My mower runs fine for about 20 minutes then starts revving intermittently and shuts down. I let it sit for a while and start it up again, it has started right up, and it does it again. I have changed the spark plugs with no change. Yesterday and today it only runs for about 5-10 minutes and it was hard to start. Any suggestions?
Pull the fuel line off the fuel pump, remove the fuel cap and blow backwards up the fuel line.
If it gets better you have a fuel blockage in the fuel tank.
For fuel to get out, air has to get in and the air behind a ride on is very very dusty.
