I have a brand new Gravely proturn 460 that doesnot seem to be cutting very well. The 1st time I used it it was leaving dandelions completely uncut. The next time I noticed it was leaving grass uncut. Both times the uncut grass seems to be exactly on the middle of the deck. I took it to the dealer & they tried it (with me there) & it cut very nicely. He lowered the deck to 1.75" & it cut very nicely. I had it set @ 3.25-3.5" Anybody have experience with these mowers that can offer a suggestion to improve cut quality? Thanks. Lewis
Did you try sharpening the blades? For some reason, new blades aren't really too sharp. Dandelions are tough to cut anyway but I'd think a brand new zero turn, with the engine running at the proper speed, should have no trouble cutting. I can't imagine anything else being the problem, although it's frustrating. I have a brand new Hustler Raptor Limited and it cuts beautifully.
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Maybe the dealer assembler installed the mower blades UPSIDE DOWN? Don't know if that is possible on all blades but all mower blades are supposed to "suck" the grass up to the blades. Also there are different pitch mower blades that pull more or less vacuum and on some mowers the manufactures have a limit to how much pitch is allowed for their mowers. Maybe your mower has the wrong pitch blades and sharp or not they won't "pull" the grass up to cut correctly?????
The person at the dealer looked at the blades because he thought they would be dull. He said they are very sharp. I've only used the mower 3 times and this last time it was very tall. I will try mowing lower. Maybe about 2.5" and see if it mows nicer. Thanks
I wonder if high lift style blades are available for your mower ? I ran into a similar problem on my old ancient MTD special that I refuse to replace, one blade change I unknowingly got the 'standard' blades and unless the deck was slammed to the ground for the golf course buzz cut it would not cut evenly and could not operate the bagger. Back to the high lift blades and all was good again.
How tall is the grass/weeds? How damp is it? Tall grass/tall weeds will be laid over by the leading edge of the mower deck and will not be pulled up, or spring back up to be cut by the blade particularly where the blade is close the the deck's leading edge.
The question here is how do you know how good a new mower is going to cut the grass? That is a real expensive lawn mower not to be cutting the way you want it! I like to cut my grass tall. You should not have that problem with a good mower! They just don’t make lawn mowers as good as they used to. In fact, I heard that MTD makes the basic decks for most of the makes like Cub Cadet, John Deere, Yard Man, Troy-Bilt, etc. ... at least for the lower priced models. Not necessarily for a zero-turn, but a 46” deck is basically the same one that you see on many lawn mowers with different names that you find for sale at Walmarts, Home Depot and Lowe’s. I’m guilty of going for a cheap lawn mower (Troy-Bilt bought at Lowe’s) and regret it every time I cut the grass. After reading this thread, I’m going to look into different blades to hopefully lift the grass up more. I would hate to spend a lot of money on a new mower and still not be happy with the results.
Of course we really don't know the specifics of exactly what's happening with the OP's mower. But what I stated above happens on several mowers that I've used, even my current zero turn. Even with that, I could not be more pleased with the it. I think it is a matter of expectations. If the mower deck is holding down the bend over grass is it reasonable to expect it to all be cut cleanly the first pass? If I cut a lawn +8" tall and depending on the grass and conditions some of the grass wont get cut for the reason I stated, Second pass in the opposite direction gets the rest of it. The blades are pretty robust and the high lift version broadcasts the cuttings about 12 ft out the chute. Suction and lift are not the issue with mine, IMO.
On my zero-turn mower, the blade speed and the travel speed are not related. The blades spin at the preset speed with the throttle wide open, but I can make the mower move faster then it will cut the grass, especially if the grass is longer. I usually can not run the mower as fast as it will travel if I want all the grass cut the 1st time.
Is the OP trying to travel too fast?
My zero-turn mows pretty nicely set at 4" high, after I finally got the anti scalping wheels set at the proper height. Gene
Thanks for the feedback guys! I'm not sure how the deck is pitched. I asked the dealer what adjustments I will need to make and he said none. I did a Google search as well and came up with quite a bit of info so I must not be the only one. The good news is that with adjustments of the deck pitch and baffles I should be able to fix this issue. I'll update later. Thanks again. Lewis