Is there anyway to increase blade speed on a 42" JD deck?

Discussion in 'Lawn Mowing' started by c3ucwb1, Jun 15, 2009.

  1. c3ucwb1

    c3ucwb1 LawnSite Member
    Messages: 6

    I need faster blade speed to cut and blow clippings into my bagger. Are there any aftermarket pulleys or anything of that sort that I could swap out?
  2. zman2307

    zman2307 LawnSite Senior Member
    from OR
    Messages: 328

    do you really want to be liable for modifying your mower? Buy a commercial mower that's built to run a bagger commercially. It's a whole lot cheaper than a lawsuit from rigging something to work such as overdriving your deck. Not to mention the spindles aren't designed to be overdriven.
  3. 4.3mudder

    4.3mudder LawnSite Silver Member
    Messages: 2,227

    Ya, spindles have a max RPM to be operated at, anymore they will likely fly apart.
  4. Stillwater

    Stillwater LawnSite Platinum Member
    Messages: 4,889

    running blades faster than manufacture spec. is dangerous
  5. Tinkerer

    Tinkerer LawnSite Senior Member
    Messages: 620

    I did that on a Toro Groundsmaster mower I had. All it did was drag the RPMs down on the engine when it was in taller grass. Installing a 1/2" smaller pulley on the mower deck or a 1/2" larger pulley on the engine can increase mower deck speed a lot more than you think. An insurance company can deny a claim in some situations.
  6. LushGreenLawn

    LushGreenLawn LawnSite Silver Member
    Messages: 2,120

    I would not put any money into modifying a residential mower thatr is being used for commercial use. It is going to need replacing before the end of the season anyway.
  7. Richard Martin

    Richard Martin LawnSite Fanatic
    Messages: 14,699

    Just make sure the engine is turning the maximum allowable RPM. It should tell you in your engine's owners manual what the max RPM are. It's amazing how many homeowner type mowers come from the factory not turning enough RPM.

Share This Page