Melting Air Filter ?

Discussion in 'Mechanic and Repair' started by YardApeMike, Sep 5, 2013.

  1. YardApeMike

    YardApeMike LawnSite Member
    Posts: 6

    This is a Stens Inner Air Filter (pn 100-780) off a B&S Vanguard 61000 with 180 hrs since last change. The filter media appears to be melted, causing the holes. Outer filter is intact. I have 3 engines and a Kohler ECV749 with the same problem. Any ideas what might cause this?

    20130905_100533.jpg
     
  2. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Might be vapors off the fuel blend you guys are getting in the northeast...???

    Not really sure...Ive seen it a few times...
     
  3. CorkyE

    CorkyE LawnSite Member
    Posts: 117

    Any backfires on these engines?
     
  4. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024


    ^^^^^ bingo !!!
     
  5. piston slapper

    piston slapper LawnSite Platinum Member
    Posts: 4,240

    Bingo.???
    That filter ain't burnt.....
    A backfire would burn the filter media....wouldn't it.???
     
  6. zspeed130

    zspeed130 LawnSite Senior Member
    Posts: 251

    Last year I noticed the inner filter on my fx801v doing the exact same thing. Would love to hear some more opinions. It worried me when I first saw it but not sure what I can do about it. Has always been noisy as hell since new but runs great . Pushing 900hrs.
     
  7. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Not necessarily Slapper....... The flame from a backfire is contained in the connector hose, But..... The extreme heat has to go someplace under the backfire pressure, So it hits the end of the pre-cleaner and melts the media with no flame marks......
     
  8. zspeed130

    zspeed130 LawnSite Senior Member
    Posts: 251

    Anything to worry about?
     
  9. Restrorob

    Restrorob LawnSite Fanatic
    Posts: 11,024

    Just replace it when you find it in that condition......
     
  10. zspeed130

    zspeed130 LawnSite Senior Member
    Posts: 251

    Yea. Problem is it was hat way 50 hrs or so into the change and progresse from there. Has not gotten much worse or I would have already changed it. It kinda makes me twitch when I think about it! I am picky about maintnence!
     

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