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

2 Answers

Engine stalls when blade is engaged

The engine stalls when I engage the blade and take my foot off the brake. There must be a sensor going bad.

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  • lafield Sep 07, 2009

    I am sitting on the seat. brake on, but in 1st gear with blade disengaged. If I engage the PTO with the brake on, all is well. The minute I take my foot off the brake, with the PTO engaged it sometimes cuts out and other times runs. If I quickly disengage the PTO the engine resumes. I am not thinking it is the seat sensor, but not sure.

  • A Miller May 11, 2010

    This is a universal comment, not necessarily specific to your machine. There is an "operator presence" switch in the seat. I presume you are sitting on the seat when you engage the blade? To run this machine you MUST depress the "brake" (sensor #1) to start and you must remain on the seat for it to run at all. Sensor #2 is in the seat. Even if the "brake" is set the blade (clutch)must be disengaged for you to dismount and keep the engine running. I presume I'm not telling you anything you don't already know to this point. I'd check the seat sensor. It is generally a simple switch. You can short it out to test, but DON'T LEAVE IT IN THAT CONDITION! The switch is there for your safety and the safety of your children!

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I think you have found your trouble. Lift the seat and check the wiring. My Troy Bilt (Old Troy not MTD Troy) tilts forward making the switch and wire accessable.

Posted on Sep 07, 2009

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The best way to check is to run the engine with you on it then lift off the seat and see if the seat sensor is cutting off then put a bag with some weight in it and turn on the engine it should run ok if the sensor is working and lift the back box to see if the sensor works there.. the other cause could be a build up of grass in teh cutter area stopping the blades fron moving this can caus a stall if you get a hose and blast under the cutter guards and make shure the grass shute is clear for the grass to exit this may help to mine cuts out if there is a blockage here and the grass cant get out after it has been cut it builds up at the exit plates.. Hope this works AB

Posted on Sep 07, 2009

  • wayneweb Jun 27, 2014

    After I had run it out of gas and put some more in, the mower would backfire and die. I finally discovered that my three-tear-old grandson had stuffed an aluminum gardening implement into a space in the frame. The mower worked fin when I took it out....

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