Many of today’s self-propelled lawn mowers have plastic drive wheels and some have plastic drive gears as well.
Plastic does not make the best drive wheel system especially if the drive gear is metal and the driven wheel is plastic.
Carefully clean the wheels and gears with a pressure washer so you will be able to inspect them.
If you are hearing a grinding sound, you will have to remove the lawn mowers drive wheels and find out what the problem is. Look for gears that are worn down on the tops or sides of the gear teeth. If you are finding this condition, you will have to change the drive gear or the wheel or sometimes both if they are in bad condition.
Replace the parts that are bad and that should resolve your drive issue. If it does not, contact a lawn mower repair shop from our Locations page and have them inspect, diagnose and troubleshoot the cause of the problem.
Self-propelled lawn mowers are subject to a lot of dirt and debris that gets into the drive system and proper maintenance will keep your lawn mower running for years to come.