Most of the time this is caused by a bad safety switch. Most riding mowers have at least three safety switches.
1) The clutch/brake pedal. (it needs to be down to crank the motor)
2) The seat safety (You have to be seated to run but usually it will crank and start without this one causing trouble)
3) The deck height lever. (it usually has to be all the way up)
4) There may be a fourth on the shifter. (it usually has to be in nuetral)
If any of these go bad they could cause your problem. My guess would be the ckutch/brake switch.
Not on a push mower that has no electric start. On a riding mower, yes there is an ignition key.
Generally the ignition switch activates headlights on a riding mower and the start position only send current to the starter solenoid. If you turn the key and the engine cranks over than the lack of spark is going to be something else. If it is a riding mower you will have several safety switches to prevent start up under unsafe conditions.
Depending on what model mower you have, there could be several problems. But, start by checking the fuse. Most mowers have a fuse that is located near the starter solenoid.
If it is a riding mower it may have a blown fuse. They are usually located near the solenoid.
I assume you are talking about the starter solenoid: Follow the positive battery cable from the battery - the other end will be connected to the starter solenoid.
Find your model number and look for wiring diagram at sonnysbolens.com
Sounds like a bad ignition switch. It could also be a bad starter solenoid. If you can find the solenoid you can unplug one of the small wires while it is trying to crank over and see if it stops. If it does it is probably the switch. If it doesn't then it is probably the solenoid.
Here is a link to a store that sells them. There is a good picture that you can use to identify the solenoid. http://www.ecrater.com/product.php?pid=3160204.
I assume you mean a starter solenoid. Look at how the old one is hooked up. Put the new one in that way. ...and disconnect the battery first.
Like any power switch you have Power in, Ground, Switched Power out and the Switch Terminal.
The safety switch to start the motor on a Ranchking riding mower is located in the ignition. If the clutch needs to be depressed several times before the mower will start, there might be a problem with the adjustment of the clutch.
Can I do it myself, set the timing on my riding mower.