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821-020 ((210-405-019)(1990)) MTD Tiller - Overview
Diagrams for 821-020
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$6.40
In Stock
Lawn Mower Hex Washer Head Screw
Part #710-0599
This is an original replacement part sourced directly from the manufacturer. The screw is commonly found in yard equipment from Craftsman, such as lawn tractors, snow blowers, and edgers. This part is made of metal, and may be found in various locations in the machine, depending on model. Please be aware that there are different screws...Read more used in the machine. Refer to the parts diagram to be sure of ordering the correct part. You will require a wrench when replacing this item. The screw is sold as an individual replacement part.
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$10.49
In Stock
Bearing-king Pin
Part #931-0374
The flange sleeve bearing, also known just as the bearing, is sold individually, and assists the tine shaft rotation on your tiller by reducing friction between the moving parts and securing their positioning. Because of this function, this part can wear easily and requires regular replacement. This part is OEM, black in color and made of...Read more metal.
If the shaft becomes loose within the tiller housing, and you notice noise coming from it, it is likely that you need to replace this bearing. Most customers rated this as a moderately easy repair, which requires a screwdriver, pliers, a socket set, wrench driver, and nutdriver.
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$42.70
Special Order
Control Box-thrott
Part #831-0823A
The Throttle Box Assembly, or the Throttle Assembly, is a kit that includes the housing, handle, and hardware. It is black and constructed of steel and plastic. It can be installed onto the right hand upper handle, using a screwdriver and pliers, and is rated as Medium difficulty to install.
This kit contains the parts that control the ...Read moreamount of the air and fuel entering the engine. When the part breaks (likely due to fatigue) you will no longer be able to control the engine. If nothing happens when you move the handle, that means it has become disconnected. When the part is broken it must be replaced. Check your model number to ensure you are selecting the correct replacement part.
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$18.43
In Stock
Cap-dust
Part #931-0487
This OEM dust cap prevents dust from entering the shaft and surrounding area of your tiller. This part is black, sold individually, and made out of plastic. Due to damage from ongoing use, this part can become broken or get knocked off entirely and go missing, which you will notice, as it attaches to the outside of the tiller gear housing...Read more.
This is an easy repair that only requires a hammer to make. Please note that you will need to purchase a rubber seal alongside the dust cap when making this repair, part number 921-0175.
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No Longer Available
Tiller Seal
Part #921-0175
The bearing seal, also known simply as the seal, is a special seal for the bearings in your tiller. It attaches in the tiller housing, with the bearing and shaft, and over time it can become damaged due to fatigue and general wear. This part is made of rubber, is black in color, and is sold individually.
Repairing the bearing seal will ...Read moregenerally be a medium-difficulty job, one that requires a screwedriver, socket set, wrench set, and hammer.
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$6.40
In Stock
Tiller Jamlock Nut
Part #712-0266A
The Jamlock Nut is a 3/8-16 inch metal nut which can be installed using a socket or wrench set. It's used to secure and lock parts in place. If the part is damaged and comes loose it should be replaced. This is an authentic part authorized by the manufacturer.
$30.82
In Stock
Bearing
Part #941-0155
This authentic OEM bearing measures 0.62 inches inside diameter, and 1.38 inches outside diameter, and is 0.436 inches thick. Silver and balck in color and sold individually, the bearing is comprised of steel and rubber.
This bearing allows the input shaft to rotate freely inside the gear box, and over time can become worn or damaged. Y...Read moreou will know your bearing is damaged if it is making a growling, grinding, or squealing sound. This is an easy repair, and requires a bearing puller tool to carry out.
Locate the bearing inside the gear box on each end of the input shaft, ensuring you have confirmed this is the part you need by verifying your model number or using your owners manual.
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$91.00
In Stock
Cable-clutch
Part #946-0535
This clutch control cable is an OEM part made to be used with your garden tiller. Its function is to engage the clutch in order to drive the tiller. This part is black and silver in color, composed of metal with a rubberized coating, and it is sold individually. Over time, this part can snap or break due to regular use, and when this occu...Read morers, the clutch will not function properly when applied, meaning you will no longer be able to control the drive of your tiller.
Replacing this part is easy, however, and only requires a pair of pliers.
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$6.74
In Stock
Wsh, Bell., .34 x .872 x .06
Part #736-0242
Sourced directly from the original manufacturer, this Bell Washer is made of gold-colored metal and is sold individually, not as part of a kit or assembly. It is used to provide spacing between various part assemblies along a shaft.
If you hear a strange noise coming from the shaft area, or you notice the Washer is visibly worn or damag...Read moreed, it will need to be replaced. Refer to your owners manual to determine the exact location of this part.
Customers rate the difficulty of this repair as Medium.
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$35.59
In Stock
Cable-control
Part #946-0502
This is a genuine manufacturer-sourced replacement throttle cable which is specially designed for use with MTD tillers. It is connected to the carburetor and it stops the engine when you shift the lever to the full choke position, over time it may wear out and break eventually requiring a replacement. This high-quality metal throttle cabl...Read moree is sold individually, please note the housing, the trigger, and the hardware are all sold separately.
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$6.57
In Stock
Washer-lock 5/16
Part #936-0119
This Washer-Lock 5/16 is a silver, metal part that is sold individually and comes direct from the manufacturer. With a 5/16 Inch Interior Diameter and 1/2 Inch Outside Diameter, it is used to prevent the nut from backing off and becoming loose on the pulley shaft, and is attached to the drive belt pulley assembly. You will know if you nee...Read mored this because your owners manual will specify it, or the model number of your machine will correspond with this part. If the part is broken due to fatigue, the shafts will free spin when they should be locked together, and must be replaced.
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$49.44
In Stock
Lawn Mower Grease Benalene (8 Oz)
Part #737-0300A
This 8-oz multi-purpose grease is an OEM replacement lubricant formulated for use in gear cases, transmissions, and chain cases on outdoor power equipment. It helps reduce friction and wear in high-load moving parts, supporting smooth operation and extending component life. Supplied in a convenient tube for easy application, it is an idea...Read morel choice for routine maintenance when servicing gearboxes, transaxles, or drive components that require consistent, heavy-duty lubrication.
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