I put gas in the mower and pushed the gas button like you are supposed to prime it ,. It don.t seem to be getting any fire to the plug. so i changed the plug and still nothing

Did you clean the fuel jet in the carb? If not that could be the trouble.
Pull the spark plug and put a spoon full of clean gas in the plug hole and put your plug back in and hook up the plug wire and try to start. If it fires up and stalls right after then you know you have a fuel problem. Is your primer bulb working? Sometimes I prime my one engine twenty times before it will run. Worth a try. Make sure you are using fresh gas as well.

you do not state whether this is a push mower or a lawn tractor, if it is a tractor could be fuel pump issue, for push or tractor mower fuel sediment or dirt plugging carburetor jet and or passages.

There could well be a build up of sediment and debris in the main jet to the carburetor. It is easy to get to and clean. It is the brass bolt that holds the lower float bowl onto the main body of the carburetor. To clean it, drain your gas. Remove the bolt and external washer UNDER the carburetor bowl. Clean out the bowl of any sediment and/or water. To clean the brass bolt, use no metal objects. Carb/Choke aerosol spray cleaner will do the job. Pay close attention to the hole in the bottom of the bolt and the very small holes about 2/3 of the way up the bolt. Clean till shiny with holes cleared and reinstall. Your fuel flow problem and shut off condition may be solved.

Pull the air cleaner of to see if fuel is getting to carburetor. If it is then see if its getting fire to the plug by taking out and put the wire back on but be careful not to hold the wire or the plug if fire is week then get a new plug or get a new one and see it that helps

I got a new air filter for mine today, plus cleaned out the metal fuel canister under the carburator and the little brass bolt and my mower started right up. I was having hte same problems getting my mower to run and stay running. Glad I checked this site!

Replace the air filter. Remove the plug and try to start it. If you don’t smell the gas your problem is fuel. Most have a primer button that needs to be pressed 3 times. Remove the air filter and press the primer button to see if you squirt fuel. If it has no or little smell, continue priming and starting until you have fresh fuel. Replace the filter and plug. Disengage the pto ect ( saftys)before starting. Here is the manual Don’t forget to follow the safty startup list.
http://www.dixiesales.com/ipl/339/13ax60rg744_operators_manual_02_22_06.pdf

Take spark plug out ,put sparkplug wire on plug and let it lay against block. Watch to see if plug fires. If not change coil. Hope this helps.

How old is this mower?
They stopped using points on lawn mowers some time ago.
When they had points on them, they were under the flywheel.
You will need a puller to get the flywheel off.

Does it start or fire when you pour some gas in the carb.?
Could have lost it's prime, meaning, the gas evaporated from the primer bowl of the carb.
Take the air cleaner off and pour a small amount of gas into the carb. Replace the air cleaner and try to start it.
The diaphragm/fuel pump and gasket dry out also, they are about a $4-$5 dollar part if it is a Briggs&Stratton 3- 4 horse, which I am assuming is on your mower.

i dont understand the pulling the button - do you mean push the primer button - if you mean primer button it sounds like the high speed jet in the carb is dirty and needs service- you can attempt to start and once engine fires have someone continually push primer to keep running it ma clear the blockage - did You check the fuel tank for any water ?

sounds like a plugged high speed jet in carb - you can attempt to prime again , push at least 7-8 times - once it fires continue to push primer to keep running - it may clear out the carb if this doesnt work the carb will need to be removed and cleaned