Remove the spark plus and check for congestion. Reconnect wire to plug and hold plug againt metal of engine while someone trys to crank. Look for a spark at the points. Water in the carb and gas tank is the usual problem. Ignition Points corroded is #2. See if you have a round float bowl on the bottom of the carb with a small nut on it's bottom holding it up. If you have one it takes a 7/16 or 1/2 socket wrench to loosen that nut a turn or two and let the bowl drain out. If so when you smell raw gas retighten the nut. Any water will show up as bubble drops -the gas will flow away. don't try to crank again until the gas has evaporated.
It depends on if you bought a pull start mower or a power mower. The pull start mower will have a handle you have to pull hard to start it. The power mower should have a button that simply turns it on. Make sure there is gas in the pull start mower.
starving for fuel
dirty carb bowl or water in the carb
yes.
To start an electric lawn mower, first plug it in and ensure it is connected to a power source. Then, press and hold the safety button or lever while simultaneously pulling the start lever or pushing the start button. This will engage the motor and start the mower.
Blocked air filter, need spark plug replacement,
did you check and make sure you have plenty of oil. or maybe your lawn mower just needs a break.
make sure the gas valve is turned on and you put the air filter in right
your electric motor(I assume) probably wont have enough torque, That is on a Riding type mower, not a push mower, it might work on a push mower as long as its not self prepelled, because your motor probably still wont have enough torque!
There are several reasons why your mower will not start. There could be an obstruction in the blade, a petrol mower could be low on petrol or the fuse could have blown in an electric mower.
replace it
bad bearing