Question about McCulloch 16 Inch Gas Chain Saw MCC1635AK

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Just replaced fuel lines and primer bulb in my MAC 3516. I put the line coming from the fuel filter on the shortest port on the primer bulb and the line going to the carb on the longest port. Was this correct? The engine will start but will not keep running. Can this be caused by incorrect fuel mixture? Have tried the choke in all positionsl Arm's tired! Please help!

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Line from fuel filter goes directly into the inlet of the carburetor and the line from the snap in bulb that is marked "in" attaches to the other outlet connector on the carb. Last is the long side of the bulb goes to the return on the gas tank. The snap in bulb sucks the gas but not directly from the filter hose, it does this through the carb as if it were trying to not only **** in the fuel but also removing the air trapped in the carb. You'll notice that the bulb has a **** side and a discharge side, and the **** side goes directly to the carb outlet connector. I tried to make this a clear as possible, and I hope it helps.

Posted on Oct 17, 2010

  • cnaray Oct 17, 2010

    I guess they will not allow the word SUC*. The * is a K. Sorry for using a proper word. S. or U. or C. or K.

  • cnaray Nov 30, 2013

    Maybe I should of used draws no suc*s

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Two lines come from the tank--one with a filter that goes to the carburetor, another with no filter which goes to the output side of the primer bulb and passes pumped fuel back to the tank. Connect only the line with the filter on the end to the primer and pump it. If nothing happens, switch the line to the other port on the bulb and pump again. With fuel mix in the tank, one of these two ports should pull fuel into the bulb. When correct, put the filter-less line on the other port of the bulb. Remove the filtered line from the bulb and hook it to the upper fuel connection on the carburetor. Use another length of fuel line to connect the now open port of the bulb to the other port on the carburetor. If the connections on the carburetor are correct, fuel will fill the bulb after a few pumps. If nothing happens, reverse the two connections at the carburetor and try to pump again. You should see fuel enter the bulb with only the correct connections at the carburetor. Usually, these connections are unidentified and must be found by trial and error. This is also a good reason for replacing only one line at a time! When fuel pumps into the bulb, attempt to start--with luck, the engine will run. Once the engine runs normally, trim the line lengths so that you have no excess line, but don't have sharp bends in any line either--they will eventually kink! Hope this helps!

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1 Answer

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http://www.ordertree.com/modelinfo/MCC/22-600035-18-Mac-3516-IPL-211318-01/139.22-600035-18-Mac-3516-IPL-211318-01.1.59.1.html
A helpful video, a few of my suggestions, and a schematic follow:
Fuel Line Replacement by SmallEng.com
http://www.youtube.com/watch?v=JrXpU70Hmi0
  • The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
  • If the saw is equipped with a primer bulb, an output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
  • The pressure side of the primer returns displaced fuel to the tank as it is depressed.
Take lots of notes and a few digital photographs to help with reassembly.

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HTH
Lou

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What you request doesn't exist. Fuel system components, part numbers and some detail can be found here:
McCulloch IPLs
http://www.ordertree.com/modelinfo/MCC/11-600035-34-Mac-3516-IPL-211318-01/139.11-600035-34-Mac-3516-IPL-211318-01.1.59.1.html
View all the pages and read the parts lists. Then use the following as a guide. Be warned! most saw shops will not repair these saws.
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Fuel Line Replacement by SmallEng.com
http://www.youtube.com/watch?v=JrXpU70Hmi0
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  • The pressure side of the primer returns displaced fuel to the tank as it is depressed.
Take lots of notes and a few digital photographs to help with reassembly. HTH
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