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21DS122R799 MTD Tiller - Overview

Models starting with 21DS122R799

Keep searches simple, eg. "belt" or "pump".
Trimmer Primer and Hose Assembly – Part Number: 791-683974B
Trimmer Primer and Hose Assembly
PartSelect #: PS10014772
Manufacturer #: 791-683974B
This manufacturer-certified primer and hose assembly includes the primer bulb, the primer bulb housing, and the fuel line. Any or all of the clear plastic parts in this assembly may experience wear an...
$27.42
  In Stock
Trimmer Fuel Return Line – Part Number: 791-181086
Trimmer Fuel Return Line
★★★★★
★★★★★
(2)
PartSelect #: PS9137685
Manufacturer #: 791-181086
The OEM fuel return line, or fuel return tube, is a clear plastic line that returns fuel from the primer bulb back into the fuel tank of your engine. You will know your fuel return line is in need of ...
$7.89
  In Stock
Lawn Mower Hex Washer Head Screw – Part Number: 710-0599
Lawn Mower Hex Washer Head Screw
PartSelect #: PS9298768
Manufacturer #: 710-0599
$4.44
  In Stock
Trimmer Small Clutch Assembly – Part Number: 753-05860
Trimmer Small Clutch Assembly
★★★★★
★★★★★
(2)
PartSelect #: PS9303676
Manufacturer #: 753-05860
This clutch assembly is a genuine OEM replacement kit for outdoor lawn equipment. The kit includes the clutch drum, clutch, clutch washer, and screw. The clutch assembly transfers power from the engin...
$28.58
  In Stock
Trimmer Switch – Part Number: 791-182405
Trimmer Switch
PartSelect #: PS10014381
Manufacturer #: 791-182405
This Switch is a black, plastic on/off switch for a trimmer. Installation of this manufacturer-certified switch is rated as "Easy" and requires a screwdriver, wrench set and socket set. Refer to your ...
$12.77
  In Stock
Trimmer Spark Plug – Part Number: 791-610311B
Trimmer Spark Plug
PartSelect #: PS10014637
Manufacturer #: 791-610311B
This Spark Plug is inserted into the cylinder head and is rated as "Easy" to install. The spark plug ignites the air fuel mixture inside the combustion chamber. If the part doesn't work, or is missing...
$14.40
  Special Order
Trimmer Air Cleaner Filter – Part Number: 791-180350B
Trimmer Air Cleaner Filter
PartSelect #: PS10013535
Manufacturer #: 791-180350B
The manufacturer-certified Air Cleaner Filter is a grey foam filter used to prevent debris and dirt from entering the carburetor and engine, causing damage. Installation is rated as "Easy". This filte...
$10.65
  Special Order
Carburetor Assembly – Part Number: 753-04333
Carburetor Assembly
PartSelect #: PS10009128
Manufacturer #: 753-04333
  No Longer Available
Trimmer Carburetor Gasket – Part Number: 791-610675
Trimmer Carburetor Gasket
PartSelect #: PS10014659
Manufacturer #: 791-610675
$4.41
  Special Order
Trimmer Cover Screw – Part Number: 791-181345
Trimmer Cover Screw
PartSelect #: PS9135852
Manufacturer #: 791-181345
$4.32
  In Stock
Trimmer Crankcase Cover Gasket – Part Number: 753-1208
Trimmer Crankcase Cover Gasket
PartSelect #: PS10009849
Manufacturer #: 753-1208
$18.12
  In Stock
Click Pin – Part Number: 753-04070
Click Pin
PartSelect #: PS9456500
Manufacturer #: 753-04070
This Click Pin (aka a Lynch Pin) is a metal, gold, individually sold pin which can be installed with a screwdriver and socket set. It attaches to the gearbox assembly and will need to be replaced if m...
  No Longer Available

Common Symptoms of models starting with 21DS122R799

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Will Not Start
Fixed by
these parts
Fixing
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Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
clogged carburetor
replaced old with new
Parts Used:
Carburetor Assembly
  • Rainer from LANCASTER, OH
  • Difficulty Level:
    Very Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers
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