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Old 06-30-2020, 06:57 AM   #1
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Uneven mowing


Wondering what might be causing my mower to leave a small strip of unmowed grass towards the middle of the mower deck maybe slightly off center ?
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Old 06-30-2020, 07:08 AM   #2
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Re: Uneven mowing


What mower do you have?
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Old 06-30-2020, 07:43 AM   #3
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Re: Uneven mowing


As blades wear they get shorter.
If you have a 2 or 3 bladed rider the deck is built so the blade cuts over lap, if the blades to short it will leave a gap.
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Old 06-30-2020, 08:29 AM   #4
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Re: Uneven mowing


Yeah i thought of the blades being wore and shorter but it does the same thing with the newer bagger blades as with the older regular blades. The newer bagger blades have only been used a few times they cant be wore and shorter yet i would think.
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Old 06-30-2020, 09:09 AM   #5
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Re: Uneven mowing


A few things that can cause mowing problems:



grass too tall


travel speed too fast


blade (s) installed incorrectly


no blade overlap ( wrong blades )


deck underside caked with old grass cuttings


engine r.p.m. and or blade tip speed less than designed r.p.m.


mulch plugs


deck design


************************************************** *






Edit: Edit:
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Old 06-30-2020, 10:32 AM   #6
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Re: Uneven mowing


Senior Sitizen, , I dont think any of the above are the problem though. Maybe its the blades but sure doesnt seem like it should/would be
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Old 06-30-2020, 10:38 AM   #7
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I would also make sure that the front of the deck is about 1/8 to 1/4" lower than the front (if it's adjustable, and it usually is).

Also make sure the blades are properly sharpened. They shouldn't be razor sharp, they should be just about butter knife sharp. They'll dull too quick if they're too sharp, make sure the correct angle is being kept on the cutting surface. Often times new blades will also need a quick hit with a file to get a good edge on them, my brand new cub cabet had pretty rough looking blades right from the factory.
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Old 06-30-2020, 10:39 AM   #8
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Also check the deck belts, make sure nothing is slipping and the belt and pulleys are good. Pulleys should spin freely without the belt, and belts shouldn't easily slip on the pulleys.

Last edited by Joeywhat; 06-30-2020 at 10:47 AM.
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Old 06-30-2020, 02:05 PM   #9
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Re: Uneven mowing


Forgive my ignorance, but how would a blade get shorter?

I discovered long ago if I mow when the grass is too damp, the mower wheels press the grass down and the mover can't vacuum it up fast enough to cut it so when I was done cutting I had strips of grass taller than the rest.
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Old 08-01-2020, 09:14 AM   #10
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Re: Uneven mowing


yeah, still dont make sense to me. No way to adjust / level the deck, no adjustments anywhere. I give up.
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Old 08-01-2020, 09:34 AM   #11
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Re: Uneven mowing


Quote:
Originally Posted by shirbon View Post
Wondering what might be causing my mower to leave a small strip of unmowed grass towards the middle of the mower deck maybe slightly off center ?
How much do you weigh?
few resi grade mowers have a suspension to handle more than 150lbs
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Old 08-01-2020, 10:12 AM   #12
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Re: Uneven mowing


My last suggestion then i give up too.


Make a simple gauge to precisely check the cutting edge distance from a flat surface of each blade cutting edge. We aren't' getting much information but it really doesn't matter if your mower has 1 blade , 2 blades, 3 blades or 6 blades.


With the mower on a flat surface, ( FLAT and not necessarily level ) with all the tires inflated to specs, each blade cutting edge should only make 1 mark on a piece of Styrofoam + or - about 1/16".



The deck pic should explain blade overlap. If no overlap is the problem things are really screwed up if the mower has the correct blades. Overlap can be checked but that takes a different tool.

As you can see on my gauge why i don't loan my mowers.
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Old 08-01-2020, 10:12 AM   #13
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Re: Uneven mowing


well i am more than 150 but doesnt matter who drives it you get the same results.
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Old 08-01-2020, 10:16 AM   #14
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Re: Uneven mowing


senior citizen, i dont follow you, not sure what i am supposed to do
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Old 08-01-2020, 10:22 AM   #15
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Re: Uneven mowing


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Originally Posted by shirbon View Post
senior citizen, i dont follow you, not sure what i am supposed to do
I just don't know how to explain it any simpler that that. The idea is to determine if each cutting edge is the same elevation from a flat surface.



You can use anything you like that a blade cutting edge would leave a mark on. Try a solid block of Styrofoam just on 1 blade edge and maybe that will give you what we're shooting for.


Edit: Edit:

Last edited by SeniorSitizen; 08-01-2020 at 10:47 AM.
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