For owners preparing for a spool change, setup check or storage

Prepare your LST300 before maintenance.

Keep the battery removed, identify the exact tool type and check the original guard and cap before choosing a spool or setup task.

The LST300 name alone does not establish the tool type or replacement-part fit. Make a preparation card before choosing a spool, cap or adjustment guide. The card never authorizes a powered test.

Make my next-step card ↓

Original diagram of the guard and its user-accessible mounting checks — Original schematic. Match parts to your own manual.

Equipment covered

BLACK+DECKER LST300 with its exact label type matched to an official manual and figures, original AF-100 automatic-feed single-line head. No bump-feed, dual-line or metal cutting attachments.

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Your starting observations

Answer from what you already know. Your choices and note stay on this page until you download or leave.

Does your equipment match this scope?Compare the label and manual before handling parts. Keep serial numbers private.Is the battery physically removed and the head stopped?Keep it removed for guard, cap, spool and handle work.What is the condition of the guard, cap and controls?If a part is damaged, identify the exact replacement with manufacturer support rather than improvising a fit.What are you preparing to do?Each detailed task repeats the isolation and exact-type checks before its steps.Optional observation for your own card

Before you handle any parts

Release the trigger, wait for the head to stop and remove the battery before every hands-on check. Keep clear of the sharp line cutter. A cracked guard, broken cap tabs, damaged battery or faulty switch keeps the tool out of use.

Read the care routes

You can open any guide without creating a card. Each guide checks whether its procedure applies.

Before a spool change

Match the original head and line specification, then follow the battery-removed spool sequence.

Before the next session

Check guard retention, cap tabs and handle adjustment separately.

At season close

Clean accessible surfaces and plan dry storage with the battery removed.

Open the related care pack →

Manufacturer references

BLACK+DECKER LST300 instruction manual (manufacturer document, retailer-hosted)Safety, assembly, replacement spool/line, maintenance and troubleshooting. Match the tool type and figures before use.
BLACK+DECKER LST300 product and supportModel identity, automatic feed, AF-100 included spool
BLACK+DECKER: locate a manual using model and type numberModel/type number identification and authoritative ServiceNet lookup