what's the deal

Discussion in 'Lawn Mowing' started by SOONERS222, Mar 6, 2011.

  1. SOONERS222

    SOONERS222 LawnSite Member
    Posts: 53

    My mower leaves an uncut strip of grass down the middle between my blades. Blades are sharp and the deck is clean... this happened the last three months of mowing last yr. Thanks for the help
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  2. kilgoja

    kilgoja LawnSite Senior Member
    Posts: 944

    something is wrong...are the blades bent? are they on backwards?
     
  3. grassman177

    grassman177 LawnSite Fanatic
    Posts: 9,795

    as many have asked, it is most likely deck pitch issues or the wrong blades(if they are not the factory ones).; my vote goes for pitch.
     
  4. Southern Pride

    Southern Pride LawnSite Bronze Member
    from Memphis
    Posts: 1,382

    This exact same thread already exists with answers but I can't remember the title, try doing a search.
     
  5. kilgoja

    kilgoja LawnSite Senior Member
    Posts: 944

    yeah check the pitch too...suposed to be lower in the front...check the owner's manual...most say 1/4 inch lower
     
  6. ALC-GregH

    ALC-GregH LawnSite Fanatic
    from PA
    Posts: 7,053

    Check the deck belt. Might be slipping.
     
  7. Grass Shark

    Grass Shark LawnSite Senior Member
    from Zone 7
    Posts: 662

    What kind of mower is it?
     
  8. jiggz

    jiggz LawnSite Senior Member
    from jerz
    Posts: 646

    you have a blade on upside down.. :hammerhead:

    its ok, happens to the best of us lol
     
  9. Magna-Matic

    Magna-Matic Sponsor
    Posts: 828

    Hello All,

    Another cause of uncut grass between the blades of a multi-blade deck is incorrect sharpening.

    Lawn mower blades are measured from TIP to TIP (diagonally). The points actually stick out, and the two TIPS are the teeth of the blade. The natural wear pattern of a mower blade is for the TIPS to become rounded.

    When the TIP of the blade is rounded - the blade is SHORTER therefore there is a larger space between each blade in the deck. This is why sharpening your blades at the proper angle to create a POINTED TIP or TOOTH of the blade is critical. When the TIP becomes rounded - your blade is tearing the grass - and no longer cutting it.

    So remember it is not how razor sharp the blade is, but how pointed the TIP of the blade is.

    Please see this link - for some more infomation and pictures of lawn mower blade geometry.

    http://www.magna-matic.com/pdf/2008_geometry.pdf

    Thank you,
     

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