Echo String Trimmer

[rb_in_va]

I have an Echo string trimmer, and got a brush cutter kit for it like at the link below. It doesn't fit. Is there an adapter for it somewhere?

ECHO 8 in. x 8-Tooth Grass Blade and 20mm Blade Kit for Echo-99944200422 at The Home Depot

 

[Swamp Yankee]

Little more info please.

What model Echo and exactly what is the issue? Spindle length or threads, arbor diameter, etc.

Take Care

 

[rb_in_va]

Sorry, I was in a hurry when I typed that earlier post! My trimmer is an SRM 210. The directions show a splined arbor, and mine is not splined. I'm not sure the diameter of the spline, but can measure it in a bit.