What Causes a Lawn Mower Not to Move

If your riding lawn mower

Why won't my riding lawn mower move forward or reverse?

A blocked fuel filter can keep gasoline from flowing to your mower’s engine in adequate supply, resulting in a lawn mower that isn’t drivable. Damaged or clogged air filters also can prevent your lawn mower from going forward or in reverse simply because the engine will overheat quickly.

How do you fix a seized lawn mower?

1. Take out spark plug.
2. Take PB Blaster or other penetrating oil and spray good amount into spark plug hole.
3. Tilt mower upward.
4. Next day spray again, set mower on all four wheels (level) and let set a few more hours.
5. Spray a bit more oil into hole, try to turn blades/shaft manually.