"jamesgangnc" wrote in message
ups.com...
Both the 140 and the 160 should work fine. As another poster pointed
out in raw water cooling the use of a 140 helps slow the effects of
salt water. I would install a 160 next time I had a reason to take it
out but I would not make a special exercise out of replacing it. If
you previously have had overheating issues your mechanic may have been
trying to mitigate other problems by running a lower temp thermostat.
The water leaving your engine and going into your manifolds and risers
should be cooler with the 140.


Thanks!

I did notice the temperature ran at 135 when at idle, at 140~145 at cruise
and at 160~165 at WOT, then back down immediately to a lower temperature
when at cruise or idle.

I plan to keep the 140 in the rest of the season.

Thanks again for your advice and comments. ;-)