Almost 90% of the time, while at cruising rpm's (2,200)I run at 160. That 10% of the time I run at full throttle, or almost 3,000rpm for 20 minutes or more, temps will creep up to 175 or so......on occasion, as much as 180, but never over that.
Have a Universal marine 25 XP diesel engine. I'm curios what the normal running temps for this is.
Rich