I would suggest your losing lift with those blades. I can not prove that. Only thing I can say is check the front edge is lower then the back 3/8". Looks like the deck needs welding repair.
That 3/8” higher in the rear doesn’t apply to all brands.Has anyone mentioned the middle blade should be longer. I have a Snapper zero turn, cutting high weeds "dandelions" mostly, making the return cut darn near all the D's were still standing. Finally called factory, they said the mower deck needs to be 3/8" lower in the front. That fixed the problem.
My 472 does that whenever I mow too fast in tall grass. I’ve always had to just go real slow and/or mow it twice. It doesn’t leave streaks when cutting 4-6” tall grass, And, it cuts better at around 3” setting. Just remember, a zero-turn is a finishing mower, not a bush hog. It’s not designed to make clean cuts in very tall grass.Is there a way to fix the problem of grass left uncut between the blades? It is particularly bad between the left and center blade. I removed the relatively new blades (installed about 2 months ago), and rotated them, L to C, C to R, R to L, and I get the same result...2 stripes of grass the entire length of my mowing, which means I have to mow over the same path a second time, but slightly moved to the side to make sure my blades cut the 2 stripes that are left between the 3 blades. The grass between the left and center blade is up to 12" wide, while the grass left between the center and right blades is about 2-4" wide. I have the ProMaster 260.
Keep in mind that they are not always in that position. If that’s how they are synchronized, the when they’re both 90 degrees to that they will miss spots in the center if you go too fast.
The dealer told me he had done all he could do.
Is there a way to fix the problem of grass left uncut between the blades? It is particularly bad between the left and center blade. I removed the relatively new blades (installed about 2 months ago), and rotated them, L to C, C to R, R to L, and I get the same result...2 stripes of grass the entire length of my mowing, which means I have to mow over the same path a second time, but slightly moved to the side to make sure my blades cut the 2 stripes that are left between the 3 blades. The grass between the left and center blade is up to 12" wide, while the grass left between the center and right blades is about 2-4" wide. I have the ProMaster 2
Check that your spindles are good. Pull off your belt and check to make sure there's no bearing noise and they free spin. I had one that would get hot after I mowed a few rows and slowed down that blade. So I thought dull blade or loose belt or that the hole in my old deck wasn't letting it create the suction it needed to lift the grass or something. Pulled my hair out for a couple seasons making sure I cut the grass before it got more than an inch or two otherwise I had to go over a lot of it twice. Check your spindles .Is there a way to fix the problem of grass left uncut between the blades? It is particularly bad between the left and center blade. I removed the relatively new blades (installed about 2 months ago), and rotated them, L to C, C to R, R to L, and I get the same result...2 stripes of grass the entire length of my mowing, which means I have to mow over the same path a second time, but slightly moved to the side to make sure my blades cut the 2 stripes that are left between the 3 blades. The grass between the left and center blade is up to 12" wide, while the grass left between the center and right blades is about 2-4" wide. I have the ProMaster 260.