Finally fixed my mower, but do mulching blades just suck?

BigToque

Lifer
Oct 10, 1999
11,700
0
76
I finally got my push mower working, and I bought a a new blade for it (the original blade was nowhere to be found). I decided on a mulching blade.

Perhaps I'm clueless and the blade is working as it should, but why does it seem like the blade is terrible. The grass does not have a clean cut, and some of the grass is not cut at all.

I double checked that I installed it correctly. The blade has "Bottom" facing the ground.

Any ideas? Should I go buy a normal blade?
 

Kanalua

Diamond Member
Jun 14, 2001
4,860
2
81
Are you mowing while the grass is wet? Early in the morning with dew still soaking the leaves?
 

BoomerD

No Lifer
Feb 26, 2006
65,602
13,980
146
I finally got my push mower working, and I bought a a new blade for it (the original blade was nowhere to be found). I decided on a mulching blade.

Perhaps I'm clueless and the blade is working as it should, but why does it seem like the blade is terrible. The grass does not have a clean cut, and some of the grass is not cut at all.

I double checked that I installed it correctly. The blade has "Bottom" facing the ground.

Any ideas? Should I go buy a normal blade?


Do you have a "mulching mower?"

If your mower wasn't orignally built to mulch the grass clippings, (the difference is in the deck...designed to hold the clippings longer so they can be cut several times before they're dropped to the lawn) then a mulching blade isn't going to work as well.

My old Craftsman mower was a mulching mower, but didn't do a very good job IMO. My new Honda mower does a fabulous job. Clippings come out about 1/2" long max. Those work into the soil very nicely.
 

Sniper82

Lifer
Feb 6, 2000
16,517
0
76
im by no means a expert with mower blades but either your mulching blade needs sharping or you need to buy normal blades. I've seen brand new blades that require sharping.
 

BoomerD

No Lifer
Feb 26, 2006
65,602
13,980
146
im by no means a expert with mower blades but either your mulching blade needs sharping or you need to buy normal blades. I've seen brand new blades that require sharping.

I've always sharpened new mower blades. They come from the factory dull as hell.
 

superccs

Senior member
Dec 29, 2004
999
0
0
Ditto on the keep em sharp comments. You want to cut the grass not maul it in to wads of dung. :p
 

dullard

Elite Member
May 21, 2001
25,759
4,281
126
Keep it sharp, and cut it frequently. Mulching blades don't work well if it has to cut off more than about an inch of grass.
 

PingSpike

Lifer
Feb 25, 2004
21,754
599
126
Yeah, my mulching option works like shit too. But it obviously has to do a lot more work so its not much of a surprise.
 

boomerang

Lifer
Jun 19, 2000
18,883
641
126
You've got the blade on upside down. The grass is being beat to death with the backside of the blade versus the sharp side.

Many, many, moons ago I was a lawnmower mechanic. We saw this quite a bit.
 

PsiStar

Golden Member
Dec 21, 2005
1,184
0
76
what boomerang said sounds like the issue, and with mulching mowers you should mow more often & at ~2" height or a little more to avoid clumps & have healthy grass
 

BigToque

Lifer
Oct 10, 1999
11,700
0
76
You've got the blade on upside down. The grass is being beat to death with the backside of the blade versus the sharp side.

Many, many, moons ago I was a lawnmower mechanic. We saw this quite a bit.

So it's possible they etched the word "bottom" on the wrong side of the blade?
 

angminas

Diamond Member
Dec 17, 2006
3,331
26
91
I bought my mulching mower at Lowe's about eight or nine years ago and I've never regretted it. The clippings DISAPPEAR, even from tall grass. I'd have to go out in wet bare feet to find them. I will never, ever buy a non-mulching mower again, though I will get a more powerful one next time. Since the mulching process cuts the grass multiple times, it needs a bit more oomph than a normal mower, or you have to go more slowly.
 

Fern

Elite Member
Sep 30, 2003
26,907
174
106
Do you have a "mulching mower?"

If your mower wasn't orignally built to mulch the grass clippings, (the difference is in the deck...designed to hold the clippings longer so they can be cut several times before they're dropped to the lawn) then a mulching blade isn't going to work as well.
-snip-

This ^

If your mower has a side vent that is blowing the grass clippings out it probrably isn't designed for mulching.

Some mowers have a mulching option, but they come with a special piece that blocks the clipping vent. Otherwise the cut grass 'blows out' before it can be mulched.

Fern
 

Fern

Elite Member
Sep 30, 2003
26,907
174
106
So it's possible they etched the word "bottom" on the wrong side of the blade?

Look, if you're not sure about the blade being on properly -

1. Unplug the spark plug.

2. Prop mower up so the blade can be seen

3. Have somebody pull the start cord (slowly) so you can see the direction the blade turns. Confirm the 'sharp edge' is leading (oriented correctly)

It should then be easy to confirm the blade is installed properly.

BTW: What was wrong with it (referring to your previous thread when teh pull cord was stuck)

Fern
 

angminas

Diamond Member
Dec 17, 2006
3,331
26
91
Don't tilt it too much, though, or gas could leak out. And don't tilt it toward the spark plug, or oil could get into the cylinder.
 

Kirby

Lifer
Apr 10, 2006
12,028
2
0
Whatcha doing with that lawn mower blade Karl?




I aim to kill you with it.
 

Fritzo

Lifer
Jan 3, 2001
41,920
2,161
126
I would be sure that you definately have the blade on the right direction. Mulching blades should chop the grass into tiny bits so you don't have to bag it.