanAM]

Perfectly normal. Temps will vary, based on lake-water temp and engine load/RPM.