I built (ish) a Jabiru UL 450 and now have 260 hours on both airframe and 2200 Jabiru engine.
CHT and EGT are only monitored (at this stage) on two cylinders - no 3 for EGT and no 4 for CHT.
Today I was out jollying around for about an hour. Cruising steadily at 2800 rpm, around 13 litres per hour and EGT on 700 deg C. Suddenly I notice the EGT quickly rising to about 740. There was no change in RPM, fuel flow was steady, CHT steady (around 105 indicated), oil temp 90 and pressure steady. This has happened before, months ago and I have check the induction manifold and tubes, all secure. If there was a problem there I would think it would be more consistent than this apparent spurious reading.
Is it possible that a dodgy electrical connection could cause this? The gauge is a standard VDO display and the sender a K type screw in type.
Regards, Laurie
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