Could you please explain how I change from the nylon line trimming head to the metal cutting blade on my Echo brush cutter model SRM-22GES? Thanks for your help.

There is a hole just above the grass trimming head that you can slip a screw driver into. Turn the head so that the inner and outer holes align where you can put a screw driver or other hard steel object in. Put it in there and then turn the head counter clock wise until it comes off, it may take a little effort to get it to move, but you should be able to do this with your hands. Once you get the trimmer head off, put the blade on and hopefully you still have the nut and washer accessories to hold the blade in place. You will need to place your screw driver back in the alignment hole to hold the head from spinning while you tighten the blade nut back down. Make sure it is tight, you don't want that blade coming off at ~10,000 rpm!

The nylon head should pop off by clicking on two pins holding it to the main body. Once it pops off you should be able to reload it and push back to those clips again

Here is a PDF of your owner's manual. Please see page(s) 28 for directions and diagrams on this the string head.

http://dl.owneriq.net/b/b429b291-746b-66e4-1d8f-e9ed6237be81.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

Look at page 12 of the pdf document:
http://www.echo-usa.com/pdf/documentation/SRM210ef07_112803_1.pdf

You may be able to download an owners manual here as your model is a very popular one and they may have it.
http://www.manualsonline.com/
Stringing the head info should be in the manual.

Universal kits are available that will allow you to attach a brush cutter blade to just about anything that usually has a line head. The kit contains a selection of bolts, adapters, packing washers etc - you simply select the parts you need to attach the blade. The blade itself is not machine specific.

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

Get the brand name and #'s of the carb. and go to that web site and order one. Also try napa they also have some kits. donnyb60