Buy Used Saws CCC Ebay Store

The Cut Report - After the Bench

Discussion in 'Chainsaws' started by Stump Shot, Oct 5, 2016.

  1. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality Staff Member

    Joined:
    Jun 5, 2016
    Messages:
    18,648
    Likes Received:
    109,194
    Trophy Points:
    763
    Location:
    Northwoods of Wisconsin
    This thread is to compliment the "What's on your bench thread". Post the results of how your OPE repair went, good and bad. How did your work perform, what worked, what did not. Looking to compare repairs or modifications here, not saw brands etc.
     
  2. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality Staff Member

    Joined:
    Jun 5, 2016
    Messages:
    18,648
    Likes Received:
    109,194
    Trophy Points:
    763
    Location:
    Northwoods of Wisconsin
    Recently pulled this Poulan 306A off the bench last night for a piston replacement. Took saw out this morning and put it in some newly delivered wood. Did get it four stroking just before the rain started in. Seems to have good compression even with a scored cylinder. Chain needs a trip through the grinder otherwise I think this repair went pretty good considering the circumstances. Engine does seem to pull the 16 inch bar really good, probably could handle a bit more I bet. Well, at least it's back in the useful category which it had not been in for years.

    IMG_20161005_095804_947.jpg
     
  3. Simondo

    Simondo Here For The Long Haul!

    Joined:
    Feb 7, 2016
    Messages:
    3,265
    Likes Received:
    10,101
    Trophy Points:
    378
    Location:
    UK
    Glad that worked out for you ..give it a tank or two then see if you think it gets a scooch stronger.
     
  4. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality Staff Member

    Joined:
    Jun 5, 2016
    Messages:
    18,648
    Likes Received:
    109,194
    Trophy Points:
    763
    Location:
    Northwoods of Wisconsin
    Did notice a bit more "Blue" in the exhaust than I normally see with my saws, but I think this is going to be expected with the cylinder suffering this type of wound. This being the only side effect noticed so far. The only other repairs made were a new carburetor kit, fuel lines and filter. Had to put sealant on the gas tank top as I could not find a replacement gasket at the time. Also can not help but think of all the cylinders that were in better shape than this one that I discarded in the past. Could have surely saved some of them with the Mastermind methods I learned here at OPE forums.
    Also was interesting(at least to me) to see the different things being tried back when this saw was made like, swirl combustion chamber, reed valve cage straight to crankcase, dual exhaust ports, domed piston with closed end on piston pin to seal it off(goes by exhaust port).
    Another interesting note, when talking to my cousin about this over coffee, he replied to me, that it only needs 3/8" minimum to make compression and run. Which it is too late for me to measure where the scoring stopped, but I think it was a bit taller than that by looking at the demolished piston. Guess proof is in the pudding.

    IMG_20161004_090141_525.jpg
     
  5. Simondo

    Simondo Here For The Long Haul!

    Joined:
    Feb 7, 2016
    Messages:
    3,265
    Likes Received:
    10,101
    Trophy Points:
    378
    Location:
    UK
    Sure is a place full of good folks with plenty of no how.
    Think you can lose a bit of compression by way of the score line from just above the trans port ....the volume above the piston may diminish until the ring passes damage of any consequence and some of the volume is fuel charge. Thats my thoughts on it but from what you have said the saw is doing just fine for a old one that parts are not easy to find.
     
    p61 western, Sty57 and Stump Shot like this.
  6. jake wells

    jake wells no longer here

    Joined:
    Dec 28, 2015
    Messages:
    8,302
    Likes Received:
    19,424
    Trophy Points:
    426
    Location:
    ky
    poulan 306a parts are still available but it usually takes a month of sundays to get them.
     
    Simondo likes this.
  7. MustangMike

    MustangMike Mastermind Approved!

    Joined:
    Dec 30, 2015
    Messages:
    8,383
    Likes Received:
    24,849
    Trophy Points:
    513
    Location:
    Brewster, NY
    Recently fixed 4 saws for a local tree guy:

    MS460 just needed a tune up, was running poorly due to plug & fuel filter.

    MS461 had a broken piston on the intake side. There was debate on this site about what did or did not cause it, but I filed down the impulse nipple before putting it back together.

