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21AK125G800 MTD Tiller - Overview

Sections of the 21AK125G800

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Trimmer Carburetor – Part Number: 753-06190
Trimmer Carburetor
★★★★★
★★★★★
(4)
PartSelect #: PS9119300
Manufacturer #: 753-06190
A carburetor basically consists of an open pipe through which the air passes into the inlet manifold of the engine. The pipe is in the form of a Venturi: it narrows in section and then widens again, ...
$49.52
  In Stock
Order now and your part arrives by Mar 19
THROTTLE CABLE – Part Number: 753-06831
THROTTLE CABLE
★★★★★
★★★★★
(1)
PartSelect #: PS18475364
Manufacturer #: 753-06831
This is a genuine manufacturer-sourced replacement component which is specially designed for use with Bolens and Troy-Bilt tillers. The throttle cable is connected to the carburetor and it stops the e...
$17.98
  In Stock
Order now and your part arrives by Mar 19
Lawn Mower Hex Washer Head Screw – Part Number: 710-0599
Lawn Mower Hex Washer Head Screw
PartSelect #: PS9298768
Manufacturer #: 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 ...
$6.25
  In Stock
Order now and your part arrives by Mar 19
Carburetor Gasket – Part Number: 753-06253
Carburetor Gasket
PartSelect #: PS9119051
Manufacturer #: 753-06253
This is an authentic Craftsman replacement part that has been sourced from the original manufacturer to be used with trimmers and blowers. The gasket is used to seal the connection between the carbure...
$6.25
  In Stock
Order now and your part arrives by Mar 19
Clutch Asm Small – Part Number: 753-05860
Clutch Asm Small
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★★★★★
(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...
$35.80
  In Stock
Order now and your part arrives by Mar 19
Carburetor O-ring – Part Number: 753-06185
Carburetor O-ring
PartSelect #: PS9118815
Manufacturer #: 753-06185
This is a manufacturer approved O-Ring designed for lawn and garden equipment. This is the O-Ring that provides an Air Tight seal between Carburetor and Cylinder Head. If doing maintenance on carburet...
$6.25
  In Stock
Order now and your part arrives by Mar 19
Nut-flglk – Part Number: 712-04064
Nut-flglk
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★★★★★
(1)
PartSelect #: PS9299574
Manufacturer #: 712-04064
Also referred to as a Lock Nut or Flange Lock, this nut is designed for use with various lawn and garden equipment. The purpose of this part is to hold parts in place while resisting loosening when pr...
$6.25
  In Stock
Order now and your part arrives by Mar 19
FUEL TANK – Part Number: 753-06846
FUEL TANK
PartSelect #: PS18475372
Manufacturer #: 753-06846
$24.80
  In Stock
Order now and your part arrives by Mar 19
Trimmer O-Ring – Part Number: 753-06174
Trimmer O-Ring
PartSelect #: PS9120828
Manufacturer #: 753-06174
This authentic manufacturer-approved component which is specially designed for use with handheld lawn and garden equipment. The purpose of this o-ring is to provide an air-tight seal between connected...
$6.25
  In Stock
Order now and your part arrives by Mar 19
Spark Plug – Part Number: 753-06847
Spark Plug
PartSelect #: PS10009739
Manufacturer #: 753-06847
This is a genuine OEM sourced part which is specially made for use with Craftsman handheld lawn and garden equipment. Its purpose is to deliver electric current from the ignition system to the combust...
$11.13
  In Stock
Order now and your part arrives by Mar 19
Insulator Assembly (includes 22 & 23) – Part Number: 753-06189
Insulator Assembly (includes 22 & 23)
PartSelect #: PS9120833
Manufacturer #: 753-06189
This is an OEM insulator assembly that is used to protect the carburetor from engine heat and features various seals and hardware made of plastic, steel and rubber. It fits in between the carburetor a...
$11.65
  In Stock
Order now and your part arrives by Mar 19
Trimmer Air Filter Mounting Screw – Part Number: 710-04517
Trimmer Air Filter Mounting Screw
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★★★★★
(1)
PartSelect #: PS9099590
Manufacturer #: 710-04517
$8.25
  In Stock
Order now and your part arrives by Mar 19

Questions And Answers for 21AK125G800

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Common Symptoms of the 21AK125G800

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Will Not Start
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Engine stops after a few seconds or minutes
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Engine revs but trimmer head will not turn
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Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
string trimmer would not start
emptied fuel from tank. pulled off the 2 fuel lines from the carburetor.opened the air cleaner door. removed the 2 torque screws that hold on the carburetor. removed the carburetor and air cleaner gasket. installed new carburetor and gasket and put back and tightened the 2 torque screws. closed air cleaner door and pushed the fuel lines onto the new carburetor.put some fuel in the tank. started the trimmer. runs great.
Parts Used:
Carburetor Gasket Trimmer Carburetor
  • john from SHARPSVILLE, PA
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
6 of 8 people found this instruction helpful.
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Trimmer Would Not Start
The replacement of the carburetor, O-ring, and gasket was simple. I removed 2 screws that held the air cleaner and carburetor in place, swapped them out, and replaced the screws. What took longest was finding a piece of fuel line after breaking one of them. It was brittle after hanging in my garage for several years. I found some in my garage and replaced it. It took a few pulls to get it started, but ran very smooth.

Additional information: rather than mixing my fuel, I purchased 40:1 pre-mix fuel to prevent gunking up the carburetor in the future. I use it in my other trimmer and have not had any issues.
Parts Used:
Carburetor Gasket Carburetor O-ring Trimmer Carburetor
  • Ricardo from FORT WORTH, TX
  • Difficulty Level:
    Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Pliers, Screw drivers
3 of 4 people found this instruction helpful.
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Carburetor replacement
Removed 2 screws securing the air cleaner and carburetor to the engine using a T25 Torx driver. then removed the throttle cable from the carb.Then removed the o ring gasket from the engine and replaced with a new one and replaced the carb etc. Primed it and fired it up.Runs just like new.
Parts Used:
Carburetor O-ring Trimmer Carburetor
  • William from PALMETTO, FL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    Less than 15 mins
8 of 20 people found this instruction helpful.
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