The problem I'm experiencing is the mower will die after going for a short period (1-2 minutes) it will start back up but will die within a few seconds. The engine will surge like its running out of gas qwhen this happens. But during the 1-2 min it does run, it's sounds strong. This is an old snapper rider that the model tag has long since faded to white so I can't get a model#. I should say I've replaced the air filter, fuel filter and the throttle cable (it was time for a new cable anyway) and the spark plug. It's been mentioned it could be the coil. Ya think? Also (hate to show my ignorance) but where is the coil?