OK, this might be the first time I have ever posted in the R-12 forum…. But I just don’t have much experince in working on Rotaxes (except in my old jet ski days), and I have a neighbor with a problem in his -12 that has the whole airpark stumped.
For several months, on numerous flights, he has had his oil pressure indication drop to zero after some time in flight. He has changed out the probe with a new one, and has the same symptoms - good oil pressure until sometime in flight, then it drops off to nothing. He’s pretty well convinced that he still has oil pressure, because the engine has eaten itself yet! We haven’t put a mechanical gauge on it, because we haven’t started throwing metric parts and fittings into the tool box.
Now here is where it gets weird. About the same time, his right EGT has started to go high after “some time” in flight. He swapped probes (left to right) and the problem stays with the side (right). he told me that “the spring on the exhaust looks liek it has gotten very hot at some time” - which makes me think he really does have an EGT going high on that side. Carb problem that manifests after the engine has ben running awhile? Induction leak that manifests itself after the engine has been running awhile?
He’s ready to start chasing the problems up into the “magic box” or the Garmin EIS….but I think he’s got a real EGT issue and I have no idea about the oil pressure.
I’m stumped - let’s hear from you experienced Rotax types!
Paul
For several months, on numerous flights, he has had his oil pressure indication drop to zero after some time in flight. He has changed out the probe with a new one, and has the same symptoms - good oil pressure until sometime in flight, then it drops off to nothing. He’s pretty well convinced that he still has oil pressure, because the engine has eaten itself yet! We haven’t put a mechanical gauge on it, because we haven’t started throwing metric parts and fittings into the tool box.
Now here is where it gets weird. About the same time, his right EGT has started to go high after “some time” in flight. He swapped probes (left to right) and the problem stays with the side (right). he told me that “the spring on the exhaust looks liek it has gotten very hot at some time” - which makes me think he really does have an EGT going high on that side. Carb problem that manifests after the engine has ben running awhile? Induction leak that manifests itself after the engine has been running awhile?
He’s ready to start chasing the problems up into the “magic box” or the Garmin EIS….but I think he’s got a real EGT issue and I have no idea about the oil pressure.
I’m stumped - let’s hear from you experienced Rotax types!
Paul
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