Question about Poulan 42-Inch Steel Deck 17.5 HP Briggs & Stratton I/C Engine With 6 Speed

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We changed the blades, changes a spindle and checked the deck and tire pressure on our Poulan Pro Mower. It is still cutting uneven. What else should we check.

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Well the plane of the spinning blades obviously is not parallel to the ground. While the ground will never be level, do what you can and first get the mower on a good piece of flat concrete. Measure distance between each corner of the mower deck to the concrete. You have had the deck off, the deck hang mechanisms have some adjustment so you can lower the front of the deck relative to the rear and vice versa, and lower the left relative to the right side, and vice versa. Look for threaded rods with adjusting nuts, pins which can go into different holes, etc.

As a last resort you could google "poulan, mower, manual" which would take you to their website and you can download the manual for the mower. All my mowers, MTD, Husq, Simplicity, came with a manual and had explicit instructions for this process. Most all these mowers are made by Roper or AYP and you may find information by googling those companies.

Posted on Aug 25, 2010

  • wekjo Aug 25, 2010

    If you are the same folks who keep posting this same problem with this same mower; I am thinking that maybe when the deck is engaged the lateral torque causes the deck to become akilter. To test that theory some brave person is going to have to check the distance from the bottom of the deck to the concrete on each side with the blades engaged. That assumes there is no severe warping of the deck and that the mandrels are the same. If it is way off, then you are going to have to find the bushing or frame hole which is wallowed out.

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1 Answer

Left side is scalping especially when turning


Stephen Bent/damage blade or spindle, check your deck for support link pin missing, damaged or rusted out brackets, blade spindle loose/mount damages or rusted out, missing deck support spring,wheel/roller if equipped, damaged blades, Recheck tire pressure and front steering axles for bent/damage, etc.
When measuring deck for level, measure at blade tips not the deck on a flat level surface. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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Uneven Cutting with my Zero Turn 50"...Possible Causes?


First is being sure all your tires have proper air pressure and you don't have a bent blade. Then while parked on flat concrete and both outside blades at 3 and 9 o'clock measure blade height far left side of deck and far right side and compare. I there is a difference the entire deck is out of level and should be adjusted. Then remove the blade drive belt from one of the pulleys so everything is slacked. Grab each blade and see if it wobbles or has excessive play and check the spindle housings for cracks or breaks. If you find a housing with wobble or play the bearings in that spindle are shot ( this is a lot harder to detect with the belt tension on the pulleys) and should be replaced. If you find a broke or cracked housing the housing will need to be replaced. Either one of these situations may not be obvious with the mower at rest but the blade will wobble at speed causing uneven cuts.

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2 Answers

Why is mower cutting one sided


Possible issues:
Mower deck not level
one of the blades are bent
the spindle isn't square to the deck or the deck itself is bent

Jul 29, 2014 | John Deere Garden

1 Answer

42" deck the dicharge side


First thing to check would be the tire pressure. I usually run 12 psi in the front and 10 psi in the rear. Next would be to check the deck bearings. If the bearings are bad in either spindle the blade will cut uneven. Easiest way to check bearings is to grab ahold of the blade and try to rock side to side. If all is ok there the deck will need to be leveled. John Deere makes a blade leveler which can be picked up at the local dealer for a few bucks. Let me know if you have any other questions or if this helps, Daniel.

Sep 05, 2011 | John Deere 22HP VTwin 48" Riding Mower

1 Answer

The accelerator pedal is not working properly. Especially when trying to go up hill. I have to keep pushing & letting go, pushing & letting go. even when it starts to move. Also, the right blade...


Hello,

I am guessing that this was posted in wrong category.

You mention that you have to keep pushing / letting go of the accelerator. Is the engine RPM changing, or is the tractor surging, when you do this? What happens if you keep a steady pressure on the pedal? Isn't the throttle control via a lever on the panel?

Your uneven blade height can be caused by a multitude of issues.
1) If the spindles were changed, the wrong spindle may have been used on one side or the other.
2) The wrong blade adapter has been used on one of the spindles.
3) Mower deck has been bent
4) Mower deck is binding. Try raising it all the way up, and lowering all the way down. See if the uneven cut changes at both levels (all up or all down).
5) Blade is bent on one side, though this would usually cause such a ruckus and vibration it would be quite noticeable.
6) Belt is slipping. Yes, sounds strange, but if blade speed changes significantly, then the position where the grass is actually cut changes because the grass can "lean over" more.
7) Using a mulching attachment in tall grass can cause 1 blade to clog, and the cut grass that is swirling bends over other grass that needs to be cut.
8) Mower deck support bracket has been bent
9) Mower deck wheel has a bad bearing, and doesn't support the deck at same height as other side.
10) Mower deck is cracked / bent at a support location
11) You have lost a retaining pin at a support bracket and the bracket is loose.
12) A spindle's bearings are worn out, and the spindle is "jumping" as it turns.

If the blades are directly beside each other where they blades will overlap, it is normal for a small amount of height difference to occur. But, most decks have off set blades, one slightly in front of the other.

you should be able to raise the deck all the way, and pull the tractor's front wheels up onto something (landscape timber?) to get more access, then measure blade height in relation to bottom of the deck. If different, then you are looking at wrong blade / adapter or a spindle issue. If the blades are the same height, then you are likely looking at a deck support issue / binding in linkage.

Aug 25, 2010 | Craftsman Garden

1 Answer

Deck is cutting uneven


first check tire pressure if even check to see if deck hangars are still conected to deck if somay need to be adjusted only one side is adjustable.if changed blades make sure one is not up side down, also make sure blade spindles bearings are good

Jul 17, 2010 | Craftsman 42 in. Deck 19.5hp Lawn Tractor

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

My deck cuts shoter on the rt,ie uneven


Check your tire pressures:
10 psi. for rear tires.
14 psi. for the front.

Note that according to MTD:
Making sharp right hand turns. Twin-blade mower decks are designed with the discharge on the right side and two side-by-side blades. The side-by-side twin blade decks have the left hand blade positioned slightly forward and in front of the right blade. This provides cutting overlap when traveling in a straight line. As a result, the tractor should mainly operated making primarily left hand turns when cutting. During left turns this cutting overlap is maintained. If turning right when, it is possible to negate this overlap and leave an uncut strip.

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3 Answers

Craftsman 42 inch riding lawn mower is not cutting evenly


The first thing to check is your blades. If one is bent, it will never cut even. It happens a lot hitting roots, antbeds, etc. Mulching blades will bend easier than a straight blade. It's best to take them off and lay one on top of the other to see if they're bent.

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