HOW I REPLACE CORD

Question edited for full 'make model (what it is)'.

Nothing makes me think it has an internal fuse.

https://www.jackssmallengines.com/jacks-parts-lookup/manufacturer/black-decker/grass-trimmer/gh900-type-2/grass-trimmer

and also

https://www.google.com/search?q=gh900+trimmer+replace+fuse

..

the size of the string is critical in electric driven trimmers
it does have mass and the thicker string will over load the motor
stay with the recommended string size and keep to the recommended distance to the grass being cut
string line cutters work on the principle that the tip speed of the string is what does the cutting and that means that the first 1/2" of string cuts the grass
the rest back to the hub acts like a brake as it is dragged across the grass and slows the cutting speed and loads the motor
remember that the machine is designed to trim edges and not to cut down growth-- that is a job for heavier duty units

i think it sounds like the motor is going i had a chainsaw and it did the same thing after a while the motor went and the chainsaw was no good anymore so you mite want to take it to a dealer that deals with your grass trimmer

Look here (you will need Adobe Reader )
http://www.dewaltservicenet.com/documents/English/Instruction%20Manual/244137-01,GH600.pdf
Look under Operating Instructions....Spool and Line Replacement. This model is probably same as yours in that regard. Diagrams and instructions are included.

Usually means grass is too long for that trimmer or you are cutting too close...try trimming with just the tip of the cord...or eyelets are worn sharp

Where do I find line for my cordless lawn trimmer spectrum 60-2270-0 12 v

Is this the cordless Grass Hog? Turn the trimmer upside down so you're looking at the bottom. There are two orange tabs on either side of the spool -- push these in and the head should pop up so you can pull it out.

On the new spool, feed the cord out several inches and stick it through the hole in the trimmer where the old cord stuck out. Then pop the spool into the cavity so that the orange cover faces out (toward you). Pull the cord taut and make sure it is not long enough to hit the plastic guard. If it is too long and it touches the guard, pull the spool off and wind the cord in a little bit. If the cord is too short, pull the spool off and thread out a little bit more length and try again.

Turn the trimmer right side up and turn it on to make sure it works. If you hear a loud rapid thumping sound that sounds sort of like a machine gun, the cord is too long and is hitting the plastic guard.

i would like insructions how to replace trimes cord

Sounds like the starter spool is stripped. This the one with the cord on it. You have to dismantle the unit to replace it but it is not too hard. You can get a replacement online or ot your local small engine shop. Good luck...Lee

The batteries have a short life-span. Usually replacing the battery works. This is why this model frequently gets poor reviews and why I replaced mine with a corded model.