This question is for those that have knowledge / experience with the
Jabiru 3300 engine. A friend has one in a Waiex that has some low
differential compression reads. First I had to sort through his quick
disconnect fitting problems. I got that resolved and my first question
are the reads valid with a .040 orifice in the gauges? Jabiru site
gives no info on this, just a differential read of 25% or 80/60.
General info is .040 orifice for cylinders with less than a 5" bore.
Next question. Are valves a problem on these engines? He has an oil
change in five hours and I suggested he fly it till then as engine runs
smooth and develops full power and we'll check them again. If they get
worse he can take action. If no change and engine continues to run
well, I suggested he remove the heads to be re-worked come late October
when in the first week of November he goes out of action for five months
with a shoulder replacement. He is down for a spell at that point anyway.
Good advise? Bad advise? Who knows advise?
I can, by the way, dust him in my KR with an 0-200 and he has 130 hp.
But that's another story..............
Larry Flesner
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