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Problem with running doubles

Discussion in 'Lawn Mowing' started by subdube, Sep 7, 2003.

  1. subdube

    subdube LawnSite Member
    from NC
    Posts: 41

    I put double standard bobcat blabes on for the first time a couple of days ago. They cut very well but i got covered with grass. The grass was comming over the front of the mower. Should i go with a gator and a standard blade or two gators. The mower is a Bobcat walk behind 48'' cut 15 HP.
  2. Likestomow

    Likestomow LawnSite Senior Member
    Posts: 997

    Double high lifts has never worked well for me. For the top blade I use either a regular Gator (fall leaves) or a "reverse" Gator (the rest of the time).
  3. subdube

    subdube LawnSite Member
    from NC
    Posts: 41

    likestomow what is the difference with regular or reverse gators on the blow back? which on top?
  4. Rustic Goat

    Rustic Goat LawnSite Bronze Member
    Posts: 1,194

    sub, sounds like 'blow out', increased lift causing cuttings to be air blown out from under deck. What's your deck pitch?
  5. subdube

    subdube LawnSite Member
    from NC
    Posts: 41

    Rustic, I don't understand what you mean by deck pitch. It is a 48'' fixed deck. The front of the deck is straight down pointing to the ground. Is this what your asking.
  6. heybruck34

    heybruck34 LawnSite Senior Member
    Posts: 300

    Deck pitch is the slant from the drive wheels to the castor wheels. I believe the correct pitch should be about 1/2 inch. This means the front of the deck should be lower by that amount.

    My 48 Scag has blow-out when I run doubles. I have found that it is minimized by running the following combination.

    On the left side (non discharge) I put a standard blade on the bottom and Gator on the top. Same for the middle spindle. Then on the discharge side spindle I put a super-highlift and a Gator. For me- this combination really shreds the leaves, doesn't cause TOO much blow-out and the super high lift blade really disperses the clippings very nicely.

    I think the "reverse" Gator they are referring to is a blade sold by J-Thomas. The Gators are slanted one way at a 45 degree angle but I think J-Tomas blades are twisted the other way. I don't know if it makes a difference- I have never run the TRUE Gator blades.
  7. subdube

    subdube LawnSite Member
    from NC
    Posts: 41

    Thanks heybruck34 i will try that combination and for the deck pitch that is about what i have just by looking at it.
  8. Doc Pete

    Doc Pete LawnSite Gold Member
    Posts: 3,469

    Both my Bobcats were pretty bad with blowout running doubles. In the summer I really got covered with dirt. As I remember the Gators weren't to bad. You can also try low lift blades.
  9. TRex

    TRex LawnSite Senior Member
    from DFW ,TX
    Posts: 487

    I am running doubles and have thet same problem with my metro hp. It has the exmark mulch blades on the top an the high lifts on the bottom. I know you guys will probably tell me to run some gators but I would like to here some other options.
  10. subdube

    subdube LawnSite Member
    from NC
    Posts: 41

    Switchless are you still running doubles and if so are they both gators.

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