rv3flier
Well Known Member
I had my Honeywell oil pressure sensor fail at 180 hrs TT and installed a Kavlico sensor instead. This required updating my Dynon D-180 to v. 5.5 to obtain the 5th sensor option for the Kavlico. My oil pressure normally would run near the top of the green upon start up about 70 psi. During my test run today, the oil pressure never registered more than 39 psi and, when warm, it varied between 15 - 20 psi depending upon throttle setting. According to Dynon's spec sheet the 0-150 psi sender will not register "0" when connected to the D-180, it will read 12 psi. They go on to say that "the sensor will display accurately at any pressure (in it's range) above this minimum measurable pressure. If that is so, then I presume that my oil pressure was dangerously low. Or, if the oil pressure scale is Red at zero psi and that is actually 12 psi then is it additive and the Lo pressure scale red/yellow is 12 psi --- then it's actually 24 psi?
Even then 39 psi + 12 psi = 51 psi is low for my engine on start up.
Now, if I got an air bubble in the line to the sensor (mounted with an adel clamp on the firewall) perhaps the air, which is compressible compared to oil, which is not, is interfering with the the reading?
Should I adjust the range scales for red - 0, red/yellow - 12, yellow/green - 29, green/yellow - 100 and red - 110
I think you can tell I'm a bit confused.
Even then 39 psi + 12 psi = 51 psi is low for my engine on start up.
Now, if I got an air bubble in the line to the sensor (mounted with an adel clamp on the firewall) perhaps the air, which is compressible compared to oil, which is not, is interfering with the the reading?
Should I adjust the range scales for red - 0, red/yellow - 12, yellow/green - 29, green/yellow - 100 and red - 110
I think you can tell I'm a bit confused.