However if it keeps surging while youre using it like going up and down or even dies then you have every reason to be concerned. The carburetor might be clogged. How To Stop Your Lawnmower From Surging Or Not Starting Or Starts Then Dies Mower Surges Youtube My Lawn Mower Starts then Stops. Lawn mower surges then dies . Ad Find China Manufacturers Of Lawn Mower. No matter what I do to the chokethrottle. Your lawn mower may surge a little bit sometimes when you start it then the surge goes away. Other possible causes include. The spark plug is really a very simple device. If your lawnmower starts up but then dies in the middle of mowing your lawn you could have a bad spark plug. I have a Bolens lawn mower it was working fine last week but now today it only runs on the surge produced on start up when the primer bulb is depressed. Then I took out the air filter no change. A clogged carburetor is most commonly caused by leaving fuel in the lawn mower for a long period...