The Forestry Forum is sponsored in part by:

TURBOSAWMILL GIANT SALE ON NOW UNTIL OCTOBER 31st


Forestry Forum
Sponsored by:


TimberKing Sawmills



Toll Free 1-800-582-0470

LogRite Tools



Norwood Industries Inc.


Sawmill & Woodlot Magazine



Your source for Portable Sawmills, Edgers, Resaws, Sharpeners, Setters, Bandsaw Blades and Sawmill Parts

EZ Boardwalk Sawmills. More Saw For Less Money!

STIHLDealers.com sponsored by Northeast STIHL


Woodland Sawmills

Peterson Swingmills

 KASCO SharpTech WoodMaxx Blades

Turbosawmill

Sawmill Exchange

BRUTE FORCE Authorized Dealer

Woodshax Outdoor Vending Solutions

FARMA


Council Tool

Baker Products

ECHO-Bearcat



Author Topic: Echo CS501SX carb adjust and muffler mod  (Read 338 times)

0 Members and 1 Guest are viewing this topic.

Offline Greenerpastures

  • Full Member
  • **
  • Posts: 68
  • Location: Unknown
  • Gender: Male
  • I'm new!
    • Share Post
Echo CS501SX carb adjust and muffler mod
« on: September 13, 2018, 05:33:32 PM »
Hi everyone
I got a new CS501SX and set about examining the muffler.
I did not remove it, just took of the shield, took out the screen
and took out the piece of pipe that sites into the muffler.

I could see the cylinder port looking through the muffler outlet,
so obviously no cat in there that I could see.
So am a bit puzzled as to how they are meeting the epa regulations.

None the less, in an attempt to keep the saw cooler I drilled two 5mm
holes on the forward facing side of the muffler deflector, and filed them to
form a slot of 11mm in height by 5.5mm in width.
The saw is new so I left in the piece of pipe and put all back together.
Saw started as normal, there was a slight hesitation to rev which was there
since the saw came, so I adjusted the low to eliminate that, I let her warm up
and she revved slightly more than she used to, which in my opinion was too high
for a new saw, I had one of these new earlier this year, it came new, and only revved
to about 10,600 rmp when she came, my new one went to 12400 so I adjusted her
back to 11,400, I lost my original documentation on how I adjusted my first CS501SX,
so am wondering if anyone has put a tack on theirs when new, and could advise a sensible
number for this run in period.

This new echo though identical model seems different than my first one, which I since sold,
there was a fair difference between the settings of each of them, so am guessing the shop
I bought of has something to do with this, I know two different mechanics set them up
so this could be the reason.

Does anyone know if there is a limiter on these saws and what it cuts in at,
it certainly does not seem to have cut in on this new saw at 12,400,
the specs say they can go up to max of 13,700 which I certainly wont
be approaching.

Any advise on a good initial setting would be appreciated, so far I have no unburnt fuel
coming out the exhaust, so am quite certain am not extremely rich with the current settings,
I also plan on removing the tube inside the muffler when the saw is run in and am happy
with her, she just barely four-strokes, I remember having trouble getting the last one to four
stroke, thus I got the tachometer.

One other comment regarding the current settings, initially she would bog slightly after
starting, a rev or two and that would be gone, now she certainly doesn't bog as much afer
a 1/8 turn out on the low,
the saw also initially would rev in two steps almost, hold the throttle on full and she picked
up well then it was like a turbo kicking in, this does not happen now, owing to me turning
the H out 1/4 turn and then another small amount which I marked on the body of the saw,
she takes off better now and continues with just a slight kick compared to before.

Any comments on my adjustment welcomed, should I lean her out or leave her until I remove
the pipe from the muffler after a half dozen tanks. I hate moving the screws unless they need
it as they can come loose with too much unnecessary adjusting, and if I find its good idea to
remove that pipe inside the muffler that will help her breath and lean her a little at the same
time through any extra speed she picks up.

