High Quality Chainsaw Bars Husqvarna Toys

Echo Cs 730 hybrid build.

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
This is the saw Echo should make.

Started with the cs 590,600,620 chassis.
This one is a 600.

Made a .380" spacer with a flange to fit the case, and a counterbore to fit the jug extension.
d0f3707e831933e1856174412bc25f4b.jpg
fb5aec397d1f0e650b4532f1fae15c65.jpg
3805cbbc079a6dfa08ee83f76c3dfa07.jpg
8ebb6be1d99168b13ef02077283b545f.jpg


Sent from my SM-G950U using Tapatalk
 

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
Used a 50mm husky 268 window piston.

Had to cut approx. 040 out of the band to fit. With keeping the numbers close.

Jug is a 50mm echo 670. Center fed quad port.
8cd5c30f3fc3223102a8b0c2a4d3368b.jpg
464e28f0673d2ffb091d106d5f9b15d4.jpg
70c7656e20de700ef06a77976aba9787.jpg
34ea2c3eb1f34111879196baea1d47f0.jpg


Sent from my SM-G950U using Tapatalk
 

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
Made a spacer/adaptor flange to get the exhaust on the correct angle. And allow the use of a wider flange for the muffler. Which you can see took a bit of doing.
ac80dd72343322828df7c2e9f7ec624d.jpg
2b7ed74a909e10d1e39a12f55115945b.jpg
b3e2dfc44cb25f859a4f816de1460622.jpg
5b517415e3aa4cfda06ee171a9d203fe.jpg


Sent from my SM-G950U using Tapatalk
 
Last edited:

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
Made the flange, and the tube to start. Cut, weld, fold, bend till it fit where/how I wanted. Open up the side and cap it off with one of my medium reflectors. Finish off with high temp paint. Ain't super Purdy, but will do the job.
8e5efd056ede90bd4fa2639a7b968b2b.jpg
dde417fc0d1dc23975fde261051b88d4.jpg
07fccf80b22923c078ffb8f4519025c1.jpg
64c84378b0fe3c76f890a341d09a6d08.jpg
0f13ba29742267ee264864efce9e85e1.jpg


Sent from my SM-G950U using Tapatalk
 

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
Numbers with the 268 piston.

In 75.5
Ex 101
Tr 115

Widened the exhaust, and lowered the floor about .070 so the piston was above the floor at bdc. Matched the intake port to the 600 boot.
Opened up the lower tunnels to match the window in the piston.

5d6424b1a023b08c0afa2c9d291cc092.jpg
c23f174cabd2e9fb76374c440e5cf0d9.jpg
a03a1f4e44f72df8c8ed81fe2b68d509.jpg
858992c0f88f9007600af4d9688fa019.jpg
c8d1763699f87c8ea2775c2c51f22cfb.jpg
9732c59b4ff6fdc444ef1ace525fb669.jpg


Sent from my SM-G950U using Tapatalk
 

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
Intake boot needed a .080 spacer. That got clamped on on with motoseal for insurance. Little bit of clean up and assembly. Comp reading is fresh after assembly. No run time.
8b8f840c6ecff6bc5cb7864fa154437c.jpg
d3890a7871941eea569cb7d098ec3a7f.jpg
6a2a766f62269821ba1689e2c1f1a227.jpg
85b39ad14727001d54ca287368cb809e.jpg
2993aa6698b982defa52f4f08ce69953.jpg
0508ee89b7fe29294131ac4c770fae7d.jpg


Sent from my SM-G950U using Tapatalk
 

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
Ok, all together still need to mod the carb. Omit the bypass nozzle, so I can tune it normally. Still has the 13.5k limited coil.

So what was the point of this??? And why cs 730?

Well thus series has a long stroke small bore stock. 45mm bore 37.6 stroke 59.8cc

Now 50mm bore 37.6 stroke 73.8cc same package :)

Numbers aren't ideal imo, but I needed a baseline.

I have about .010-15 before the top of the piston ring gets into the ring of death at the top of the jug. I would really love to get the transfers up round 118-9 but would have to drop the jug .030-40 the piston ring is starting to get close to the snagging point at that depth.

bdff59b443266e7cb8225b557fd25f0d.jpg
d3185791a41f6f823d6927c20fce69ec.jpg


Sent from my SM-G950U using Tapatalk
 

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
You have some pretty cool stuff going on in your shop...

Thank you. Plenty to get side tracked with for sure.
I bet with that spacer and exhaust so far away she will have some torque.looks good.

Thank you.

I hope so. A ton of variables with this critter for sure.

Hda carb, limited coil, odd timing numbers. Where to go where to go. Lol
 

Cracker Boy

Fl cracker
Local time
10:28 AM
User ID
1359
Joined
May 31, 2016
Messages
4,301
Reaction score
7,590
Location
Florida
Thank you. Plenty to get side tracked with for sure.


Thank you.

I hope so. A ton of variables with this critter for sure.

Hda carb, limited coil, odd timing numbers. Where to go where to go. Lol
You are the echo whisperer lol.andy wellman aka westhouse saws builds a spacer on allmost all his builds calls it a grunt gasket.looking good.
 

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
Very cool. Love these crazy builds. Can't wait to see it cutting.
Thank you. Have some smaller test logs leftover from the 50cc saws. It's getting put in wood tomorrow...
You are the echo whisperer lol.andy wellman aka westhouse saws builds a spacer on allmost all his builds calls it a grunt gasket.looking good.
The spacer was mainly to correct the angle, while trying to attach to the stock muffler. That didn't work out, so super muffler mod it is.

If I were to do it over, I would have formed a horn shape into the can vs the oversize square. But to be honest the square was way easier, and somewhat resembles the stock deflector setup.
5419a27b6bca56ce45055157850976a8.jpg


Sent from my SM-G950U using Tapatalk
 

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
Forgot to mention the biggest part for this conversion..

The wrist pin bearing. The 599,600,620 uses a 11mm pin with the 268 is 12mm. Found a conversion bearing fits the rod, and 12mm pin prefect. Same bearing used to convert the 510 echo to the husky piston as well.

Sent from my SM-G950U using Tapatalk
 

Red97

Mastermind Approved!
GoldMember
Local time
10:28 AM
User ID
385
Joined
Jan 2, 2016
Messages
7,452
Reaction score
53,843
Location
MI
Country flag
I was wondering who this was that was showing this build in the chainsaw repair group :cool:. Very nice and thinking out of the box. :b1:
That be me. Thank you.
Nice work Joe.
Thank you. It feels really sporty. Need to try some longer bar buried cuts. Get the ring seated in before I tear it back down.

Sent from my SM-G950U using Tapatalk
 
Top