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

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How to change spark plug on McCullough eager ****** 16 chainsaw

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  • bjnliles Jul 04, 2009

    Thanks for your help, but I did not ask the right question. I had never worked on a MCCullough chain saw before, only lawnmowers, etc. and electric chain saws. This chainsaw was given to me as a challange to get it running.
    My problem really was: how do you get to to the spark plug to examine it and then check to see if it is getting spark from the magneto.
    I didn't realize you had to remove the chain and bar cover to get access to the spark plug. This is not easy to reassemble either.

  • Anonymous Mar 15, 2014

    Cannot reassemble choke assembly on McCullough eager ******


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The hardest problem is pulling the wire boot off of the plug--I use a screwdriver to lift up on the boot while pulling on the upper boot with your fingers and twisting the boot side to side. Once the boot is off, use the proper size deep-wall socket wrench to remove the plug (turn counter-clockwise). Make sure the base of the plug near the cylinder head is free of dirt. The plug is a tapered-seat type and is prone to being hard to turn at first. If the internal insulator is a shade of brown, it is probably ok. If it is oily black, then you are probably putting too much oil into the fuel mix, or using automotive oil. Check the spark by installing a new plug into the boot and run the starter a few times. There should be a blue spark occur each revolution (the plug base must touch the cylinder head!).

Posted on Jul 03, 2009

  • drallim Sep 11, 2009

    I was reviewing some former answers to problems and read your response. By now you have realized that the spark plug is not under the chain drive cover, but is at the rear of the saw--the point nearest you when holding it to saw wood. See the previous entry for procedure to remove and check the plug. Make sure the ignition switch is in the upper position to get spark. If you get spark, try squirting a little starting fluid into the plug hole, reinstall the plug, and pull the starter cord through a few times. If it runs for a second or two, turn the choke lever toward the side and pull the starter a number of times until it pops, then turn the choke about halfway back, and pull some more. If it won't do anything, then there is no fuel getting to the engine. Make sure that there is fresh fuel/oil (40 to 1) mix in the fuel tank. Both case halves must be removed to gain access to the carburetor and fuel tank if you plan to get into the carburetor.


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