    2 MS660s, one had a rebuilt carb that the shop adjusted the float lever wrong, was only about 1/32 too high, but flooded the engine in the cut. The 2nd one needed a new piston, heat failure on the exhaust side.

    Thanks to Randy's method, I was able to restore the two scored cylinders and bring the saws back to life.

    All 4 saws got dp muffler covers and had the limiters removed from the carbs, with Hi screws adjusted just over a turn out.

    We are going to see if his saws hold up longer with these mods to enable them to run a bit cooler.
     
  8. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality Staff Member

    Joined:
    Jun 5, 2016
    Messages:
    18,648
    Likes Received:
    109,194
    Trophy Points:
    763
    Location:
    Northwoods of Wisconsin
    Some parts are still available for the 306A, most are not. of the three gaskets I ordered only the base gasket came in the rest were NLA. While the cylinder is listed as available(at least until you actually try and order one), was a bit over what the saw is worth let alone my budget for "fun" type projects. Think I paid $75.00 for a NOS piston and rings(also NLA, and he knew it), adding another $150.00 for a cylinder and having to wait for it while the saw is torn apart just did not sit well with me at the time. Think everything worked out OK for time being as this saw is just another play toy for me in the "antique fleet".
     
    smokey7, p61 western, Basher and 2 others like this.
  9. TJ the Chainsaw Mechanic

    TJ the Chainsaw Mechanic Old Homelites rule!

    Joined:
    Jan 7, 2016
    Messages:
    4,629
    Likes Received:
    8,904
    Trophy Points:
    373
    Location:
    Next to my bench at the shop, Oregon
    Great thread. Most of my repairs are fuel system related so nothing special. If I ever get something interesting I'll post it. lol
     
  10. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality Staff Member

    Joined:
    Jun 5, 2016
    Messages:
    18,648
    Likes Received:
    109,194
    Trophy Points:
    763
    Location:
    Northwoods of Wisconsin
    Please do not think you have to have some crazy example of something to share here. I think you hit the nail on the head here, if fuel related issues are most common, than that should be reflected here. All kinds of people here are at all kinds of different levels. I see people here all the time trying to diagnose fuel problems for the first time in their life. So please feel free to post about any repair, modification, success or failure, mundane or exotic, special and nothing special. Every experience can be learned from.
     
  11. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality Staff Member

    Joined:
    Jun 5, 2016
    Messages:
    18,648
    Likes Received:
    109,194
    Trophy Points:
    763
    Location:
    Northwoods of Wisconsin
    Today's cut report; not too good! Was cutting the rest of the pile of wood I started yesterday, ran the Poulan 306A with a freshly sharpened chain long enough to be happy with it. So I broke the 272xp back out to "get real" was doing fine cutting and moving wood out of the way for when the splitter comes back. I went to restart the saw and KAPOW! Blew the fargin' muffler apart at the seams. What the...How in the...Oh...Definitely a first for me. Was shooting exhaust up at the top cover so I decided to use lever B and got another saw. Finished last large log with 281xp as I wanted to see how the new skip tooth chain worked. Cut really well even with the 32" bar buried. Problem arose when I pulled it out of a cut, the holes I drilled in the end for a helper handle and auxiliary oiler had the bar hung up being full of chip. Guess a new bar is in order and save the other just for milling.
    I still can't believe my 272 is back on the bench, it was running so good...

    IMG_20161006_170554_549.jpg
     
    smokey7, AlfA01, peter92 and 5 others like this.
  12. MustangMike

    MustangMike Mastermind Approved!

    Joined:
    Dec 30, 2015
    Messages:
    8,383
    Likes Received:
    24,849
    Trophy Points:
    513
    Location:
    Brewster, NY
    Sorry to hear about your 272, I have a soft spot for 70 cc saws! Hope it is running again soon.
     
