ArboristSite.com Sponsors
 
 


562xp Hot start?

Discussion in 'Chainsaw' started by Andyshine77, Jun 24, 2016.

  1. CoreyB

    CoreyB Addicted to ArboristSite

    Joined:
    Aug 24, 2015
    Messages:
    1,540
    Likes Received:
    2,243
    Location:
    Usa
    That would be a relief if it is an easy fix.
    I am very interested in you video. I subscribe to your youtube channel.
     
    Andyshine77 likes this.
  2. MontanaResident

    MontanaResident Addicted to ArboristSite

    Joined:
    Apr 28, 2014
    Messages:
    2,986
    Likes Received:
    3,219
    Location:
    N. W. Montana
    My Stihl 290 has this problem and in cool temps too. Fast idle helps. I've also recently tuned up the low speed jet and upped the idle a bit, but have not tested it.
     
  3. albert

    albert Addicted to ArboristSite

    Joined:
    Feb 7, 2008
    Messages:
    1,502
    Likes Received:
    352
    Location:
    s.e pa.
    More than once, while cutting on hot days the only saws that would not start hot were two 562's and a partner 5000+. 026, 028s, 036 ms460, husqvarna 346, 268, 262 371 no trouble same fuel, run just as hard. Fuel boiling in the metal fuel tank that is part of the crankcase on the 5000+. The 562's primers were dry and did not work, the carbs were dry and noticeably very hot.
     
    Andyshine77 and Termite like this.
  4. mountainlake

    mountainlake Addicted to ArboristSite

    Joined:
    Oct 22, 2006
    Messages:
    4,612
    Likes Received:
    1,434
    Location:
    minnesota

    Try opening up the high about 1/4 turn, if no help put it back. Steve
     
  5. CoreyB

    CoreyB Addicted to ArboristSite

    Joined:
    Aug 24, 2015
    Messages:
    1,540
    Likes Received:
    2,243
    Location:
    Usa
    I have just spent the last two hours sweating my but off. (It needs it) trying to get the 6100 to vapor lock. I will upload a video with the results. Granted I couldn't use the same fuel the temp and humidity are not exact but I still gave it a valiant effort.
     
    Andyshine77 likes this.
  6. Termite

    Termite Time To Launch

    Joined:
    May 11, 2008
    Messages:
    1,712
    Likes Received:
    1,138
    Location:
    milltown indiana
    :clap: But I sure as hell ain't going to do that.
     
    CoreyB likes this.
  7. Chris-PA

    Chris-PA Where the Wild Things Are

    Joined:
    Jul 9, 2011
    Messages:
    10,021
    Likes Received:
    8,522
    Location:
    PA
    Meh, I've been doing other projects so I haven't been able to run a saw for a bit, otherwise I would have been cutting today. I would have run the last Poulan I put together specifically with this problem in mind just to see how it worked. I also had a spare old top cover that I added some ventilation to, although that will cause the filter to clog faster. Still, there's not much need for a filter if it won't start!
     
    Andyshine77 likes this.
  8. porsche965

    porsche965 Addicted to ArboristSite

    Joined:
    Oct 3, 2008
    Messages:
    1,987
    Likes Received:
    2,027
    Location:
    N.E. Ohio
    I won't be aggravated anymore with Husky and hot temps. They are great under 80 or so. Still own them and enjoy running Husky but use alternatives when it gets hot.
     
    J.Walker likes this.
  9. Chris-PA

    Chris-PA Where the Wild Things Are

    Joined:
    Jul 9, 2011
    Messages:
    10,021
    Likes Received:
    8,522
    Location:
    PA
    Clearly the 562 has an issue, but I'm still curious about why. The AT system gets blamed, but that seems to be a gut reaction without much evidence. How are other AT/MT saws working in the heat? The 562 is certainly not the only feedback carb saw.
     
    7sleeper, svk and Andyshine77 like this.
  10. angelo c

    angelo c Chooch

    Joined:
    Dec 3, 2008
    Messages:
    5,299
    Likes Received:
    3,705
    Location:
    Peoples Republic of North Jersey
    what happens if you purge the fuel through as its idling? will the cooler fuel in the tank cool the lines near the hot spots enough ?
     
