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Hey guys! I would like to ask a question about the cut quality of my JD 320 48" deck. It leaves stripes like the blades are not close enough. I always ude John Deere blades. All spindles are tight. What are your suggestions?? Thanks.

Mow slower,
cut 1 notch lower
replace the blades
or any combination of the above

I found I had to mow a tad more frequently, the problem is not unique to your mower.

thanks mr gill!!!!!!

The 50" deck on my 285 did that, but only when turning too fast

mine does it when going straight

Check the blades.
They should come to within 1/8" & 1/16" of each other and be dead level.
If not the blades are wrong or have been made badly.

Are you at wide open throttle when mowing.

yes sir

Are you using the 1/3rd rule? It's August, I normally have no problems keeping the yard looking tight mowing once a week. Normally, there are some Hot spots I can't afford to take care of with watering. Not this year though. If I go more then 4 days I'll be mowing close to half of the height of the grass and that leaves a buildup line on my mulching deck between the middle and right blade. Normally grass would eject out of the side port but with the Mulching insert in it has to settle back into the grass. With too much grass though it ends up on top.

Now this is just how the grass looks, have you checked to see if it's just discharge or if it's actual grass that's not been cut. Eventually he grass will go dormant and will keep up with it, throw the winterrizing fertilizer on and over seed. Throw the fertlizer on now, you'll be doing a reverse 1/3 rule. leaving only 1/3 of the grass.

The x320 deck must be different from the 48” x324 deck on my 07 cause I cut as fast as the mower will starting in the center and keep blowing the grass to both sides so no clippings left in the lawn the size of my country lawn takes about 1 1/2 hours. This 11 year old machine does a great job. And I have royal purple in the engine.

Towards the end of last year I started noticing a lack of cutting between the center and right blades. I've got the mulching kit in there. Last time I checked the blades were correct height, running true and plenty sharp. I'll give it a good going over before putting it on, probably in the next week as the grass has been creaping up here even with yesterdays dip to 18° F.
Mowing, I have to remember the patterns I found optimal from last year and modify them. I've got a new barn, a chicken coup/run and a pile of dirt from leveling for the barn that's 20 yards long and a good 12 foot high at it's peak. A whole bunch of dirt. Least I won't have to mow that but I will have to get it distributed, hauled off and such, eventually.

The number one reason I see for cut quality problems is a deck plugged up with grass. Gotta keep them scraped clean! The deck should be checked and cleaned if necessary after every use, especially if you are mulching.