Buy Used Saws CCC Ebay Store

Echo Cs 730 hybrid build.

Discussion in 'Chainsaws' started by Red97, Dec 6, 2017.

  1. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    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.[​IMG][​IMG][​IMG][​IMG]

    Sent from my SM-G950U using Tapatalk
     
  2. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    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.[​IMG][​IMG][​IMG][​IMG]

    Sent from my SM-G950U using Tapatalk
     
  3. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    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.[​IMG][​IMG][​IMG][​IMG]

    Sent from my SM-G950U using Tapatalk
     
    Last edited: Dec 7, 2017
  4. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    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.[​IMG][​IMG][​IMG][​IMG][​IMG]

    Sent from my SM-G950U using Tapatalk
     
  5. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    Had to trim a few fins at the top of the jug, nothing too major tho. Here you can see the angle of the dangle.[​IMG][​IMG]

    Sent from my SM-G950U using Tapatalk
     
  6. jacob j.

    jacob j. Mastermind Approved!

    Joined:
    Dec 24, 2015
    Messages:
    4,715
    Likes Received:
    31,671
    Trophy Points:
    583
    Location:
    Beezlebubba
    You have some pretty cool stuff going on in your shop...
     
  7. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    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.

    [​IMG][​IMG][​IMG][​IMG][​IMG][​IMG]

    Sent from my SM-G950U using Tapatalk
     
  8. Cracker Boy

    Cracker Boy Fl cracker

    Joined:
    May 31, 2016
    Messages:
    4,301
    Likes Received:
    7,572
    Trophy Points:
    335
    Location:
    Florida
    I bet with that spacer and exhaust so far away she will have some torque.looks good.
     
  9. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    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.[​IMG][​IMG][​IMG][​IMG][​IMG][​IMG]

    Sent from my SM-G950U using Tapatalk
     
  10. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    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.

    [​IMG][​IMG]

    Sent from my SM-G950U using Tapatalk
     
    thedude74, chipper1, Sleeper and 23 others like this.
  11. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI


    Proof of life.

    Sent from my SM-G950U using Tapatalk
     
  12. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    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
     
  13. Backtroller

    Backtroller Pinnacle OPE Member

    Joined:
    Dec 31, 2015
    Messages:
    2,432
    Likes Received:
    9,383
    Trophy Points:
    345
    Location:
    Land of Badgers
    Very cool. Love these crazy builds. Can't wait to see it cutting.
     
    Cracker Boy and Red97 like this.
  14. Cracker Boy

    Cracker Boy Fl cracker

    Joined:
    May 31, 2016
    Messages:
    4,301
    Likes Received:
    7,572
    Trophy Points:
    335
    Location:
    Florida
    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.
     
    thedude74, Dub11 and Red97 like this.
  15. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    Thank you. Have some smaller test logs leftover from the 50cc saws. It's getting put in wood tomorrow...
    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. [​IMG]

    Sent from my SM-G950U using Tapatalk
     
    thedude74, chipper1, mdavlee and 10 others like this.
  16. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    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
     
    smokey7, thedude74, chipper1 and 20 others like this.
  17. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI


    Tuned just at 13k lots of pressure to clean up.

    Sent from my SM-G950U using Tapatalk
     
  18. Cut4fun

    Cut4fun Redneck Chainsaw Repair

    Joined:
    Dec 23, 2015
    Messages:
    3,491
    Likes Received:
    12,225
    Trophy Points:
    378
    Location:
    Ohio
    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:
     
    thedude74, DrewUth, chipper1 and 5 others like this.
  19. Redfin

    Redfin Meh...

    Joined:
    Dec 24, 2015
    Messages:
    6,331
    Likes Received:
    31,901
    Trophy Points:
    510
    Location:
    Central Pa
    Nice work Joe.
     
    thedude74, chipper1, hseII and 3 others like this.
  20. Red97

    Red97 Mastermind Approved!

    Joined:
    Jan 2, 2016
    Messages:
    4,899
    Likes Received:
    28,926
    Trophy Points:
    510
    Location:
    MI
    That be me. Thank you.
    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
     
Loading...

Share This Page

Loading...
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice