Question about Craftsman 20 hp 42 in. Deck Lawn Tractor - CA Model

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DYT 4000 Lawn tractor won't start

The lawn tractor turns over, but won't start. Getting Spark and appears to be getting fuel. Just seems to backfire through the carb. Had it all apart, cleaned everything but still won't start. Pulled fly wheel and checked and cleaned out coil area. Checked shear pin, everything looks ok. Not sure what else to do. Any suggestions.

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  • tomicamel May 25, 2009

    I have the same situation. 17.5 HP model. Has spark, gets fuel, perhaps too much, and sometimes almost starts. Blows some smoke and cuts out. Ran fine a few days ago. Have replaced plugs, cleaned air cleaner.

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Does it have a manual fuel shut off or a electric selenoid type

Posted on Aug 06, 2009

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I solved the problem after buying carb and fuel pump rebuild kits.The carb kit didn't fit anyway, but didn't need it. The problem was in the fuel filter. I had forgotten the problem happened when I ran out of gas. Inside the fuel filter is a washer held in place by a spring. Without fuel it apparently lost pressure and the washer slipped out of place about 1/2", which was enough to let all the gas through that could. The rebuild kit had a new rubber gasket. I won't let it run out of gas again.

Posted on Aug 11, 2009

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