  11. Andyshine77

    Andyshine77 Addicted to ArboristSite

    Joined:
    Jan 25, 2004
    Messages:
    9,968
    Likes Received:
    7,289
    Location:
    Cincinnati, OH
    The Echo started with one pull in the video. To be fair, later on I repeated the test and the saw took 5 pulls and the use of the choke to fire up, and the saw would not accelerate until it idled for about 20 seconds, after that the saw ran just fine. So the heat is having some effect on the Echo, but nothing like the 562, which was useless until it cooled down. Again the fuel is fresh 91 octane E-free.

     
    blsnelling and Thornton like this.
  12. 009L

    009L ArboristSite Operative

    Joined:
    Jun 11, 2016
    Messages:
    136
    Likes Received:
    143
    Location:
    No. Ca.
    Tag

    Edit: I truly hope you guys find a way to figure this out. Honestly, in 2016...Still having this problem is a f...ing joke. For those in and around my age group who owned dirt bikes as kids, you're very familiar with hard to start 2 stoke engines. It was without a doubt the BANE of our childhood. Lol!

    Any new anything that you have to speak softly too, rub just right, and say 3 hail Mary's just to start no longer has any place in my life. Sell that turd and save yourself the endless frustration of having to remember to make sure the Moon and Sun are at just the right angle before using.

    -Pat
     
  13. Andyshine77

    Andyshine77 Addicted to ArboristSite

    Joined:
    Jan 25, 2004
    Messages:
    9,968
    Likes Received:
    7,289
    Location:
    Cincinnati, OH
    I can tell you the Echo ran much cooler, you could touch the mag case for as long as you wanted, the 562 was vert hot. I need to get an IR Thermometer!
     
    Kaimi and GrassGuerilla like this.
  14. CoreyB

    CoreyB Addicted to ArboristSite

    Joined:
    Aug 24, 2015
    Messages:
    1,540
    Likes Received:
    2,243
    Location:
    Usa
    Video finally uploaded. It was hat and sticky. But hey I got to run my saws.
     
  15. Andyshine77

    Andyshine77 Addicted to ArboristSite

    Joined:
    Jan 25, 2004
    Messages:
    9,968
    Likes Received:
    7,289
    Location:
    Cincinnati, OH
    Haha love it!!

    The saw did sound a little lean on the restart, similar to the echo on the second go around.
     
    CoreyB likes this.
  16. Chris-PA

    Chris-PA Where the Wild Things Are

    Joined:
    Jul 9, 2011
    Messages:
    10,021
    Likes Received:
    8,522
    Location:
    PA
    When you release the bulb it sucks fuel out of the carb fuel well, which disturbs the pressure there and can stall it at idle.
     
  17. Chris-PA

    Chris-PA Where the Wild Things Are

    Joined:
    Jul 9, 2011
    Messages:
    10,021
    Likes Received:
    8,522
    Location:
    PA
    Sounds like it was getting very close to vapor lock. Keep in mind that state change is not a linear process, it's a threshold effect. Once you get to boiling it's all over, but just below that it can be fine.

    OK, but that is exterior surfaces. The heat source is inside (cylinder, muffler). One could make the argument that if the saw is hotter outside it's doing a better job moving heat from inside to out. You would indeed need a temperature measurement of the carb to be sure. I think the evidence is that it's probably hotter inside, but it may not be as extreme as it seems from touching the case.

    **************

    I wonder if the strato air inlet acts as a heat duct to bring cylinder heat to the carb area? With a non-strato the carb is connected to the case, which will be cooler and have fuel. The air inlets for a strato connect to the hot cylinder to the air valve, although that is supposed to be closed. I have not noticed that my GZ4000's are any more or less prone to vapor lock, but it is a different design where the air valve is bakelite and part of the carb mount.
     
    Andyshine77 and porsche965 like this.
  18. Andyshine77

    Andyshine77 Addicted to ArboristSite

    Joined:
    Jan 25, 2004
    Messages:
    9,968
    Likes Received:
    7,289
    Location:
    Cincinnati, OH
    Yep.
     
  19. Thornton

    Thornton 40:1 wide open like a chicken on a chain

    Joined:
    May 24, 2014
    Messages:
    1,326
    Likes Received:
    1,507
    Location:
    Buffalo Gap Texas
    Hope you get it figured out such a awesome saw. We use saws quite a bit for misc. trimming and clearing during the summer around here and it rarely gets under 90 during the day.
     
    Andyshine77 likes this.
  20. Cycledude

    Cycledude ArboristSite Operative

    Joined:
    Nov 24, 2015
    Messages:
    336
    Likes Received:
    246
    Location:
    Rib lake wi
    My 16 month old 562 has done that a bunch of times and I wish I knew a good way to fix it. Husqvarna put a new carb on it under warranty and the saw definitely has more power with the new carb and starts a little better when hot . I have kinda learned not to get the saw so hot or avoid shutting it off if it's real hot, do some lighter cutting for a few minutes before shutting it off seems to help. Like someone else said I think the EPA and lean auto tune are a big part of the issue, as long as I don't shut the saw off extra hot everything is fine, other than the hard hot start issue when the saw is extra hot I love the 562.
     
    Kaimi and Andyshine77 like this.

Share This Page