Models > YM21CS

YM21CS Troy-Bilt Trimmer - Overview

Sections of the YM21CS

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Carburetor – Part Number: 753-06190
Carburetor
★★★★★
★★★★★
(3)
PartSelect #: PS9119300
Manufacturer #: 753-06190
It is an authentic manufacturer-sourced replacement part that i supplied for Craftsman trimmers. The function of a carburetor is to mix the air and the gas into a highly combustible mix before it goes...
$30.42
  In Stock
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Fuel Tank Assembly – Part Number: 753-06183
Fuel Tank Assembly
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★★★★★
(2)
PartSelect #: PS10009586
Manufacturer #: 753-06183
$11.68
  In Stock
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Bump Head Knob Assembly – Part Number: 791-153066B
Bump Head Knob Assembly
★★★★★
★★★★★
(2)
PartSelect #: PS9306452
Manufacturer #: 791-153066B
This genuine bump head knob assembly, sometimes known simply as the bump head, is black and approximately 2 inches long. Sold individually, this plastic part releases the cutting line. Over time, this...
$12.20
  In Stock
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Clutch Assembly, Small – Part Number: 753-05860
Clutch Assembly, Small
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★★★★★
(2)
PartSelect #: PS9303676
Manufacturer #: 753-05860
$21.99
  In Stock
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Line Trimmer Spool – Part Number: 753-1155
Line Trimmer Spool
★★★★★
★★★★★
(1)
PartSelect #: PS9119496
Manufacturer #: 753-1155
This spool is for line trimmers. Spool houses the cutting line and fits inside the cutting head to cut grass and weeds. Wear work gloves to protect your hands when installing this part.
$20.70
  In Stock
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Air Cleaner Gasket – Part Number: 753-06253
Air Cleaner Gasket
PartSelect #: PS10009619
Manufacturer #: 753-06253
$2.99
  In Stock
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Aircleaner Filter – Part Number: 753-06417
Aircleaner Filter
PartSelect #: PS10009651
Manufacturer #: 753-06417
$2.99
  In Stock
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Switch – Part Number: 791-182405
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 ...
$9.07
  In Stock
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Throttle Trigger – Part Number: 753-04119
Throttle Trigger
PartSelect #: PS11839169
Manufacturer #: 753-04119
$6.42
  In Stock
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Anti-Rotation Screw – Part Number: 791-182519
Anti-Rotation Screw
PartSelect #: PS10014468
Manufacturer #: 791-182519
$4.26
  In Stock
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Spring – Part Number: 791-610317B
Spring
PartSelect #: PS10014644
Manufacturer #: 791-610317B
$9.25
  In Stock
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Aircleaner Cover Assembly – Part Number: 753-06415
Aircleaner Cover Assembly
PartSelect #: PS10009648
Manufacturer #: 753-06415
$9.30
  In Stock
Order within the next 10 hrs and your part ships today!

Questions And Answers for YM21CS

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Common Symptoms of the YM21CS

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Will Not Start
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Keep searches simple. Use keywords, e.g. "leaking", "pump", "broken" or "fit".
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 Carburetor
  • William from PALMETTO, FL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    Less than 15 mins
7 of 12 people found this instruction helpful.
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Fuel line broke
Removed the two screws holding the fuel tank to the main unit. Removed the two fuel lines and any stuck on rubber. Installed and installed two screws to mount the new tank. Slid fuel lines on their respective connectors. Done.
Parts Used:
Fuel Tank Assembly
  • Erik from ROBERTSDALE, AL
  • Difficulty Level:
    Really Easy
  • Total Repair Time:
    15 - 30 mins
  • Tools:
    Screw drivers
5 of 6 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:
Air Cleaner Gasket Carburetor O-Ring Carburetor
  • Ricardo from FORT WORTH, TX
  • Difficulty Level:
    Easy
  • Total Repair Time:
    30 - 60 mins
  • Tools:
    Pliers, Screw drivers
1 person found this instruction helpful.
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