Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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What is the make of your mower? Do you have your model numbers available?
Thanks for your reply. Have you checked the condition of the belt that drives your transmission. If this belt is worn, or slightly slipping, it can affect the performance of your transmission. Have you noticed any oil leaks on your transmission? We can continue from here.
Have you checked the oil level in your transmission?
If everything is looking ok externally, then you likely have an internal issue with your transmission. The squealing could be caused by either your belt slipping your pulley, or the bearing on your input shaft, could be partially seizing after it heats up.
Yes, you are correct.