Question about Craftsman 42 in. Deck 19.5hp Lawn Tractor

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White smoke coming out of mower

My craftsman riding mower runs fine until you engage the blades. It will mow for awhile then start to die and white smoke comes out of it. Can you help?

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  • DOCHOLLIDAYDDS
    DOCHOLLIDAYDDS May 02, 2016

    I know this is late, but reviewing several problems..... remember, excess gas burns black, oil burns white. Probably bad rings on the piston

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It sounds as though you are losing power (electrical power); see if charging the battery fully allows it to run longer or if charging the battery helps.

Posted on Jul 16, 2010

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I have a craftsman mower model no 917.28922 that blows blue smoke after engaging blade and is using oil..maintained and kept very clean after every use...what should I check, has new spark plug.


If your maintenance did not include changing oil each season that made the engine wear out sooner. Clean on the outside does not help the inside. You can get a price on rebuilding the engine but I have a feeling that you can replace the mower for not much more. Use it till it dies if you plan to replace it.

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Hi,
So now, without the blades engaged, it smokes and then dies?
In your first description it sounded like the engine was under a strain. Overfilling with oil could produce a strain, but since it ran ok until you said you engaged the blades, I would have to ask if the blades themselves, were causing the strain. Sometimes if you cut wet grass, the clippings stick to your underside of the deck and can really build up. Also some rope, wire or twine would around the spindles could creat one. Check this out...
Now, with the "smoke" issue (I'm assuming a blue smoke from burning oil) I'm inclined to think your rings aren't compressing any longer and you're burning oil. You might be in for a rebuild... I hope not.

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