Gen 4 3300 low oil ...
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Gen 4 3300 low oil pressure with hot oil and low RPM  

New Member
Joined: 6 months ago
Posts: 1
Topic starter  


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

Jabiru Support
Member Admin
Joined: 7 months ago
Posts: 76

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 @  And then we can go through the process of finding the problem.