Echo cs 590,600,620 porting/mod/build thread

[Ozarker]

In case it's not known, that tube in the muffler is welded at the bottom and the top. It's not a matter of cutting around the tube at the top, and just sliding the tube out. At the bottom, the tube is welded to a baffle plate. That plate has holes in it that let the exhaust pass through, into another chamber, then out the tube.

 

[drf256]

Red,

I'd personally raise the exhaust side transfers to 125 and the intake side to 126 with the intake of 80 and exhaust of 105.

You're gonna open the muffler. You're filling a larger/taller cylinder with charge and you have 4 ports.

The 19-20* on the 620 tells me that the muffler is restricted and the cylinder needs more time to fill.

You can always leave the transfers at 135 to start. You can always raise them but you can't lower again.

Cut the ex side uppers with a squarer entry than the mains.

So with a 125 tranny , you'd be at (in duration):
Int 160
Ex 150
Tr 110

Now that I see it more clearly, I bet your saw could handle an exhaust of 102 and sill make aLot of torque.

 

[echoshawn]

As promised, my muff mod on my 600p

Just cut down the front deflector to open it up.

Just drilled a hole next to the existing hole, and still under the spark screen since all my cutting is done in the national forest.

 

[jake wells]

you need ear plugs if you gut the mufflers and mod the deflectors on these, they are LOUD.

 

[echoshawn]

Reviving this thread.. Lol. Local dealer has 590s for cheap.
See link below.
http://spokane.craigslist.org/fod/5505306414.html

 

[rattler]

Reviving this thread.. Lol. Local dealer has 590s for cheap.
See link below.
http://spokane.craigslist.org/fod/5505306414.html

That is a good buy

Sent from my XT1060 using Tapatalk

 

[echoshawn]

Reviving this thread.. Lol. Local dealer has 590s for cheap.
See link below.
http://spokane.craigslist.org/fod/5505306414.html

Granted, shipping and local sales tax knocks a lot of the value out..
If someone wanted one, I'll help out

 

[jake wells]

Granted, shipping and local sales tax knocks a lot of the value out..
If someone wanted one, I'll help out

buy it and send it to me i got a nice poulan wildthing you can have think of it as a even trade.

 

[echoshawn]

buy it and send it to me i got a nice poulan wildthing you can have think of it as a even trade.

These boys would eat that poor wild thing...

 

[jake wells]

yeah but the 590 would spank them all.

 

[echoshawn]

Much as I love my 600, and as good as it runs, that big 4900 on the right would spank it hard without breaking a sweat.

 

[jake wells]

i dont mess with poulans because they never run for me and the older saws the manual oiler never worked right or didn't work at all. i will stick to my echos and husqvarnas.

 

[BGE541]

Anyone have stock 600p #s?

 

[rattler]

Red would be your best bet Reed.

Sent from my XT1060 using Tapatalk

 

[Four Paws]

Anyone have stock 600p #s?

@awol

 

[Red97]

Anyone have stock 600p #s?

I really want to say the 590 and 600 share the same cylinder part # but not 100%

Sorry for the delay with this thread, still waiting on case gaskets.

Should be there by the time I get back home late next week.

 

[awol]

Anyone have stock 600p #s?

EX113 IN78 TRANS133

 

[Red97]

EX113 IN78 TRANS133

Very close to the 590, could just be the way I was reading the wheel.

 

[awol]

For the record, I read the 590 as:

EX113 IN77 TRANS128

 

[Jughead]