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Hi. I welcome any help you may provide on my 1 year old mower.

The mower has started to rev high and then low constantly. The low rev almost cuts off but it doesnt and rev high. This continues constantly.

So I replaced the spark plug, clean carburetor and air filter. This did not fix the issue.

I have a Briggs & Stratton QPT Model 917.375450.

Thanks in advance for any assistance.

Just wanted to update in case anyone else has similar issue.

After doing all the above listed I just looked very well at the carb area and noticed the springs we're weak and not holding like it should. So I went to auto zone and bought a 2 pack box of springs and replaced both springs. Runs like a champ now.

You just have to adjust the new springs.

Thanks