    Stump Shot likes this.
  13. Mastermind

    Mastermind Leader Of The Clique Staff Member

    Joined:
    Dec 3, 2015
    Messages:
    23,216
    Likes Received:
    133,112
    Trophy Points:
    931
    Location:
    Banner Springs Tennessee
    Excellent thread. :)
     
    peter92, Glock37, MustangMike and 2 others like this.
  14. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality Staff Member

    Joined:
    Jun 5, 2016
    Messages:
    18,648
    Likes Received:
    109,194
    Trophy Points:
    763
    Location:
    Northwoods of Wisconsin
    Gave this MS440 a bit of run today, as well as a few other exercises while it's been hanging around the shop. Saw ran very well, performance expectations just reached and not exceeded. Goal here was a strong running work saw better than stock. Besides the replacement of all the lines filters boot drum and sprocket, carb and so on to get it back in shape, this is what I did. Saw came to me with light scoring on the exhaust side of piston. Cylinder was salvaged as transfer was light, cleaned up well with the Mastermind method. A Meteor piston w/caber rings was used, squish set at .023", ports were smoothed out, port matched and polished. Flywheel key reduced by .010" to advance timing just a tad bit. Muffler was port matched and a dual outlet cover installed. A HD2 air filter from HL supply with a Stihl outer cover was installed. Saw was tuned in the wood before limiter caps were re-installed.
    While I'm quite sure this would seem like a conservative approach by most folks here, and it is. Air easy in, air easy out, smooth travel along the way. Something can be said though, that this simplistic approach does have its rewards. No, it won't win cookie cutting races, but then it never will cut them either. Real race here is out in the woods, where I believe this saw will hold its own(at least in these woods, this ain't the PNW). Really does not matter what I think of it, only that the owner is a happy one, that will be the true measure of success.


    IMG_20161016_090004_118.jpg
     
  15. P.M.P.

    P.M.P. ...

    Joined:
    Dec 31, 2015
    Messages:
    5,607
    Likes Received:
    23,138
    Trophy Points:
    448
    Location:
    Michigan
    Nice bar. What does PNW stand for:confundio:
     
    cus_deluxe likes this.
  16. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality Staff Member

    Joined:
    Jun 5, 2016
    Messages:
    18,648
    Likes Received:
    109,194
    Trophy Points:
    763
    Location:
    Northwoods of Wisconsin
    Pacific North West, where they grow 'em big.
     
    Funky sawman, cus_deluxe and P.M.P. like this.
  17. jake wells

    jake wells no longer here

    Joined:
    Dec 28, 2015
    Messages:
    8,302
    Likes Received:
    19,424
    Trophy Points:
    426
    Location:
    ky
    solved a fuel leak on the echo 440evl today and cut up a tree replaced the fuel line, filter and tank grommet i got it mostly cut.
    till the chain came off,,,, the spur sprocket broke clean in half time to order a new spur or rim drive for it.
    the old spur says HERR on it never heard that name before.
     
    Stump Shot likes this.
  18. MustangMike

    MustangMike Mastermind Approved!

    Joined:
    Dec 30, 2015
    Messages:
    8,383
    Likes Received:
    24,849
    Trophy Points:
    513
    Location:
    Brewster, NY
    How did you set the squish?

    On 044 & 440s you can usually delete the base gasket and end up with about 20/1000 squish, and I usually take 20/1000 off the key, which is still conservative.

    Deleting the base gasket will: increase compression, reduce the squish, increase the effective length of both the compression and power stroke (the time the piston is above the exhaust port), and increase intake duration.

    Conversely, I have never done any port work on a saw.

    You can often get them to out perform stock 460s, but ported 460s are another story.
     
    P.M.P. likes this.
  19. Stump Shot

    Stump Shot Old *pretty boy dipstick of Quality Staff Member

    Joined:
    Jun 5, 2016
    Messages:
    18,648
    Likes Received:
    109,194
    Trophy Points:
    763
    Location:
    Northwoods of Wisconsin
    Did not set squish, more like checked it, with AM piston and AM gasket just how it turned out. Was too tight with no gasket, which is where I was originally going. New piston changed everything.
     
    MustangMike and P.M.P. like this.
  20. Czed

    Czed Mastermind Approved!

    Joined:
    Jan 17, 2016
    Messages:
    16,024
    Likes Received:
    88,038
    Trophy Points:
    590
    Location:
    Wv
    I rebuilt a 371 three years ago for a friend meteor and cabers ran excellent for two months and he admitted he leaned it out and smoked the topend even though i cleaned up the husky jug he wanted a bigbore so i got the cheapest chinese kit off ebay 21.00 i think and bought cabers it only had 145 compression new he says it has more power than original it doesn't i ran it both ways and can tell the difference but it's still holding up it surprised me.
     
    Stump Shot and MustangMike like this.
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