New Echo CS-490

Arborist Forum

Help Support Arborist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
bikemike

bikemike

loud pipes save lives
Joined
Dec 16, 2012
Messages
3,945
Location
Cottage grove mn
The echo sounded much richer than the husky take a 1/16 to an 1/8 turn leaner on ur high end and repost a vid ur saw is hiding something that has not been revealed il try to get a vid made of the 50cc 510 at a proper tune tomorrow
 
bigredd

bigredd

ArboristSite Guru
Joined
Oct 28, 2008
Messages
804
Location
Knoxville, TN
Will work on the tune and see if I can redo. Any locals that would like to play around with the CS-490 get with me. I'm much better with the camera and talking than tuning and running saws.
 
cedarshark

cedarshark

Addicted to ArboristSite
Joined
Dec 11, 2009
Messages
1,853
Location
central Texas
Not the 490 but thought I would share the muffler mod as it must be similar. This is a CS450P that I bought seized as a project to compare Echo clamshells to Stihl. As the saw was completely broken down for a new piston, I took advantage of the opportunity to remove the carb limit caps open up the seriously choked muffler. This muff was interesting. The cat was moved to the side,I am sure to prevent guys like me from taking it out. I did not want to split the muffler to get at the cat, so I drilled two 17/32 holes in the baffle plate between the muff halves, opened the muff exit to 80% of the cylinder exhaust and ground the front half of the deflector off to open the deflector. I could have left the deflector off entirely but want to keep the exhaust off the brake handle and directed toward the front of the saw.
IMG_0954.JPG IMG_0956.JPG
 
osteoart

osteoart

candidate for CAD
Joined
Jan 4, 2013
Messages
107
Location
bluegrass
bigred or anyone, did you split the muffler? If so what was inside? On the Echo IPS site they show a " GUIDE, EXHAUST" which looks like a rectangular flange that the screen and cover attach to and a round pipe. Is this a cat muffler? I just got a 490. It came with a 20" bar so I'm pretty sure that I will need to MM and retune.
Anyone with help welcomed.
 

Latest posts

Top