Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Remove the air filter and see if the choke plate is opening, you may have stuck choke, flooding the engine.
Do you have the owners manual? What is the model number of the mower? It will show the air filter.