OS140RX Bearings

[Wayne Galligan]

I have two 1.40RX  and have replaced the originals after 35 in one and 125 in the other.  I replaced the bearings with Bearings Limited and left the seals.  I use no after run and I do run the engine dry.  Cool Power 15%.
I currently have about 200 flights on one bearing and 75 on the other.

After some conversation about after run oil I don't think its good for bearings with rubber seals.  Just my observation that some of the people I know running after run oil with rubber sealed bearings where having issues with the seals swelling or rubbing internally.

Wayne GO

  ----- Original Message ----- 
  From: vicenterc at comcast.net 
  To: discussion at nsrca.org ; discussion at nsrca.org 
  Cc: Scott Anderson 
  Sent: Thursday, June 16, 2005 9:37 PM
  Subject: Re: OS140RX Bearings



  I think Ed is very lucky.  Probably, OS run out of standard bearings and they put an FI bearing in his motor.  It is evident that the common denominator is that you can not get more than 30-50 flights from the original bearing.  My OS 140 RX has more than 300 flights after replacing the original bearing with SS bearing.  Yes, I still run dry the motor and leave the piston in top dead center.

  Vicente
    -------------- Original message -------------- 

    Vincente,

    Ed's motor is NOT the FI..  I fly with him and it's true he just runs out the fuel after the last flight and no after run or anything.. motor still smooth... 

    Scott
      ----- Original Message ----- 
      From: vicenterc at comcast.net 
      To: discussion at nsrca.org ; discussion at nsrca.org 
      Cc: Ed Hartley 
      Sent: Thursday, June 16, 2005 9:29 PM
      Subject: Re: OS140RX Bearings


      Is your OS the FI version?  That could be te reason since that version comes already wint SS bearing.  

      Vicente

        -------------- Original message -------------- 

        > I flew flight number 220 on the original bearings today! I run the engine 
        > dry at the end of the day! Cool Power Pattern 25%. 
        > 
        > Ed Hartley 
        > roho2 at rcpattern.com 
        > 
        > ----- Original Message ----- 
        > From: "Verne Koester" 
        > To: 
        > Sent: Thursday, June 16, 2005 2:35 PM 
        > Subject: Re: OS140RX Bearings 
        > 
        > 
        > > Amram, 
        > > You're probably already on borrowed time. You need the rear bearing for 
        > > the EFI version of the 1.4 which is a sealed stainless bearing. The O.S. 
        > > part number is 29430010. You'll get between 300-500 flights with this 
        > > bearing. The original bearing is usually only good for 3 - 5 gallons of 
        > > fuel. 
        > > 
        > > Verne 
        > > 
        > > 
        > > ----- Original Message ----- 
        > > From: "Amram Private" 
        > > To: 
        > > Sent: Thursday, June 16, 2005 1:45 PM 
        > > Subject: OS140RX Bearings 
        > > 
        > > 
        > >> Hello to all 
        > >> My OS140RX already accumulated 15 hours and I am thinking of purchasing 
        > >> set of bearings to be ready for the days. 
        > >> I heard many opinions on this issue. I'll be happy if those who are 
        > >> experienced will advise... 
        > >> Thanks in advance to all answers 
        > >> Amram Leshed 
        > >> 
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