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Weak BBC on Toro 21?

Discussion in 'Lawn Mowing' started by Eddie B, Aug 26, 2005.

  1. Eddie B

    Eddie B LawnSite Senior Member
    from gone
    Posts: 859

    Its an older model, 5hp Suzuki. After the mower heats up, if I dis-engage the blade and engage again, it takes forever for the blades to catch speed to the engine. Any common cause for this? What should I look for when taking it apart?
  2. LawnBrother

    LawnBrother LawnSite Senior Member
    from SW Ohio
    Posts: 867

    I just had my 21" proline repaired for the same problem. It turned out to be a stretched-out bbc belt. I decided to just take it to the shop because I didn't know what the problem was. I think it ran me like $90 or something. My mechanic said it is a pain in the arse to change that belt anyway, so I didn't mind letting him do it. Anyway, that is most definitely the problem, unless the clutch pad is completley burnt, which is unlikeley unless it has seen a LOT of hours IMO. As a side note, while you're in there, its a good time to check the torque on your engine mounting bolts.
  3. Envy Lawn Service

    Envy Lawn Service LawnSite Fanatic
    Posts: 11,062

    It's going to need a new BBC belt and possibly a tension adjustment.

    This repair is really no sweat at all. I did it myself without any instruction and if I can do it anyone can. Get your model number off the back of the mower and go down to the Toro dealer for a belt. Personally, I changed the BBC and the trans belt while I was in there.

    I'll be glad to give you step by step instructions also if you want. This way, it only costs you the parts and a few minutes work.

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