Thanks to all.

Offline Greenerpastures

  • Full Member
  • **
  • Posts: 68
  • Location: Unknown
  • Gender: Male
  • I'm new!
    • Share Post
Re: Echo CS501SX carb adjust and muffler mod
« Reply #1 on: September 14, 2018, 03:25:09 AM »
Anyone care to comment, has anyone removed the small insert pipe
from the mouth of the muffler outlet, will taking this out cause trouble
as regards to how things flow, good or bad idea to remove this pipe,
and does one need to re tune after
removing this pipe as the flow should have improved slightly.

Is 11,400 too low for wot out of wood, given 13,700 is max spec.

Thanks

Offline Greenerpastures

  • Full Member
  • **
  • Posts: 68
  • Location: Unknown
  • Gender: Male
  • I'm new!
    • Share Post
Re: Echo CS501SX carb adjust and muffler mod
« Reply #2 on: September 14, 2018, 09:14:23 AM »
Am heading for a record here, over 150 views and no comments,
is my english, or are these saws not so popular.
In any event, she starts like a champ, slight fire on the second pull
with the choke on, two more pulls and she takes off, so I guess my
settings are quite good for initial set up, couple of revs, stop her
barely warm, couple minutes later, starts right up with no choke as 
she should.
Monday I will put her work and adjust from there, my friend has a
Stihl 251 which will be good to compare her with, that thing screams,
wicked throttle response and really steady in the cut, I hope to atleast
keep up.

Feel free with any tips regarding the removal or not of that short pipe
the fits into the muffler outlet, can it be taken out without adverse effects,
the goal being to allow the saw to breath and run cooler.

Offline Hilltop366

  • Senior Member x2
  • *****
  • Posts: 2147
  • Location: Nova Scotia
  • Gender: Male
    • Share Post
Re: Echo CS501SX carb adjust and muffler mod
« Reply #3 on: September 14, 2018, 09:22:54 AM »
Looks like you are breaking new ground but sounds like you have it under control.

Offline Greenerpastures

  • Full Member
  • **
  • Posts: 68
  • Location: Unknown
  • Gender: Male
  • I'm new!
    • Share Post
Re: Echo CS501SX carb adjust and muffler mod
« Reply #4 on: September 14, 2018, 09:57:04 AM »
Hi Hilltop336
Am getting there, am not far away with my settings, and can lean out
when I see whats what.

What am most unsure about is the removal or not of the small tube
that sits into the muffler outlet, Echo must have a reason for it being 
there, this is why am curious as to whether anyone has just taken it
out, and how that worked for them. I just don't want to go to the
work of taking it out, retuning and end up with less power or more heat,
as I have no idea what that tube is for.

Thanks

Offline John Mc

  • Senior Member x2
  • *****
  • Posts: 4799
  • Age: 56
  • Location: Monkton, Vermont
  • Gender: Male
    • Share Post
Re: Echo CS501SX carb adjust and muffler mod
« Reply #5 on: September 14, 2018, 08:56:18 PM »
sounds as though you have a god idea on the tuning, but my guess would be that 10,400 or 11,600 out of the wood seems really slow for a saw rated at 13,700.

Personally, I don't go by the tach, I judge by the sound: four-stroking out of the cut that cleans up under load. Madsens has a good write up of tuning by ear, with an audio file so you can hear the sound as they tune it. Go to Madsen's Chainsaw Maintenance page and click on the Saw tuning link. You'll want some good speakers or headphones to listen. Some laptop speakers are too cheap to play the sound clearly enough to hear it well.
If the only tool you have is a hammer, you tend to see every problem as a nail.   - Abraham Maslow

