That John Deere looks solid Sluggish performance might just need a bit of maintenance love. Great to see you reaching outthese machines are built to last with the right care.
When the blades kick on and it bogs down like that, I'd definitely check the deck belt and make sure nothing's binding under there, even built solid like the John Deere Z355E can lose power if hte deck's fighting back.
Yeah I’ve run into that before. Mine slowed down like that when the deck belt was wearing out and the blades were a bit dull, quick check there might save you a headache