Outdoor Power Equipment and Small Engines - Toro Riding Lawn Mower will not start!!!

I usually mow with my riding lawn mower on full throttle, but one day I mowed it using a slower throttle. I turned the engine off, but when I tried to start it again, it did not start. It just made a cranking noise and failed to start. I looked at the manual and it said to always have the throttle on full when using the riding lawn mower. What is the problem? Why won't my riding lawn mower start? Is it the battery? How can I fix it? Thank you for your answers!

Try changing the spark plug. By running it at the slower speed, you most likely fouled the plug. These engines are made to run at full throttle when working. You get the most horsepower and torque at full throttle.