Hi
I have tried working with the US distributor but we seem to have run out of ideas.
My generation 4 Jabiru 3300 has about 92 hours on it. Recently it began showing low oil pressure when the oil is hot and the RPMs are low, about 8 psi below 1400 RPM.
we tried a different washer to retain the PRV, tried an additional washer under the spring, and I even cleaned up the PRV with valve lapping compound. No change.
cruise pressure is now only 34 psi - used to be over 40
Hello Sonex1517,
Sorry to hear of your problems. The causes of this could be difficult to find. The best option is to contact us here via email - enginespares @ jabiru.net.au. And then we can go through the process of finding the problem.
I have sn 33A 2959. Is the cruise oil pressure 40 or 34 psi?
Thanks
I have gen 4 engine too with 200 hours on it and the oil pressure has also dropped, changed oil pressure sender and exactly the same.
Oil pressure drops to 1 psi when hot and engine rpm reduced to idle.
Have added second washer under spring but this also did not help.
At 2850 rpm and 85 deg C oil temp I only have 25 psi oil pressure.
Maybe the oil pumps wear letting oil bypass instead of pumping?
Please help.
