So you just put some fresh gas in your lawn mower and it refuses to start when you pull the cord. You pull and pull and pull and it still won’t start or it may sputter a little. But how can that be when you just put fresh gas in your lawn mower?
Well, it could be that your lawn mower sat all winter long and the gas that is in it has gone bad. The gasoline with ethanol in it today only lasts about 90 days before it starts to go bad. Once it goes bad in the carburetor, it begins to plug up the idle and main jets and then the lawn mower is not going to run at all or barely run.
A mixture of fresh and bad gas doesn’t solve the problem either. It will still cause the same non starting problem and you will be pulling until your arm wears out and have the same results. The carburetor must be removed and cleaned and all gas emptied from the system and fresh gas added before you attempt to start the lawn mower once again.