OEM 90540850 Replacement for Black & Decker String Trimmer Spool Kit

What It Is

This OEM 90540850 spool kit is a direct replacement for the line-feed head on compatible Black & Decker string trimmers and edgers. It holds and feeds trimmer line automatically, designed for homeowners maintaining lawns and gardens.

Fitment & Compatibility

Before buying, verify your trimmer’s model number (usually on a sticker under the battery or near the motor housing). This kit fits select Black & Decker 20V MAX, 40V MAX, and corded trimmers, including models like LST136, LST220, and GH900. It does not fit all Black & Decker trimmers—check your manual or the manufacturer’s compatibility list. Measure the spool diameter (roughly 3 inches) and ensure it matches your existing head. This is an OEM part, so it will match factory specs; aftermarket knockoffs may vary slightly.

Key Things to Do

• Check line type: Use only 0.065-inch or 0.080-inch diameter trimmer line; thicker line may jam or not feed properly.
• Installation is tool-free: Press the spool into the head, thread the line through the eyelets, and snap the cover on. No disassembly of the trimmer needed.
• Common gotcha: If line doesn’t feed, the spool may be wound too tight or in the wrong direction (follow the arrow on the spool).
• Quality note: OEM plastic is durable but can crack if dropped on concrete; handle with care during installation.

Should You Buy It

Yes, if your Black & Decker trimmer is on the compatibility list and you want a hassle-free, drop-in replacement with automatic line feed. It’s a solid choice for most homeowners, though heavy-duty users may prefer a bump-feed head for more control.