Question about Craftsman 42 in. Deck 19.5hp Lawn Tractor

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Can not get tractor started

Hey, I took out all of the safety switches on my tractor ( a19.0 poular ) and I though that I had wire it back where it made a curent to the igention switch. I have tryed to connect the wires several ways and I get nothing. also I had it started befor I took the wireing off but it spit and spudder and died. any help would be helpful. Thanks to every one who reads this. Steve

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Hi,

Thanks for contacting Fixya.com
If you have only 1 small wire on the solenoid then it is the exciter wire. What is suppose to happen is when you turn the key to the start position the exciter wire recieves 12 volts from the key switch which activates the solenoid plunger which in turn connects the battery cable side of the solenoid to the starter side and then the starter turns. Most of the time it is a safety switch preventing the 12 volts from reaching the solenoid exciter wire.
If you have 2 small wires on the solenoid then the other wire is the ground for the solenoid. You can easily verify this with an OHM meter.

You can also check the safety switchs. Sometimes just unplugging and reconnecting the safety switches will clean the contacts and fix the problem. You should have a clutch/transmission, blade engage and seat safety switch. You may have a couple of more depending on the age of the tractor.
The safety switch in a lawn tractor allows the tractor to shut off if the switch is released. It is composed of a spring component that will deactivate the engine when not set properly. This safety switch is necessary for the lawn tractor to run, and move forward or backwards. The transmission and engine both are wired into the seat safety switch, making it necessary that it be enacted for the tractor to run..
For the safety switch to function properly, it is placed under the seat of the tractor. When the rider is sitting down in the seat, the weight compresses the spring to activate the safety switch, which allows the engine to start and remain running. For some riders this may be difficult and the need for extra weight or an adjustment in the sitting position is necessary to force enough weight onto the spring to keep it compressed. For smaller riders, this can prove difficult. For those with difficulty keeping the tractor running, due to a lack of weight on the switch, a block can be added to the back of the seat to increase the weight pressing on the switch. Other methods are also possible, such as tying a rope to the seat, placing pressure on the switch. This will eliminate the issue, but also raises safety concerns as the tractor will not shut off once the rider dismounts.

When the spring is decompressed and a rider is no longer placing weight on the seat of the tractor, the spring will open back up, initiating the kill of the engine and transmission. This switch is necessary to eliminate lawn tractor accidents where riders fall off, or leave a tractor running unattended. Once the rider leaves the seat, the engine will stall out. This is made possible by the wiring. The switch is hot wired to the engine. The spring, when compressed, makes the connection between wires possible, thus allowing the engine to run.
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Posted on May 30, 2010

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