What makes the poppet valve open on a 2005 250 XS OT999026. At what temp, speed or PSI makes the poppet valve open? Or is it a combination of these factors? How do you know it is open and closing reading smartcraft/mercmonitor?
My temp is staying at about 120 degrees rising to 124- 130 depending on RPM/speed never goes above 130 even WOT 15/17psi. Thermostats are clean and working. Getting about 8/9 psi at 30. 10 psi at 40. Water temp is 79/81 degrees.
How do you know if the poppet valve doesn't open or stays open?