Offline kenskip1

  • Full Member x2
  • ***
  • Posts: 215
  • Age: 62
  • Location: Waynesville Missouri
  • Gender: Male
  • Stihl Looking for the fountain of middle age.
    • Share Post
Re: Echo CS501SX carb adjust and muffler mod
« Reply #6 on: September 14, 2018, 10:15:30 PM »
Echo 550 SX Well sir for one this is not a very popular saw. That is why I own a CS550P. (professional) My dealer had a clearance sale and he was literally giving them away. It seems as if the saw frame was larger for the displacement but that it could be fitted with a larger size engine.Anyay I enjoy using mine.Also this saw has a accelerator pump. Like you mentioned the muffler is basically a hollow box. I adjusted the deflector on top of the muffler. It now breathers very well. Anyway they stopped making this model.However I like it. I'm running a stock 325 .050 on a 20 inch bar. It will send the chips flying.
Stihl The One
Stihl Going Strong
Stihl Looking For The Fountain of Middle Age

Offline ladylake

  • Senior Member x2
  • *****
  • Posts: 4810
  • Age: 66
  • Location: grey eagle mn
  • Gender: Male
  • I need to edit my profile!
    • Share Post
Re: Echo CS501SX carb adjust and muffler mod
« Reply #7 on: September 15, 2018, 05:51:06 AM »

 The 501 and 550 are totally different saw, the 501 is the lightest pro saw you can buy right now. Yes pull that tube out of the muffler, I think Echo puts it in there to get by emissions.. Open up the deflector also as its really clogged up.  Pull the limiter caps and tune so you have good throttle response and the  so it 4 stroke out of the cut and cleans up soon as you lean on it a bit.  Be careful on the high, if tuned too lean it will sound like 4 stroking .  I start way rich then gradually back in until it cuts the fastest in bigger wood.  These are really good saws with real good power after they get broke in good which might take 10 tanks to really wake up.  Steve
Timberking B20 12000 hours +  Case75xt grapple + forks+8" snow bucket + dirt bucket   770 Oliver   Lots(too many) of chainsaws, Like the Echo saws and the Stihl and Husky     W5  Case loader   1  trailers  Wright sharpener     Dino setter Volvo MCT125c skid loader

Offline John Mc

  • Senior Member x2
  • *****
  • Posts: 4799
  • Age: 56
  • Location: Monkton, Vermont
  • Gender: Male
    • Share Post
Re: Echo CS501SX carb adjust and muffler mod
« Reply #8 on: September 15, 2018, 08:53:48 AM »
Steve -

That is an impressive weight for a 50cc saw. The pro-grade Husqvarna 550XP and Stihl 261 are both 10.8# (these are all specs. I have not looked in to what the actual weights are). The price is certainly nice on them as well.

I do find it strange that Echo doesn't list the HP in their specs. Do you know what it is? The 550XP is 3.75 HP, and the 261 is 4.0 HP. (I suspect torque curves might be more interesting, but no one seems to make those easily available.)

Small differences in HP generally do not end up being all that noticeable to me, and are no guarantee of which saw actually cuts better, but still, it's interesting to look. It's curious that Echo chooses not to list that information.
If the only tool you have is a hammer, you tend to see every problem as a nail.   - Abraham Maslow


Share via delicious Share via digg Share via facebook Share via linkedin Share via pinterest Share via reddit Share via stumble Share via tumblr Share via twitter

xx
Homelite carb adjust

Started by bandmiller2 on Chainsaws

2 Replies
1401 Views
Last post December 21, 2009, 01:17:32 AM
by sharkey
xx
Echo 310 muffler mod

Started by Wchafee on Chainsaws

8 Replies
1551 Views
Last post May 14, 2014, 09:40:26 AM
by LeeB
xx
ms441 carb & muffler mod

Started by yamaracer on Chainsaws

2 Replies
686 Views
Last post July 07, 2017, 07:32:51 AM
by PNWRusty
xx
Echo CS-440 muffler removal

Started by Ga Mtn Man on Chainsaws

5 Replies
1298 Views
Last post May 20, 2015, 12:01:27 PM
by SlimJim
 


Powered by EzPortal