Well, I just purchased the boat in june and its always been 175. I
didn't think anything of it until I looked in the specifications and
saw that it has a 160 degree thermostat. I think i'm going to just
replace the thermostat with another 160 and see if that changes
anything. oh, i do get a little deiseling on occassion.

Troy

Lost In Space/Woodchuck wrote:
Has it always ran at 175? If so it's normal. I have a Merc outboard which
has 142 thermostats which run around 140 in the spring and 165 later summer
when the water warms up.


wrote in message
ps.com...
Hi I have a 2002 19' bayliner with a merc 3.0L. The manual says that it
has a 160 degree thermostat in it but I warm up to 175 and stay there
from idle to WOT. Sometimes it creeps up to 179 but then goes back down
to 175.

Shouldn't i be running at 160 degrees with a 160 degree thermostat?