They are standard thread. Counter-clockwise to loosen.
counterclockwise
It could be that the pulleys may be loose or the belt could be wet or slipping. Or the switch may be bad.
Check the belt and if it isn't that, it could be the PTO. That's under the engine with two wires coming out of it. It will be in route with your blade belt
Zero turn lawn mowers can be either a riding lawn mower or a push lawn mower, depending on you're preference. Push lawn mowers start around three hundred dollars.
battery, solenoid, starter, engines locked up from overheating, or a bad switch (IE seat brake deck blade engagement swithces)
The same as any riding mower. The following is a site which explains how the work: http://www.ehow.com/how-does_4689999_rideon-lawn-mower-work.html
Zero turn mowers are riding lawnmowers. The design and features offered by a zero turn mower do not really translate into anything that would work well for a push mower. Several brands, such as John Deere and Snapper, offer zero turn (riding) mowers that are designed specifically for residential use.
its probly flooded.
Not on a push mower that has no electric start. On a riding mower, yes there is an ignition key.
You can turn it both ways to see how sharp it is.
counterclockwise
counterclockwise