Echo CST-610EVL Questions

[Dylan Hazeltine]

It's been a while since I posted, but I recently acquired a beautiful old CST-610EVL. I've done a partial tear down and checked compression. Pulling well over 120psi in both cylinders, nice and clear exhaust and clean barrels. It will pop a few times but I can't seem to keep it running more than a few seconds. Has anyone had luck with a newer carb swap? Finding an old HDA-7 is proving very difficult.

 

[Modifiedmark]

Why swap the carb? HDA carbs are easy to rebuild. Did you put a new fuel line and filter on it?

 

[Dylan Hazeltine]

New fuel lines and filter. I think I'm going to do a full tear down and rebuild from the case up just to be sure.
Was mainly asking to see if anyone else had attempted it.

 

[Modifiedmark]

I have one, never seen a reason to swap, just rebuilt the original. Most HDA's are good carbs. If its in the shape you say, just put crank seals in it and rebuild the carb.

 

[av8or3]

I’m with him. Just build the carb you have. It’s easy. Also, I replaced a case half on one recently and the case halves just slid off the crank. Was awesome! No splitter required.

 

[Screwbolts]

I have one, never seen a reason to swap, just rebuilt the original. Most HDA's are good carbs. If its in the shape you say, just put crank seals in it and rebuild the carb.

I am with Mark on this also the HDA is a very good carb and used on many of the Echos saws. I do recommend you get a Walbro OEM kit and not one of the cheaper chinese clone kits that they say will fit the HDA, I have found the wrong diaphragms, and gaskets in the chinese kits. the A, D, and C versions of the Walbro HD series all take slightly different packages.