Echo CS 501SX

[wicklamulla]

On 29/07/2019 at 15:54, wyk said:

It sounds like a carb tuning issue. Echo's can be fairly lean from the dealer sometimes.

But removing the baffle tube from the exhaust - it simply unbolts from the muffler outlet and slides right out, might help a bit too as it's rather restrictive on that model.

If you have an Echo chainsaw, you should also own a double 'd' tuning screwdriver to tune the carbs with. Bear in mind the Walbros on Echos tend to be sensitive to tuning, turn the driver in small increments and test the throttle and the saws response.

Opening the fuel tank in hot weather if a saw has been sitting helps on most any saw. Take the opportunity to top it off, as this will also cool the fuel in it. Er, unless you leave your fuel in the sun...which I don't suggest you do.

I may remove the baffle tube from my 501SX then as i have put a lot of fuel thru it and although it's a good lightweight saw 'it lacks the necessary minerals' despite removing the spark arrestor.  I had it tach'd after it had 1 tank of fuel thru it from new and it's 1800rpm below what Echo state it should max out at. I will report back my findings.

[wyk]

Can ya see if it's got a cat inside?

[Commando]

It sounds like a carb tuning issue. Echo's can be fairly lean from the dealer sometimes.
But removing the baffle tube from the exhaust - it simply unbolts from the muffler outlet and slides right out, might help a bit too as it's rather restrictive on that model.
If you have an Echo chainsaw, you should also own a double 'd' tuning screwdriver to tune the carbs with. Bear in mind the Walbros on Echos tend to be sensitive to tuning, turn the driver in small increments and test the throttle and the saws response.
Opening the fuel tank in hot weather if a saw has been sitting helps on most any saw. Take the opportunity to top it off, as this will also cool the fuel in it. Er, unless you leave your fuel in the sun...which I don't suggest you do.

Is removing the baffle tube recommended on 390 too? Does the carb need tweaking after? Thx

[wicklamulla]

6 hours ago, wyk said:

Can ya see if it's got a cat inside?

no cat inside this echo while my other 4 Echos do have them,  wonder why?  The exhaust on the 501SX is virtually an empty box.

Edited January 8, 2020 by wicklamulla

[wyk]

Is the 501 a strato saw?

 

On that 390 - it may have a cat in it as well.

 

[wicklamulla]

5 hours ago, wyk said:

Is the 501 a strato saw?

 

On that 390 - it may have a cat in it as well.

 

 

Dunno if it is a strato saw Wes,  i'll do some research and get back to ya.

[wyk]

20 hours ago, Commando said:

Is removing the baffle tube recommended on 390 too? Does the carb need tweaking after? Thx

The 390 I had came with a cat and no tube.

[wyk]

6 hours ago, wicklamulla said:

 

Dunno if it is a strato saw Wes,  i'll do some research and get back to ya.

Yeah, about those TPS reports....