Echo CS-3510ES

[gerry]

I have been using my new Echo CS-3510 for about six months now and it has been great, very light and powerful. I replaced the 14 inch bar with a 12 inch from my old CS-281WES and its been very good for climbing and limbing. The problem is I have had to clean the spark arrestor screen twice now, the saw had a big drop in power and the screen was coked up badly. That's twice in six months, I don't remember having to do that on a chainsaw before.

The carb settings are standard as in the service manual. 

Any ideas?

[billpierce]

Personally I'd just remove it

[Mark Bolam]

As above.

[Fatboy2017]

The 2 stroke oils you are using can effect this. Try to use FD spec oil, or at least FC. Typically these are Echo oil, Husky Motul plus others. ( some of the Stihl oil are not even FD spec so be careful!) Try not to use the cheaper generic oils. I always use the term 'oil is cheaper than metal' . Also the mixture maybe set too rich causing unburnt fuel exiting the motor, plus if carbon is building up it on the screen it is usually building up on the piston and rings as well.