Need Help Installing U-Turn Trimmer Head on Echo SRM-210

Sounds like there is something either broken,stuck or missing in the head.

Here is a link to the complete parts list and ordering for your trimmer.

In your manual under section 12: Line Head Installation. You will do the opposite of what it says here. The key is to LOCK the gear drive so the flex-drive shaft won't turn WHEN you are removing the trimmer head. They use a special tool (maybe you have it). But a small-shafted Phillips screwdriver or the like can be put in the drive hole to lock the gearing up as well. Look for the hole in the upper plate and align with the notch in the drive housing and grasping the entire string head unit, remove it. Here is your manual, see Section 12

http://dl.owneriq.net/8/854215d5-44e4-4b5d-b773-77b331fd73b3.pdf

Please see page 14 of the following manual for detailed instructions (including tools to use) in order to accomplish this procedure. You see, you have to lock up the gear drive so you can get the head back on the threaded end of the driveshaft.

http://www.echo-usa.com/pdf/documentation/SRM242410ES_042198.pdf

First off you have to have the blade conversion kit PN 99944200418 or 99944200418
Then you must install the kit that involves removing everything down to the angle drive mounting plate.

The blade conversion kit installation instructions are here:
http://www.echo-usa.com/pdf/documentation/99944200418%20422esf_070110.pdf

The conversion kit parts manual is here:
http://www.echo-usa.com/pdf/documentation/99944200415_011206.pdf

The users manual is here:
http://www.echo-usa.com/pdf/documentation/99944200411_101805.pdf

If by chance any of the links above do not work you can find them here: (except owners manual)
http://www.echo-usa.com/documentation.asp?Model=SRM-261T&lang=E&Type=ACC

Check out the manual (available under the technical documents section of the Echo webpage, or at http://www.echo-usa.com/documentation.asp?Model=SRM-210&lang=E )and it will tell you how to change it.

Did you try pushing down hard and turning @ the same time? that should do it.

I have the same model. Home Depot assembles their trimmers then sells them, so I didn't get the stuff that comes with it. A 3/16" punch works perfectly.

Don't know for sure, but I found manual on amazon, Amazon com echo srm manual so take a look if you want. have a nice day

I know I'm replying to a old post, but this might help others. My Echo GT225 might be similiar. Once u are down to the thread bolt & the round shaft part that spins in ither direction, u need to thread back on the line spool, at lest the botton part of it to hold the thread bolt in place. Then start turn that rounded part that normally just spins, it will start to thread off, as you are thrreading it off you may have to also start threading the line spool part off as well at the same time. After that you will need the tool that takes off the C ring clamp thing that's underneath. I couldn't find any info on this online, I just kept on playing with it until I figured it out, UGH.