Bobcat wants to stall when blades engaged

Discussion in 'Mechanic and Repair' started by Long, May 3, 2010.

  1. Long

    Long LawnSite Member
    Messages: 8

    Hey guys I'm new here and could use some of help. I just purchased my 4th lawn mower brand new, which is a 26 hp Bobcat Predator Pro liquid cooled.

    My problem is that when I engage the blades the mower bogs so bad that it pretty much stalls out. When I engage the blades the belts seem to hop around a bit before the blades get going but, when they start spinning all seems fine. I brought it back to the dealer where I bought it and they seemed clueless. They were saying that it has to be break in blah blah blah.. The mower has 20 hours on it now and its still doing it. This is the first mower I have ever had this problem with and this is my second Bobcat.

    Any help is greatly appreciated, Thanks in advance.
  2. davidl79

    davidl79 LawnSite Member
    Messages: 79

    Have you tried to take the belts off and spin everything by hand to see if something is binding up? Maybe take the belt off the deck and leave the belt hoked to the PTO to see if it bogs own. You could also have a bad PTO and when it turns on it draws too many amps until the motor catches up.
  3. pugs

    pugs LawnSite Gold Member
    Messages: 3,025

    Are you letting the machine warm up? What RPM are you engaging the blades at? Never messed with the 26LC model but have seen plenty of 23 and 25 air cooled ones. Unless they are well warmed up, they will not pull the 61" deck if you try starting at very low RPM.

    What sizes are your other machines and what engines are on them?
  4. ncls

    ncls LawnSite Senior Member
    Messages: 442

    Since I'm in Cleveland, and you're in PA, we have the same enviroments. Let the machine warm up. Also, check the spring on the carb, the one that is supposed to allow more fuel to the motor, should it bog down. I don't know the technical term for it, but its on all motors. Make sure it hasn't been disconnected.
  5. premiertx

    premiertx LawnSite Member
    Messages: 40

    I've had the exact same issue with a new mower i purchased. It turned out to be a VERY dirty air filter. When your mower comes under load, it sucks in a TON more air. Clogged filter was not letting the mower get enough air. We mowed a lot in a very dusty location. Check it, it may be the problem.
  6. Long

    Long LawnSite Member
    Messages: 8

    I havent messed with it much my self. I will try this, it sounds like this could be the answer.

    All my machines are 60-61" and 25 - 30 hp besides my walk behind and yes I let it warm. I can mow 5 acres, shut the blades off and it will still do it when i engage them.

    When the blades are spinning and I put a load on the motor I can hear it rev up to handle the load so I doubt this is it.

    I'll check the filter but I'm not sure that this would be the problem. The mower runs and drives excellent. After reading the first post it seems like the PTO is screwed up.

    Thanks for all the quick helpful advise guys. I will take everything into consideration when I go over this mower tomorrow. I'm thinking that it has something to do with the PTO as stated in the first post. If the mower lacked power other than PTO engagement I would think differently, but this mower could pretty much tow my truck and it climbs straight up any hill I put infront of it. I'll keep you guys informed.
  7. webman418

    webman418 Inactive
    Messages: 18

    Try engaging with the choke 1/2 on. Could be running to lean. If it works maybe a problem with the Carb.
  8. Long

    Long LawnSite Member
    Messages: 8

    Sorry I'm so late on getting back to you guys but I've been extemely busy. The problem was that it had the wrong belt on the machine.
  9. Remington4

    Remington4 LawnSite Member
    Messages: 49

    Hello Long,

    Do you know which belt was wrong?

  10. jnt412

    jnt412 LawnSite Member
    Messages: 60

    I would request a new mower from the dealer..

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