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Under the seat,there is a button type knob that pushes on the seat safety switch plunger. To get to this switch,the seat has to be removed. There under the seat you can see the white plastic knob holding the safety switch. When you sit in the seat the,the safety switch plunger is pushed in and completes the circuit allowing the tractor to start and run. When you leave the seat the plunger for the safety switch is released and the circuit is broken and the tractor motor quits. This is one safety switch of four switches in the electrical system. Sincerely,Brad Locke
There are many safety switches on a lawn mower. I don't know what brand or year, so the best I can do is a generic answer. There is a safety switch in the seat. If you arent sitting down, it will not run. A safety on the blades. Blades must be off when you start most mowers. Some have a safety on the pedal; must be depressed to start. Some must be in neutral to start. I am guessing the switch you are dealing with is the seat. Some are just under the seat. Flip up the seat and there it is. On some models it is actually inside the seat.
There will be a switch that changes state when you get off the mower. Your weight is supposed to enable the engine to run, and when you get off (or fall off), the engine is supposed to quit. Look for wires to the seat assembly, and look for frayed or broken wires or sharp bends in the wire(s). Good luck!
unless you are sitting on the seat that is what it is suppose to do. There is a stopper valve at the bottom of the carb, it pops up and stops the flow of fuel when you get out of the seat when the mower is running, it could be mal functioning, remove carb bowl and check it out. bowl will be full of fuel, while there use carb cleaner on everything you can spray on. Luck.
Just to help you with your troubleshooting:
You can get off the seat with the engine running if the blades are not engaged and the brake is on.
I also think that you can start the mower without being in the seat, but I'm not sure about that.
First, see if you can jump the seat switch.
Second, I think the discharged battery is a different issue.
All riding mowers have a seat safety, blade engage safety and a brake clutch safety, some mowers have a reverse mowing safety. Seat under the seat, blade and brake you will have to check the linkages underneath, and if there is a reverse mowing one I have seen them near the shifter handle right under the fender.
This is usually caused by either a fuel float that is heavy due to taking on fuel where there is supposed to be an air cavity or.
There is debris in the float needle seat allowing excess fuel to over-fill the float bowl. The float needle has a rubber tip that seats against a tiny fat rubber washer called the seat. If there is debris in between the seat and the needle tip the fuel will NOT shut off causing the symptom you descibed.
If you provide a model number I will look up the inexpensive repair parts that will correct this symptom and provide you with a parts source.
Check your safety switches for proper operation. For example with the brake engaged it is posible to start the mower without a rider, if the seat safety switch is bad, then when you let off the brake it does not signal a rider in the seat and will kill the engine. I would start with the seat safety switch, try disconnecting it and then start and try to mow. If you are able to then you know that is where the problem is.
I would check seat switch. To do this just lift the seat and you should find it there. To test if the switch is playing up, remove the two wires coming out the back of the switch and run a piece of wire between them both. This will create a closed curcuit telling the mower that you are sitting on the seat when your really not. Also look to see if the mower has the deck cutters engaged, they wont start if they're on for safety reasons. Easy to do.
I had the same problem with my Husqvarna. I thought it was the fuel system, but I was told to check my gas cap for proper venilation. When the mower starts to sputter, unscrew the gas cap to let the air flow. If it isn't venting right it will actually pull the gas out of the carb.
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