I was working on the carb tuning on the ramp, and noticed the temp was 180, which is higher than I have ever seen it. I found that my relief valve jam nut had backed off and so the adjustment was out of wack. Fixed that, and the temp was still 160ish idling and would drop to 140 when revved up to say 1500 rpm. It was a hot day and the water was quite warm, like bathwater. At idle (750 rpm) the gage on the pressure regulator was bouncing around 2-3 psi, 1500 would bounce 6-7 psi, and would hit 10-12 psi at 2000 rpm and up (I have it set to start relieving pressure at 10 psi, so at 2000 there is a slight dribble of water coming from the regulator dump). From the typical comments, people have a hard time getting the temps above 130-140 so is my pressure low at idle? or typical?