Lift issues with the new 21" mower

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  • Updated 4 years ago
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This conversation has been merged. Please reference the main conversation: Lack of sucking power (vacuum) on LM2012SP mower

I've cut my tall fescue lawn with the 21" sp mower to full height a few times.  Now that my grass is in full growth and thick, I am seeing something I did not see earlier in the year.

I cut my lawn 4 days ago and I was out pulling weeds and noticed that most of my grass is now lying down and getting matted altogether.  Practically none of it is actually standing as if it had been clean cut. 

I know I thought the mower did a better job with lift from the last version but I just don't know at this point.  I am cutting at the highest setting but I don't think it should leave my tall fescue lying down as if it had been steamrolled. 


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Posted 4 years ago

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David Cline

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My first thought is that the highest setting on the 21" mower is half an inch higher than the top setting on the 20", so that may completely account for the difference you are seeing. You could do a more direct comparison of the lift by dropping down to the 2nd highest setting on the 21".

It's been a while since I've had a fescue lawn, but I don't recall keeping it cut that high. Using the guideline of taking off 1/3 of blade when you mow, that would mean letting it grow to 6" and then cutting back to 4". I know the fescue we had was too soft to not flop over with blades that long, but I'm not sure about other varieties or in different growing conditions.

I'm not sure I can tell any real difference in lift between the 20" and 21", but the 20" was never great at sucking up wet leaves. Even if the 21" is a little better at generating lift, it still probably isn't enough to pull a soft, bent 6" blade of grass completely tight to perfectly cut off the top 2" and leave exactly 4" of every blade.

I'm guessing the grass blades sort of wave around and get cut down to between 4-5" and the longer ones still flop over after cutting.
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My grass is pretty soft so that may very well be it. I was not able to cut it as high last year because the first mower didn't have enough height to do so.

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