FWIW I'm pretty sure this will be due to blunt/poorly gapped mower blades.
Have tightened it up, which has helped. But needs a proper grind I'd say.
This is a rather common issue with badly adjusted reel / bedknife clearance, thus bending and burning the plant. I developed this symptom on my 17 inch Scotty over Christmas and thus had to get my 14 inch machine out of hibernation which is in better working order. I've recently just overhauled my 20 inch machine and that's a wonderful toy to use opposed to a 14 inch machine.
Cheers, BB.
I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.