Product review: Black & Decker AF-100-3ZP 30-Feet 0.065-Inch Line String Trimmer Replacement Spool

The automatic feed spool on GrassHog advances the string without needing to bump on the ground. The benefit of this system is that cutting is easier as it constantly replaces worn out string, the down side that the usage of the string is faster than when done manually.

I have tried wounding the string by hand and found it a bit cumbersome and a bit time consuming, so I figured less than $5 per spool is not to bad to save me 5 minutes of time wounding and dealing with jammed string. Each spool contains 30 feet of 0.065 inch diameter round line. It is factory spooled and is wound tighter than when I wound the spool by hand.

At the time I purchased these replacement spools the official Amazon description listed only GrassHog NST2018 as compatible model. I can confirm that it works with the new Black & Decker NST2118 Cordless Electric GrassHog String Trimmer/Edger.

To replace the spool:
1. Remove battery
2. Squeeze the tabs on the spool cap to release it
3. Pull the empty spool out by pulling directly away from the housing
4. Clean out the housing from debris
5. Make sure that the level that controls the spooling is aligned with the edge of the housing
6. Take a string from the new spool and feed it through the eyelet in the housing
7. Push the spool into the housing and rotate it until it feels seated and the tabs of the spool align with the holes in the housing
8. Put the cap back on
9. The string outside the housing should be 5 3/8 inches, if it is longer than this length use scissors to trim it

Overall, I am pleased with the spools - they should take me through the next couple of summers!

You can find "Replacement Spools" on Amazon by following this link.


Ali Julia review ★★★★★