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My lawnmower will crank but when I put release the

My lawnmower will crank but when I release the clutch or put the blade in gear it shuts off.What is the problem. It is a dty 4000, 18 horsepower. It's approximately 6 years old.

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  • nmtaylor Jun 27, 2009

    Thank you for your response to my problem with the lawnmower. I unpluged the safety switch under the seat and plugged it back in and it is working fine now. Again thank you for your help. Nancy

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SOURCE: craftsman snow blade install instructions

Go to sears.com and click on the PartsDirect link at the top. Enter the model number of the blade and you will see a parts diagram of blade. Hope this helps.

Posted on Feb 06, 2009

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SOURCE: engine stalls when clutch/brake pedal is released

Under the seat, there is a operator presence switch, if this switch fails, the mower will shut off when the brake is released, or put in any gear.

Posted on Apr 23, 2009

rwvanlue
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SOURCE: 14sb engine running when blade clutch is engaged

Normally I believe this mower to have a Kawasaki engine, and the main jet and 'pilot air hole' need to be cleaned. You are running a lean condition, and when the blade is engaged, the engine does not have enough fuel to continue the extra load. A small test for this is to engage the blade and the choke at the same time. If the engine has enough fuel to continue running and engage the blade, this confirms the lean fuel condition. Cleaning those jets will solve the issue.

Posted on Nov 08, 2009

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SOURCE: DTY 4000 tractor dies when engaging pto, new

Hi,
This is just a suggestion. Try pulling the choke out about one third to one half and then engage the PTO. Sometimes the air idle adjust screw port gets a tiny speck of debris in it. If with the choke partially out and the PTO engages the just grab a screwdriver and turn the air idle mixture screw counter clockwise a hair.

Posted on Apr 30, 2010

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SOURCE: I have a 15.5 HP Sears Craftsman 42

I'm betting that you need a new safety kill switch - probably the one underneath the seat (the spring-loaded plunger switch that won't let you use the machine without your *** in the seat). Could also be the one behind the "dash" that is associated with the blade engagement mechanism.

I know that the under-seat-switch cannot be bypassed or it will disable the machine in the exact way that you described. Why do I say this? Because I just tried to bypass my own "***-in-the-seat-safety-switch" on my very own 15.5 HP, 42" Sears tractor, and it responded by punishing me - the absense of the switch caused the motor to cut out when I tried to put the machine in gear AND/OR engage the blade. It seems to have some measured capacitance - the absense of same seeming to interrupt the ignition timing enough to shut the motor down when you attempt to get anywhere past neutral or engage the blade. These "safety" switches may be needed by a very few who prefer to be drunk while they mow lawns on steep slopes that their tractor mowers were not designed for, but I find these items to be troublesome and enfuriating. My trees shed a lot of sticks in high winds, and I can't stand shutting the machine down and restarting it EVERY SINGLE TIME I have to dismount to clear sticks or other obstructions out of my mowing path. This is an obnoxious, "nanny-design" feature that desparately needs to be discontinued. It also makes both jump-starting the tractor and electrical troubleshooting much more difficult than they should be. The tractor should let you dismount without shutting down, as long as you have disengaged the blade and shifted into neutral. It should also let you jump start with jumper cables - impossible to do with your rear end in the seat. By the way, call Manufacturer's Supply, Inc. at 1-800-826-8563. They may have a replacement - their item number 31-9664 might do it, but talk to them first. I'm calling them tomorrow. Good luck.

Posted on May 17, 2010

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