Navigator extremely sluggish going forward

[CLLM2020]

My 2013 Navigator has a hard time getting moving when going forward and the controls sometimes like to stick when turning. Moves fine in reverse. If left in forward, it will eventually pick up speed but it takes a while. Any ideas on what to check? New hydro oil and filter, release valves are closed, no leaks

 

[slomo]

Need mower and engine numbers. Need a brand name too. Is this a Ford Lincoln Mercury product?

 

[CLLM2020]

Need mower and engine numbers. Need a brand name too. Is this a Ford Lincoln Mercury product?

Exmark Navigator. NV40KC. Engine is not the issue