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.

[gerry]

Right enough, there's not much chance of starting a forest fire in somebodys garden!

Fatboy, do you mean the carb settings are set too rich, I thought about that but they are set as per service manual. I will check the 2 stroke oil, its Stihl but haven't looked too close at its label, I might lean the L and H screws a little bit. 

Thanks.

[GarethM]

Stihl green ?.

[gerry]

Its dark blue. I will check the morra.

[Fatboy2017]

If you're experienced in carb adjustment technique excellent, if not you could follow this procedure in the link below.  Again just in case you weren't aware, only cut with the engine on max throttle opening, not part throttle

 

[gerry]

I saw that video, its very like the way I do it.

Yes I always cut at full throttle.

I was wondering if it was from leaving it on idle for too long, I tend to do this up a tree.

My smaller Echo's do get a lot more use than the bigger Stihls and Husqy, that's the nature of pruning and dismantling domestic trees.

Thanks for the tips.

[gerry]

Its Stihl HP Super, doesn't have an FC or FD rating on the bottle. 

I have mixed up the free 100m of Echo stuff, Power Blend Gold, I got with the saw, its Jaso-FD.

I might get some more it a try from now on. 

I can use the Stihl stuff for my strimmer!

I noticed the Stihl Ultra is Jaso-FB

I checked the revs with my tach and they are bang on the manual specs, I never thought about the 2-stroke oil, I see all this JASO stuff is about reducing residual ash so that might be it. The thing is I have been using the Stihl Super for years in other saws and never had this problem, deffo don't want that carbon ash in the cylinder and piston!