My Jabiru 3300 has about 540 hours on it. Its second annual inspection revealed very low compression on the number 5 cylinder. The exhaust valve was burned. The valve seat was OK. The new valve cost about $50 with gaskets and o-rings. All parts were in stock at Jabiru Pacific. Jim over-nighted the parts to me. The repair was easy and the plane is back in the air. Today it flew 635 miles and runs well again.

One worry; the engine has slowly been increasing its oil consumption. It burns about a quart every 500 miles.

My Iridium spark plugs have 200 hours on them now and the gap has not changed. I recommend them.


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Comment by Juan Vega on June 6, 2009 at 8:28am
awesome thanks dude!

Comment by Stephen R. Smith on June 1, 2009 at 5:08pm

The iridium spark plugs are NGK DR9EIX. They are resistor plugs.

Comment by Juan Vega on June 1, 2009 at 4:50pm
what is the number on the iridium plugs do they make restistor (shielded) type?
Comment by Brad DeMeo on June 1, 2009 at 2:07pm
Steve, thanks for the info. Obviously, I am not that far along, but anticipating the timing of it will help.
Comment by Stephen R. Smith on June 1, 2009 at 9:24am
Hello Juan,

I do not have more pictures. Sorry.

When my engine was new the oil pressure was about 34 psi. Now the pressure is 27. Yesterday my highest oil temp was 221 with an average of 196. The 221 temperature was with an outside temp of 80.

Comment by Juan Vega on June 1, 2009 at 8:46am
do you have more pictures of the process of dis asembly and repair? I have good copm ression on mine but interested in the process. I have 220 hours and after an oil change, the pressure settles at 34 psi. at statt up it is higher at 38 then settles around 34-35. with temp on Oil running around 190 F. what are your temps and PSI running?

Juan Vega you can email direct

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