Is 150 water temp too low with closed cooling?

Mar 16, 2007
327
Darnestown, Maryland
Boat Info
290 AJ
Engines
Twin Mercruiser 300 hp Bravo III
Installed Monitor Closed cooling last season.
With the by pass tube and smaller circulating pully like on a horizon engine. Everrything seams to be sorted out.

Water temps here are in the 60's

I believe they gave me a 160 deg stat.

The original stat for raw water cooling was 160. I also DID NOT change the ecu's
The engines run fantastic!
So im wondering if i am running too cool?
Maybe it has something to do with the sensor location or the tstat location.

Would the ecu drive the injectors to flow rich-er at this temp? ....wasting fuel?
Thoughts?
 
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