Overview
Keep your string trimmer ready for action with this pre-wound replacement spool. It is built to the same dimensions as the OEM spool, so it drops right into the trimmer head with no modifications. Aftermarket spools provide the same cutting performance as factory originals at a better value.
Key specifications
- Pre-wound replacement trimmer spool
- Direct-fit for listed trimmer models
- Bump-feed compatible winding pattern
Compatibility
This spool is designed for Black+Decker string trimmers as listed above. Confirm the spool part number, line diameter, and trimmer model before ordering to ensure a proper fit.
Installation notes
Remove the spool cover from the trimmer head. Extract the old spool and clean out any grass or debris. Insert the new pre-wound spool, feed the line ends through the guide holes, and reattach the cover. Verify the line extends the correct length before trimming.
Common questions
Q: Will this RS-136 spool fit my Black and Decker ST4500 and ST1000 trimmers, or are there different versions I need to watch for?
Yes, this replacement spool is made for the Black and Decker models listed, including ST4500 and ST1000, and it cross-references with RS-136-BKP and part number 143684. If your trimmer uses the RS-136 style 20 ft spool, it should fit correctly, but it’s always smart to confirm the model number on the tool label before installing.
Q: Does this spool come pre-wound, and do I need to do anything special when installing it in an ST4400 or ST6500?
This type of replacement spool is designed to drop into compatible heads pre-wound, so installation is usually straightforward. Before installing, unplug the trimmer or remove power, clean out any grass or debris from the spool housing, and make sure the line feeds through the eyelet smoothly so it advances properly during use.
Q: I’m using this on a Black and Decker CST800 and the line keeps sticking or not feeding well—what should I check?
First, make sure the spool is seated correctly and the line isn’t crossed, pinched, or wrapped too tightly inside the head. It also helps to inspect the spool cap and housing for dirt buildup or wear, because even a compatible RS-136 spool can feed poorly if the head components are clogged or damaged.
