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Blades engage rough on 48" scag

Discussion in 'Mechanic and Repair' started by gibsonsg311, Mar 9, 2008.

  1. gibsonsg311

    gibsonsg311 LawnSite Member
    Posts: 63

    I have a 99 scag hydro and when i engage the blades there is alot of vibrations. Just pulled out of storage, it started up fine and ran well but then i flipped the blade switch and it just started shaking, bladed rotating and engine didn't die. just doesn't seem right compared to my 36" scag. Im not sure what is wrong. Any suggestions?
  2. nosparkplugs

    nosparkplugs LawnSite Gold Member
    Posts: 3,445

    Are the blades bent/off balance, bad spindle bearing, you did not notice this before storage?
  3. Birdjr

    Birdjr LawnSite Senior Member
    from nnj
    Posts: 451

    the belt could be loose or shot.
  4. TLS

    TLS LawnSite Fanatic
    Posts: 7,940

    Belt sitting all winter taking a memory. Did it smooth out? Run it a while and let the belt loosen up.
  5. gibsonsg311

    gibsonsg311 LawnSite Member
    Posts: 63

    Spindles are fine, blades only been sharpened a couple times. Old belt broke before storing it. I will go down and check out the belt may have tightened up sitting for 4 months.
  6. TLS

    TLS LawnSite Fanatic
    Posts: 7,940

    New belts are even worse for taking a winter memory.

    Blades only sharpened a few times and you already replaced a broken belt? Somethings not right with that. Belts should last for years!
  7. Tharrell

    Tharrell LawnSite Silver Member
    Posts: 2,964

    Bad spindle bearings possibly. Also the belt memory issue. Could also be an idler pulley. Tony

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