Question about Craftsman 20 hp 42 in. Deck Lawn Tractor - CA Model

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How do I get my mower deck set properly? Any tricks?

After mowing grass is cut uneven. Blade was bent. Bought new blade set and mowed the next week. Again, lawn is cut uneven-yes, blades are installed correctly-grass side down on ech blade.
I put a new mulching blade set on mower -was not a mulching blade before. is this an issue?
Checked shaft blade is connected to(mandel) it is not bent-bearing are tight.
I checked mower deck measure.
Front of mower deck is same measure on both sides-in front of mandel.
Back is weird. it is a little more than an inch higher than the front on the left. The right grass shute side has more of a difference about an inch and a half. When I cut the grass the left cuts lower than the right.


How do I make my mower deck level?

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Check your front tire air pressures







Posted on Jul 26, 2009

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Check BOTH front and rear tire air pressures!

Posted on May 22, 2016

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3 Answers

For some reason, I'm getting a strip of semi-unmowed grass down the center of my deck cut. Last fall, I had new spendles put on the deck because I hit a stump in high grass. I mowed fine, bvut when I


Are you using the correct size blades. They should nearly touch each other as you rotate them by hand. Also are they attached the right way up. Look at them and the sharp cutting edge should be stained from the grass.. If not turn them over.

Jun 21, 2014 | Craftsman 21 Hp 42" Deck, Ys 4500 Lawn...

3 Answers

My mowers cuts uneven I replaced the blades but it still cuts uneven how can I level it?


Park mower on a level flat surface ( a concrete garage floor is ideal ) lift deck up until you can put a piece of a 2x4 flat underneath the deck and lower deck until it just contacts the 2x4. loosen adjustment nuts or turnbuckles and adjust until the deck just starts to clear the 2x4. this should level your deck. Now , lift the deck and remove the 2x4. put blade height lever on a known cut length and with a tape measure, measure the tips of the blades from the floor to the blade tip...they should all be the same within 1/8 of an inch...if not then you either have a bent blade, bent spindle shaft, or spindle bolts are loose or misaligned. Your deck could be warped too...depending on how hard a lick it took...good luck !!! ;-D

Jun 24, 2010 | Craftsman 20 hp 42 in. Deck Lawn Tractor -...

1 Answer

The riding mower doesn't cut evenly...one side cuts higher than the other...


The following steps will make any riding mower cut evenly.
1. The rear tires must be the same diameter i.e. same tread type and the same tire pressure (check it before each mowing).
2. Level the deck following the instructions in the manual and recheck it occasionally
3. Make sure the blade(s) are not damaged and kept sharp, rounded blades tear instead of cut.
4. Make sure the deck and its attachment points are not bent or damaged.
5. Drive at a slow walking speed with the engine at cutting speed.
6. Over lap rows in amounts sufficient to lift and cut the tire tracks from the previous pass.
7. Cut the grass at intervals that ensures you never have cut more than 1/3rd the total length of the grass.
8. Make sure the underside of the deck is clean.
9. Use a blade style that matches the type of grass you most often mow.

Jun 18, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

WHY IS CUT UN EVEN? MOWER LEAVES LINES IN LAWN


My 10 steps to ensure even cutting for any riding mower.
1. The rear tires must be the same diameter i.e. same tread type and the same amount of pressure
2. Level the deck following the instructions in the manual
3. Make sure the blades are not damaged or bent.
4. Make sure the deck nor its attachments are bent
5. keep the blades sharp and don't drive too fast when mowing.
6. Over lap rows about 20%
7. Cut the grass at intervals that ensures you never cut more than 1/3rd the total length of the grass.
9. Make sure the underside of the deck is free from chunks of clippings.
10. Use a blade with higher lift, yes you have to match the blades to the type of grass you cut most often, (commercial mowers use a universal blade and high speed decks).

Jun 18, 2010 | Husqvarna Lawn Tractor 48" Deck, 23 Hp,...

2 Answers

To mulch my grass clippings, do I have to use the side discharge or can I simply remove the bag and insert the rear plug?


Insert the rear plug if mulching is desired. The key to mulching is to mow the lawn frequently.You want to keep the mower deck height high enough to cut the grass and allow the mulching blades to work, but just low enough to actually cut the grass in a smooth uniform height. To low of a cut setting will clog the mower and create a mess. 2 times a week is a good frequency to start with.

Jun 10, 2010 | Toro Lawnmower 20099 Mower Mowers Lawn

1 Answer

The mower is mowing uneven in the front. what can i do? it seems that it is scalping the grass but both sides are level


Look under the mower deck. If you can't see well and work on it, you may have to remove the mower deck and flip it over on the ground. Grass and mud buildup in the decj could cause a blade to pinch grass, 'scalping' the lawn. Clean it all out. Dull blades cause cut grass to look torn and brown. Remove and sharpen. Bent blade will cause uneven cut. Replace it. Good luck! Please rate if you found this helpful, thanks!

Jun 05, 2010 | Mustang Rzt 50" Zero Turn Riding Lawn...

2 Answers

Cuts uneven, lawn looks terrible. Missing half


Are your blades upside down? Mower deck level?Proper air pressure all 4 tires?Correct blades for the diameter of cut? Deck bent? Deck hangers bent?

May 28, 2010 | Garden

1 Answer

I have a Craftsman Lawn tractor. Blade leaves grass uncut.


Hi Tom,
Check your spindle shafts for loose play. If your bearings are worn out and sloppy, the belts pull the spindle to one side and an angle cut results... close cut grass at outer edge and high in center will leave this grass trail you are describing. I'd replace the bearings next year for sure.
I hope this helps... Good luck!

Oct 04, 2009 | Garden

1 Answer

Leaving streaks of grass in middle of mower


Your forward speed may be too fast for the mower blades to cut every blade of grass. It may be new, but check the deck to see if there are any dents pushing the quill assemblies up making the deck cut uneven. Or it may have the wrong blades on it.
I have seen this problem in the past with a Gravely mower. The person was trying to cut grass to fast. He sold the unit and the new onwer did not noticed any the problems the old owner described.

Sep 25, 2009 | Husqvarna Lawn Tractor 48" Deck, 23 Hp,...

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