How does bumping a trimmer work - Black & Decker String Trimmer Cordless 12" 18V

have you wrapped the cable the right way? it only feeds out when the head is spinning

get a bump and feed head put on it it i just got one put on myself heaps quicker Mowerpower Kilsyth Victoria

Bumping the string head lightly on the ground will release more trimmer line if the line was loaded properly and spooled in the correct direction. If the line was loaded wrong, doing this procedure won't help. Make sure your line was loaded correctly. Do this bump as the engine is slowing down or running slow. Most all gas trimmers work this way, but some of the electric ones have automatic line feed and no bumping is necessary.

The line on my new 26cc Homelite would also feed out by itself. That started me thinking the line was wound backwards. I wrapped the line in the opposite direction as was shown on the bump feed reel and now the dang thing works although the bump feed needs to be "bumped" pretty hard to work. Is it possible that the reel was manufactured with the (string direction) arrows pointing the wrong direction? The new 26cc unit is also underpowered compared to my older 25cc trimmer.

Try googling.... www.homelite.com....enter your model number and they will have the illustrated parts page for you to find the correct part you need and it's price...hope this helps.

It sounds like the string is not spooled correctly. Try re-spooling the string, ensuring the string will be able to freely move when the feeder is bumped.

Either that or you may be almost out of string and need to get more and re-spool.

You are pulling the trigger to make it spin while bumping, right? The bump-n-go action is based on centrifugal force.

Unscrew the bump-knob and the rest pulls off. If it won't unscrew you could always cut it off and buy a new one from ALM Manufacturing 01423 797208

So, is this trimmer suppose to feed the string automatically? If not, then it sounds like the string is wound up on the spool the wrong direction.

Jim

undo the 2 screws on top of the carb. The bulb is part of a 2 piece cap undo that and it fall out.