SRS,

I'm assuming that the mower is a push variety with a single cylindar... The carb sits on top of the gas tank and there is a little plastic tube that goes down into the gas tanl which feeds a jet (oriface) and when the intake valve opens while the piston is on it's way down the suction pulls fuel into the combustion chnmber to be burned... There is no float bowl... These carbs are purdy simple... The only things that can wrong are (1.) the plastic tube getting clogged or (2.) the jet getting clogged...

If you take the air cleaner off by removing the single screw on top of it you are no looking into the carb... There will be a round opening that the air goes thru... Be sure that the foam rubber air cleaner is clean itself... If it's all crudded up with dust and dirt wash it with varsol or in gasoline itself or buy a new one fir 2 dollars...

If yer going to the parts house buy a can a "sarting fluid" if the mower hasn't been run in some time and take the air cleaner off and spray a short one second burst into the carb with out the choke "on", then choke it and it should start...

If you have replaced the spark plug and tried to start it with the "starting fluid" and fresh gas and it doesn't start then that means that you have no spark which means that you porobably have rust on yer magnito... Rust on a magnito is something that yer prolly not gonna want to deal with cause yer gonna have to take the cover off that has the pull cord in it... They can be a little tricky and if you've come this far and nuthin' then you'd better take it to yer local small engine repair shop...

Hope this helps...

B~