Put oil directly into the cylinder chamber. remove spark plug wire & spark plug. put oil in chamber & slowly turn the blade trying to free the engine piston.
Your probably looking at an engine disassembly. Its probably locked up due to lack or problems with oil flow. You need a better description for a better answer. But in most cases people consider a new car. Consider it yourself
I'd suggest reposting your question with more detail. It's difficult to determine whether your engine has seized due to lack of oil, whether your alarm system has locked out the starter, something in between or none of the above. Maybe you can't get the hood open?
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.
Lack of compression
When an engine dies a few moments after it starts. it is usually due to lack of or too much fuel. Look for a dirty/clogged filter (fuel and air).
Lack of water in you engine block. Lack of oil in your engine block. Can cause piston siege.
That will contribute to an engine overheating, since a lack of lubrication leads to friction... lack of oil will end up destroying the engine, as well.
Usually lack of oil or somebody put something in the gas.
The most common cause of engine lockup is a lack of oil. Also, an engine overheating from lack of coolant can cause an engine to lock up.
It depends on how they got locked up. If seized by lack of oil put diesel fuel down the cylinder holes and let it sit. Take the heads off and drive them out with a piece of wood and a hammer but be careful not to break the cooling fins, if you are going to use the cylinders again.
A mower may start to steer hard from many things: -Flat/soft tires -Lack of grease on the front axle or front axle joints -Lack of grease on the rack/pinion gears -Lack of grease on the steering wheel bearing -Crack in the axle itself, allowing the corners of the axle to move I have had all of these happen to me and they are relatively quick to rule out.
Lack of coolant, lack of coolant flow, air in cooling system, lack of airflow over radiator,........