Question about Craftsman 42 in. Deck 19.5hp Lawn Tractor

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My blades are always running and wont shut off. Also they are running so slow that it wont even cut a blade of grass!!!!

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There is generally a clutch for the blades, made with a spring loaded pulley or electrical device. when you move the lever (pulley type) or move the switch (electrical type) it engages the belt which drives the blades. You have a problem there and someone with mechanical skills needs to look at it and repair it. I suspect a spring loaded pulley type, it sounds like someone took the belt off and put it back on wrong. There is no magic button to fix this.

Posted on Mar 18, 2011

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Posted on Jan 02, 2017

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Cant get blades to full RPM replaced all idlers all belts greased spindles new elec. clutch new blades when cutting grass it leave rows of uncut grass


if the blades wont get up to speed or not cutting grass you have a belt that is slipping. could be the pulley is damaged or just a worn out belt. if it is leaving a strip of uncut grass you have a blade that is wore down on the ends not cutting the full path

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Have a Cox Stockman ride-on lawnmower that wont cut. Just added 2 new blades (using 4 high lift blades) and still have to go over 100mm grass 3, 4 or more times to cut it down.


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if it is an older mower or has a lot of hours on it it is possible that the deck belts have stretched or wore out. if it runs fine in short grass but slows down in taller grass that is a sign of a wore belt. replace and it should be good. also be sure your blades are sharp. that will have a effect on its cutting capability.

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If you were cutting long grass it sounds like you may have burnt the motor out. It may have over heated. they are not made to cut long grass. You don't say whether the motor runs but not the blades if this is the case you may have sheared the shear pin in the blade assembly.

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Hello,

The reason the blade slows down when the grass gets thick is simply because the mechanism operating the blade is weak and cannot move fast when on thick grass.

I suggest you troubleshoot the mower. After that, the blade should work fine when the grass gets thick.

Also, some mowers normally gets slow when grass gets thick, so after troubleshooting, if the mower does the same, then you already know it has to be slow when trying to cut thick grasses.

Take care

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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.

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1 Answer

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If the grass is very tall (more than 10") you will have to slow down to less than 1 mph, if you have a mulch kit on this unit, remove it to get the grass out as quickly as possible. Also, sharp blades & a level deck are important.

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1 Answer

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1 Answer

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I've noticed that when the blade get dull it work harder a cutting tall grass. I just put a new blade on mine and now it runs and sounds like a brand new mower. also if the inside of the deck is coated with old grass that makes a differance too

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