Question about Craftsman 17.5 hp 42 in. Deck Lawn Tractor - CA Model

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I have a Craftsman Mower and blades won't engage

I have a Craftsman Mower and when i try to engage the blades they don't turn. I have checked the belt and they are all on track and the pulley that is being driven by the motor is spinning. The belt just wont catch and turn. I have tried using WD-40 on all the pulleys just to make sure they all want to turn. The pulley that tensions the belt also moves into place so at this point i'm at a loss and the lawn continues to flourish wildly.

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  • kseger Sep 28, 2009

    The belt does tighten because the idler moves into place and no grass and blades aren't seized and moves freely. I think it may be that the idler doesn't tension the belt enough maybe??
    when i slide it to engage it does stick a little bit and the stick feels to be more stiff than before..if that makes any difference?

  • Chuck
    Chuck May 11, 2010

    Does the belt tighten up when you engage the blade lever? Have you looked under the deck for excessive grass build up. Have you checked each blade to make sure that it will turn freely?

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  • 389 Answers

Yes, that would make a difference. I have seen the pivot point get rusted and dirty to the point that they wouldn't tension the belt enough. Locate the bolt where it pivots and loosen it just a little, then see if the belt gets tight. It must be really tight when engaged almost like a fan belt on your car in order for it to work. I would also recommend that you take a close look at your belt. It could be burned and have a flat spot since it has apparently been slipping. A flat spot on the belt will cause major vibration when the blades are turning.

Posted on Sep 28, 2009

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