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I have a Craftsman Lawn tractor. Blade leaves grass uncut.

I have a Craftsman Lawn tractor.
When mowing, the right blade does not cut
clean, leaving a row of grass at the center
of the blade. This means I must mow twice to
get that. I have tried different blades, and
sharpened ones, and a new blade belt. Still
leaves that row of grass.
Thanks
Tom

Posted by on

  • Chuck
    Chuck May 11, 2010

    Is it leaving a strip BETWEEN the blades or at the center of only one blade?

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  • Master
  • 496 Answers

Hi Tom,
Check your spindle shafts for loose play. If your bearings are worn out and sloppy, the belts pull the spindle to one side and an angle cut results... close cut grass at outer edge and high in center will leave this grass trail you are describing. I'd replace the bearings next year for sure.
I hope this helps... Good luck!

Posted on Oct 05, 2009

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Posted on Jan 02, 2017

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1 Answer

I have a Craftsman SL3500 42" riding lwan mower. the two blads make uneven paths ans the left blade makes a cut about 1/4" lower than the right blade. What do I do?


You should be using a up lift blade it will help by sucking up the grass to be cut. You should have an adjust on both sides of the blade deck . As for the strip check to see if you have a wheel behind the mower deck. If you do it might be the cause for mower leaving a strip uncut . Sears has been noted for putting wheels in the path of the blade area and smashing the grass down . That is also why I suggest to use an up draft blade it should **** the grass back up again so you can cut it.

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I have 11 years old Murray (42 inch deck). After deck adjustment still leaves uncut portion of the grass between blades. Should I exchange the blades (I have not done it for many years, but I sharpened...


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It leaves the center uncut


i think i would raise the whole thing up on jack stands and take a look at the bottom of the deck. do not start it of course, but the problem should be evident. 42 inch generally means only 2 blades which are cutting on the outside leaving you a mohawk. so something is blocking the grass from being cut in the center. if it is by chance a 3 blade deck , then something is wrong with the center blade, if it is there i would guess a broken key.

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Why does a craftsman 42in lawn tractor leave a uncut streak in middle


Hi there,

Is the uncut portion roughly 10-12" wide? Burning rubber smell? Screaching?

Chances are the middle blade isn't spinning.

Shut everything down. Key out.

Check for obstructions. Above and below. Blade and pulley.

If none, you're going to need to break it free. A piece of large bore PVC can be fit over the blade for leverage and safety.

Clear and grass or debris from the pulley shaft. You know, all the normal stuff.

Then try it again

Best regards

Mike 4a8b0f7.gif

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THE answer that FINALLY worked for me. Torque the bolt that holds on the blade to the recommended torque specified in your owners manual (for my Exmark this torque is 120 ft-lbs). When I first used the torque wrench, i was quite surprised by the amount of addional force I needed to apply to reach 120 ft-lbs Exmark blades have a round blade hole with a washer and therefore, relies only on friction provided by torquing bolt to the proper torque to prevent slippage so that the blade rotates at the same speed as the spindle. When slippage between the blade and spindle occurs, blade tip speed slows leaving uncut grass.
Note: this solution will NOT work for mowers with a blade and spindle design which uses a positive means (e.g., a star shaped hole on the blade) that assures the blade rotates at the same speed as the spindle with no slippage.

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It helped my problem/ I hope it will help yours too!

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