Fitment first · Trimmer · SKU B0F8ZTKVVV

3LB .105" String Mower Replacement Trimmer Line

3LB .105" String Mower Replacement Trimmer Line For Troy-Bilt TB22TM TB22TMC TB22TMB Trimmer Mower,replace 21884 cutter Cutting Cord for Earthquake Model :37…

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Compatibility checkpoint

Verify this before you buy

4 listed model matches
1 Match the machine model

Compare the model printed on your trimmer label with the fitment list below.

2 Confirm the line and spool spec

Use the old spool and manual to confirm gauge, diameter, and feed style.

3 Check the part code

Match part B0F8ZTKVVV or ASIN B0F8ZTKVVV against the listing and your old part.

Listed model matches
Troy-Bilt TB22TM TB22TMC TB22TMB Trimmer Mowerreplace 21884 cutter Cutting CordEarthquake Model :3767640314 22 in. Model # ST 100 line
Equipment brandTroy-Bilt
ReplacesB0F8ZTKVVV
CategoryTrimmer
ConditionNew aftermarket replacement

Overview

This spooled trimmer line provides a bulk supply of cutting line for compatible string trimmers and weed eaters. Having extra line on hand means you can reload in the field without cutting a job short. The line is manufactured from commercial-grade nylon for resistance to breaking and fraying.

Key specifications

  • Replacement trimmer line
  • Line diameter: .105”
  • Commercial-grade nylon construction
  • Resistant to fraying and breakage
  • Compatible with bump-feed and fixed-line trimmer heads

Compatibility

This line is compatible with Troy-Bilt trimmers as listed above. Verify the line diameter matches your trimmer’s specification to ensure proper fit in the spool housing and guide eyelets.

Installation notes

With the trimmer powered off, open the spool housing and remove the old spool. Thread the new line through the anchor hole in the spool and wind in the indicated direction, keeping rows tight and parallel. Reassemble the trimmer head and test for proper line advancement.

Common questions

Q: Will this .105” 3 lb replacement trimmer line fit my Troy-Bilt TB22TM or TB22TMC trimmer mower?

Yes, this line is made to fit Troy-Bilt TB22TM, TB22TMC, and TB22TMB trimmer mowers. It also replaces cutter cord part 21884 and is compatible with Earthquake model 37676 / 40314 and the 22 in. ST 100 line setup, as long as your machine is designed for .105” trimmer line.

Q: How do I install this .105” line on my Troy-Bilt TB22TMB trimmer mower?

Cut the line into the correct lengths recommended for your trimmer mower, then thread each piece through the line holder or cutting head openings evenly so both sides match. Before starting the machine, make sure the line is seated securely and spins freely without rubbing the deck or guard.

Q: Is .105” trimmer line a good choice for heavy weeds on an Earthquake 37676 or 40314 trimmer mower?

Yes, .105” line is a common heavy-duty size for trimmer mowers and works well for thicker grass and tougher weeds. Check the line regularly for wear or shortening during use, because replacing it before it gets too short helps maintain cutting performance and reduces strain on the machine.

Compatibility

This page lists compatible equipment gathered from the product fitment data. Always confirm the model number stamped on your machine before ordering.

Troy-Bilt TB22TM TB22TMC TB22TMB Trimmer Mowerreplace 21884 cutter Cutting CordEarthquake Model :3767640314 22 in. Model # ST 100 line

Not sure which spool you need? See our guide: How to wind a trimmer spool or How to measure your old spool.

Before you buy — how to verify fitment

  1. Find your trimmer model number. It's usually on a label on the motor housing, battery slot, or lower shaft.
  2. Check spool compatibility. Compare the model number with the compatibility list above.
  3. Verify line gauge. Confirm the line thickness matches what your trimmer head requires by checking your manual or the old spool.
  4. Inspect the spool housing. Make sure the spool diameter, cap, spring post, and feed style match your trimmer head.

Frequently asked questions

How do I know this spool fits my trimmer?

Check your trimmer model number against the compatibility list above. Then verify the line gauge (.065, .080, .095) matches what your trimmer head requires — it's usually printed on the spool cap or in the manual.

Can I rewind a pre-wound spool?

Yes. Once the factory line runs out, you can rewind the spool with bulk trimmer line of the same gauge. Pre-wound spools just save time on the first load.

How often should I replace the spool?

Replace the spool when the line no longer feeds properly, the spring loses tension, or the spool body is cracked. Under normal weekend use, a spool lasts 2–4 refills before the housing wears out.

What gauge trimmer line should I use?

Match the gauge to your trimmer's power: .065" for light-duty electric trimmers, .080" for mid-range cordless, and .095" for gas-powered or heavy-duty models. Using too thick a line can stall the motor.

Where to buy

This part is available through Amazon with free returns on most orders. Use the fitment details above to compare your model, old part number, and physical specs before ordering.

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