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While leaded fuel will quickly ruin an O2 sensor for its intended use in controlling an automobile's fuel CPU, that is not true for using it as an Air/Fuel Indicator. I typically get over 150 hours with an O2 sensor using 100LL 99% of the time, before it slowly becomes unusable for that purpose. I am on my second O2 sensor and approaching 360 hours flight time. The sensor appears to gradually loose its sensitivity and responsiveness to changing air/fuel conditions. Now this pertains to the older (standard) narrow-band O2 sensor, I have no experience with the newer (more accurate and more expensive) broad-band sensor.
FWIW
Ed
----- Original Message ----- From: "Jeff Owen" <rotary@jeff-owen.name>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, December 29, 2006 12:19 AM
Subject: [FlyRotary] Re: Yet another non-event story
Buly,
Are you using 100LL? Leaded fuel will kill O2 sensors quickly.
If you are running leaded fuel save yourself some wrenching time by changing
the O2 sensor first.
Jeff Owen
During the flight I noticed my mixture bar was going from lean to
totally desapearing. Turning the knob to full rich was not enough. So
I have to do some more tuning.
Bulent "Buly" Aliev
FXE Ft lauderdale, FL
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