8 inch stripe longer grass being left?

[outdoorpowermike]

Make and model of mower?

 

[JohnTN]

do you know the name brand of the mower and what is it called or a number of it, meaning like Cub Cadet, yellow horse, something to head us in somewhere of the right direction, the size of the deck, 48,54,60,61, and where is the strip being left, right, center, I have seen some that come from shop that the blade if upside down thus causing

OP says 60 inch deck and strip is on right side.

 

[JoeKarpowski]

I have the 60inch deck. 2024 bought new last summer. I forget the model. I can get if relevant. This issue was fixed last fall under warranty. The tech came out last fall to fix a loose bolt on the steering handles So it wouldn't start. I mentioned to him I waited my whole life to get a good professional grade zero turn and look what it does. My BF bought me this high end model with seat Suspension and everything. I show him I need to make two passes so effectively I only have a 2.5 ft deck. He did something. Problem went away. I probably only put max 20 hours on after the fix. Problem came back again this spring After around another 6 hours. If I make one pass with mower in anything higher than 4 inches I get a 6/8 inch wide stripe that hasn't been cut or maybe partially cut. I replaced blades hoping for a fix. No luck.. now I am supposed to bring it back to shop yet again or pay 150 an hour from when they leave the shop AND 1.30 per miles to have them come out again. So I will need to load on trailer and take it back over. Anyone here have any idea how to fix? Is this something permanent with this mower? I am so incredibly disappointed.

pic but needed to be much reduced otherwise too large

Check the spindle to the blade that's not cutting correctly. Over the years, I've had several that wouldn't spin full speed just before going bad and not turning the blade at all. When that would happen, it would leave a partially cut strip of grass.

 

[Its Me]

whynot, could you post a photo of the mower, even one maybe to routing of the deck belt on the mower, gosh there is enough of us skilled mechanics to be able to solve the problem if we had more information, if it was to come into our shop would be easy to diagnose, probably just by looking, first thing would be to look at the deck routing, is the belt to long, leaving a strip sounds like it might be the belt not getting enough surface contact.