My Cordless Grass Trimmer is not operating properly, what do I do? Problems Possible Cause Possible Solution The motor does not run or the tool runs slowly Battery is not inserted well or is flat. Spool housing cannot rotate freely. Cutting line does not protrude. Check to make sure the battery is charged and inserted well. Remove the spool and clean the slots; carefully remove any grass and weeds or other debris. Cut the spool line off so that it just reaches the line trimming blade. Line fails to cut off Line cutter in guard is covered, damaged, or missing. Line extends past guard. Rewind or trim line to line cutter Related articles Why Isn't my unit turning on? My Hedge Trimmer is not operating properly, what do I do? Where can I find FAQs on my Snow Joe + Sun Joe product? Will any battery fit onto my unit? My SJH904E Hedge Trimmer isn't operating properly, what do I do?