Welcome to the forum, KingZeke!
Is this a walk behind or ride on mower?
I'd be suspicious of the crankcase vent/vacuum siphoning oil into your intake. This is just a guess, but it would explain many things, including poor performance.
Has it been difficult to start since discovering all of the oil in the breather? Removing and inspecting the carburetor is a good place to start.
Is this a walk behind or ride on mower?
I'd be suspicious of the crankcase vent/vacuum siphoning oil into your intake. This is just a guess, but it would explain many things, including poor performance.
Has it been difficult to start since discovering all of the oil in the breather? Removing and inspecting the carburetor is a good place to start.