Just another junk chainsaw

[xyz123]

Echo and Shindiawa merged to form Yamabiko corporation. Dec 2008.

IMO the Shin design and saws saved echo. You can buy them in red too under shin name. Least some of the better selling ones in US. Chainsaws | Shindaiwa-USA.com

 

[two_bit_score]

What I find somewhat interesting is, the Echo is almost an exact copy of the Japanese Tanaka (no longer made), top handle arborist saw, right down to the air cleaner cover. I believe Makita bought Tanaka and discontinued the saws but I could be wrong. My buddy has one (Tanaka top handle), nice saw. It certainly was a lot less than the Stihl top handle that I crushed.

If I could get a Tanaka saw from a local dealer I would buy it in a heartbeat. They made good quality trimmers. I feel like their saws would be as good also.

 

[5030]

All I see anywhere are parts, no complete saws. I know my buddy will never part with his. I believe once Makita absorbed them, that was the end for their saw line.

The Echo could be an exact copy actually.

 

[5030]

Kind of wondering if I'll have to dremel the muffler. It's pretty quiet.

 

[xyz123]

Kind of wondering if I'll have to dremel the muffler. It's pretty quiet.

Havent seen a newer echo to date that didnt benfit from a muffler mod. GL

Guy I knew had 2511 271 355.

 

[5030]

I will then.... No big deal.

 

[tradosaurus]

Havent seen a newer echo to date that didnt benfit from a muffler mod. GL

Guy I knew had 2511 271 355.

View attachment 779166

How do you do the muffler mod?

 

[tradosaurus]

You add the 272 o-ring like said above and shown in pic.

What is a 272 o-ring? Source? Thanks.

 

[two_bit_score]

Havent seen a newer echo to date that didnt benfit from a muffler mod. GL

Guy I knew had 2511 271 355.

View attachment 779166

A training video would be great!

 

[xyz123]

A training video would be great!

Thats for the younger crowd to do those video's.

 

[two_bit_score]

Thats for the younger crowd to do those video's.

A few pictures then?

 

[xyz123]

A few pictures then?

Of what?

2 with muffler mod I took on trade 490 and 372. 2 with pipes in them were local trade ins. I dont do pipes on mine myself. So many different ways and so many different muffler sthls with their own problems.

290-390 sees the most from a 30min muffler mod I have timed before.

Just open under stock deflectors or add a deflector or gil them. Called caveman muffler mod that is free.

 

[cqaigy2]

I did muffler mod and carb adjustment on my stihl. To be honest i think the carb adjustment was the biggest difference, but my saw is pretty old. The muffler mod was seemed slightly louder and maybe a bit quicker rev and slightly higher rpm, but i did it many years ago and might not remember exactly.

 

[5030]

Unless the saw has an expansion chamber, the easiest method to gain power is to let the exhaust be free flowing.

 

[gstrom99]

I've really never seen the need to mod my saws. They've always seemed strong/fast enough for what I was cutting. Keeping a sharp chain has always been my priority.

 

[WranglerX]

I've really never seen the need to mod my saws. They've always seemed strong/fast enough for what I was cutting. Keeping a sharp chain has always been my priority.

Ditto's on sharp chain....

 

[Snobdds]

Unless the saw has an expansion chamber, the easiest method to gain power is to let the exhaust be free flowing.

2 strokes need moderate backpressure.

Do an experiment...

Sneeze into two cups. One cup has the entire bottom cut out. The other has a 1"x1" square cut in the end.

Which one has the higher exit velocity?

 

[LD1]

2 strokes need moderate backpressure.

Do an experiment...

Sneeze into two cups. One cup has the entire bottom cut out. The other has a 1"x1" square cut in the end.

Which one has the higher exit velocity?

I disagree

 

[Snobdds]

I disagree

deep and interesting...

 

[Snobdds]

Two-stroke exhaust is part science and part art, as far as I can tell. A properly set up system not only scavenges the burnt charge from the combustion chamber, it directs a "reverse" pressure pulse to keep the incoming charge in place.

I have read that a 2cycle has a "secondary" compression ratio, that of the fuel air mixture in the crankcase. When backpressure is too low the mixture can exit the cylinder w/o burning called short circuiting or "4 cycling". An expansion chamber takes advantage of sound waves which travel through the exhaust pipe faster than the spent gases and both pull the gases out and when they return back toward the exhaust port help hold the next fresh charge in the cylinder.