Question about McCulloch 16 In 4.5 Hp Electric Chainsaw With Carrying Case MCC4516FK

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39cc McCulloch chain saw

The saw has no power. I mixed new gas at 32:1 gas/oil mix and still can not get the saw to run right. If I feather the choke when it bogs down, it will keep running. It barely idles. If it is idling, and I hit the throttle it will bog out and I have to try to restart it again.

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  • mrgoodwrench Oct 04, 2008

    I would love to see the carb adjustment instructions for this saw. It is a McCulloch MS1839AV. This would be of EXCELLENT assistance. Is the gas/oil mix correct at 32:1? Thanks

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I have the same exact saw as you and I was having the same troubles except I had to keep pumping the primer bulb to keep it running. I didn't want to go by a new saw because I knew I could fix it, as I am skilled in small engines, but have never actually taken a chainsaw apart. I dug into it and found that the fuel line that comes out of the side of the carburater and leads into the fuel tank with the fuel finlter on the end looked cracked a little. So i trimmed the end of it off and thought that it would work. It didn't! So I took it back apart (took the carb all the way out) and found that that fuel line was totally rotted underneath the carb and every time I pressed the primer bulb, fuel shot out of a large crack where the fuel line was bent. After I replaced that everything was running great. If you have any more problems, feel free to contact me. John

Posted on Mar 07, 2009

  • Mark
    Mark May 01, 2014

    I have a 39cc McCulloch chainsaw too and I have the same problems John describes. I have to keep pumping the primer bulb to keep it running. The fuel line looks fine. How can I test it? Can the carburetor be the problem? I adjusted the low an high speed fuel adjustment screws at the middle. Please help me with my problem Thank you

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The issue sounds just like a carburetor problem. I had a saw that did the same exact thing, and found that I hadn't been adjusting the carburetor properly for years. I managed to find the instructions on-line, and then it ran like a dream, just every time I store it, I have to go back through the motions again.

Let me know if you need adjustment guidance and I will see if I can dig up anything.

Posted on Oct 04, 2008

  • J. May Oct 04, 2008

    I am sorry that I cannot be of better help. I could not find the exact manual, but here is a link to another owners manual that describes how to adjust the carb. on a different McCulloch chain saw.



    McCulloch
    -Manual">http://www.scribd.com/doc/3097717/CHAINS...McCulloch-Manual



    Generally, the gas/oil mixture would depend on the saw. I have seen up to 50:1 mixes. I know that if you have oil seepage through the muffler than the mixture is a little too oil lean (it is usually brown or green and it is the oil burning off). Actually 32:1 sounds about right. A friend of mine who owns a small engine shop told me that you always use good quality, high octane gas, a good mix, run a 2-cycle engine hard (no partial throttle squeezes), and never use mix that has sat up for a few months.



    Here is a local small engine shop in my area. The owner's name is Gary. He is very honest and knowledgeable. If you need further help, I am sure he can better direct you. His number is 501-771-6885 -Manual">http://www.scribd.com/doc/3097717/CHAINSAW-McCulloch-Manual

    Generally, the gas/oil mixture would depend on the saw. I have seen up to 50:1 mixes. I know that if you have oil seepage through the muffler than the mixture is a little too oil lean (it is usually brown or green and it is the oil burning off). Actually 32:1 sounds about right. A friend of mine who owns a small engine shop told me that you always use good quality, high octane gas, a good mix, run a 2-cycle engine hard (no partial throttle squeezes), and never use mix that has sat up for a few months.

    Here is a local small engine shop in my area. The owner's name is Gary. He is very honest and knowledgeable. If you need further help, I am sure he can better direct you. His number is 501-771-6885

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I am installing a new primer bulb and find I have 3 hoses 1 from the bulb to the carburator and one to the fuel tank . The third hose comes fron the fuel tank , where does that one go ?

Posted on Aug 25, 2009

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