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1. 09:53 PM - Question about High EGTs on a 912 (Les Goldner)
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| Subject: | Question about High EGTs on a 912 |
After flying my Zenith 701 w/a Rotax 912ULS a few hundred miles at 5100 RPM
yesterday I noticed an EGT problem. Toward the end of the flight, with OAT
about 65F at 2000', the EGTs started creeping up to 1620F (the maximum
allowed temp) on one exhaust and about 1590F on the other. It dropped when I
reduced RPM to 4000 or raised it to 5500RPM.
When I noticed this, I looked around. After getting my head out of a clouds,
I also noticed the engine was running on a single mag. I am hoping that this
was the cause of the overheating, although I don't understand why this
should be so.
It's going to be raining here (in N. California) for a few days. Since I
can't fly to check out if running on both mags will bring the EGTs down, I
was wondering if anyone in Rotax land had an opinion about whether running
on a single mag could causing the high EGTs. If you don't think running on
a single mag caused the problem, and you have seen this before, I could use
advice as to how to proceed before tearing the carbs apart.
When I can fly again, I'll report if the mag issue was the culprit here.
Les
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