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036 fuel problems

Discussion in 'Chainsaw' started by C Elliott 77, Feb 11, 2019.

  1. C Elliott 77

    C Elliott 77 ArboristSite Lurker

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    I have an 036 still that is a tough one to start. It will flood very easily. I’ve checked it over pretty good but today when I had the air filter off and had it running in the shop it was blowing a fair amount of mist of gas back out of the carb on my hand. I pulled my filter off of my 046 and it wasn’t blowing anything out. Where should I go from here?
     
  2. cuinrearview

    cuinrearview Red saw lover

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    I've had the same problem. It's most likely a bad carb. I had one with leaky welch plug that did that. The intake side of the piston could be worn and blowing back but if it's all original I'd start with the carb.

    If everything else is right your choke might not be closing all the way. Check the selector switch spring.
     
  3. C Elliott 77

    C Elliott 77 ArboristSite Lurker

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    It’s a relatively new carb so I’m hoping it’s not the problem. The choke looks wide open. I pulled the muffler and it’s not stopped up.
     
  4. albert

    albert Addicted to ArboristSite

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    The spark screen clean, export on cylinder not carboned up? Could be worn piston skirt also. Some spit back is normal. Certain models have more.
     
  5. cuinrearview

    cuinrearview Red saw lover

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    I just realized how sporadic my post was. The hard start could be problems in the cylinder or carb but the selector spring not closing the choke is common with that model. Low compression could also cause hard start.

    I guess more info is needed. What's the compression reading? What is the history of the saw?
     
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  6. cuinrearview

    cuinrearview Red saw lover

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    I think @HarleyT could get to the bottom of it. Prepare to answer rapid fire questions...
     
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  7. C Elliott 77

    C Elliott 77 ArboristSite Lurker

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    I bought it from a former member here. Supposed to be new top end on it. Haven’t checked compression but it still feels stout. It has been a bear to start because if it don’t hit on the first couple pulls it’s flooded. The muffler is clear I just had it off because I was thinking the same thing.
     
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  8. cuinrearview

    cuinrearview Red saw lover

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    If you try it without choke how does it start cold? I've rebuilt a couple three series Husky Walbro carbs that were peaches to start.
     
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  9. C Elliott 77

    C Elliott 77 ArboristSite Lurker

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    I usually choke it. If you set it down hot it will flood a lot of times
     
  10. cuinrearview

    cuinrearview Red saw lover

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    Sounds like carb or tank vent.
     
  11. HarleyT

    HarleyT Tree Freak

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    Sounds like an old woman....
     
  12. HarleyT

    HarleyT Tree Freak

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    Take the carb apart. Why ask anything before going into the carb?
    While the carb is off, take a peek at the piston from that side!!!
     
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  13. cuinrearview

    cuinrearview Red saw lover

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    Where the hell you been hangin' out?
     
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  14. pioneerguy600

    pioneerguy600 Lost in Space Staff Member

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    But, but its a nearly new carb!
     
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  15. HarleyT

    HarleyT Tree Freak

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    Zamas are bad about welch plugs losing their grip, but with junk Chinese carbs, who could say??
     
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  16. HarleyT

    HarleyT Tree Freak

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    Also looking at the piston from that side, not a bad thing!!!
     
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  17. C Elliott 77

    C Elliott 77 ArboristSite Lurker

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    It’s a new zama carb from stihl. I didn’t look at the intake side of the piston but the exhaust side looks fine.
     
  18. HarleyT

    HarleyT Tree Freak

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    Take a look.
     
  19. C Elliott 77

    C Elliott 77 ArboristSite Lurker

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    I will tomorrow. Thanks for the advice.
     
  20. farmer steve

    farmer steve outstanding in my field, 5150

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    i bought an 036 from a couple moving to florida. when i went to look at it the lady told me they had it to the shop because it always flooded when the husband tried to start it. shop could never find the problem. the saw had old gas in it when i got there but i thought i'll give it a pull or 2. the saw popped on the 2 nd pull and when i flipped the lever up to choke it started on the next pull. the lady's jaw dropped and said her husband would pull and pull and couldn't get it started.
     
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