My MTD 849 tractor with an 18 hp B & S doesen't spark when I checked the plugs. I was told by Mowerman to remove the little black wires from coil, where is the coil in series or physically on the motor?

Then yesterday I noticed spark and decided to try and start, it did and I mowed again, shut it off for a while. Tried to start it and it won't.

<moved from Lawn & Garden>

Remove the blower housing, It is a coil that is next to the flywheel. The spark plug wire is attached to it and so is the kill wire which is the little black one.

Make sure you have some relatively strong string attached to the spark plug boot so you can pull it off to stop the mower.

Good point about the removal of the spark plug wire. I always seem to forget to mention that kiss. I prefer a plastic "zip" tie.