OS140RX Bearings

[RCSkyraidr at aol.com]

Just last weekend, I finally had to replace the Boca SS bearings that I put  
into my OS 1.40 RX before the engine was ever run. I noticed the bearing  
roughness after flight number 431. Based on advice from so many Pattern pilots,  I 
never even tried the stock bearings.
 
The fuel was 15% Magnum and the engine was run dry after every  session. I 
used Mobil 1 as an after run oil each time. The rear bearing had  both seals 
removed and the front bearing had the rear seal removed but kept the  front seal 
of course. The front bearing seal was metal, not rubber so I don't  know if 
Mobil 1 would affect rubber.
 
Regards,
Frank Granelli
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