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Mccullough mac 4600 chainsaw gas line connections

Need help with connections between Bulb and carburetor and fuel tank and carburetor

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  • Dean Bowker
    Dean Bowker Feb 04, 2010

    I have two fule line connections on carburetor. On is on top (which is metal). One is on side (opposite side of where the set screws are located) and is plastic . Which connection do i use to connect fuel line from gas tank . I am assuming its the top connection but my new bulb is not pulling gas through the side connection . Thanks. Dean

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This is an example of a typical fuel system with a few suggestions:
http://www.fixya.com/support/r3706813-2_cycle_fuel_system_repair

Your basic model number is 600465. I only saw 11- prefixes used with 600465s, no promises I did not miss any. There are a few different suffixes with the 600465s. I think the suffix is on your saw immediately after the basic model number somewhere (On older Macs it is usually on the bottom along with the serial number. The dash of the serial is often the correct prefix). I must defer to you to find your exact IPL, here:
McCulloch IPLs
http://www.ordertree.com/modelinfo/McCulloch/139.59.htm


I chose "11-600465-09" as an IPL example:
http://www.ordertree.com/modelinfo/MCC/11-600465-09-MAC-4600-10%2F94-to-Current-IPL-211594/139.11-600465-09-MAC-4600-10%2F94-to-Current-IPL-211594.1.59.1.html

I find these helpful when getting into an area of repair I am unfamiliar with. Also all components are displayed and part numbers listed.

If you find different size hose a small sample of each taken to a local saw outlet should provide something suitable. Please ask how long they feel any replacement should be (usually 12" ample). HTH
Lou
If you have additional questions you can reply below and I will assist you further.

Posted on Feb 04, 2010

  • dontbother10
    dontbother10 Feb 04, 2010

    I honestly do not know Dean. Logic says the highest connection should be the bleeder (primer - air rises) But logic got me in trouble in the military. Leave the hoses long and try it. If it does not perform as you had hoped swap them and retry. The only way for to provide an informed answer is for me to have been where you are. I have not. From your description I think you have them reversed. Metal top connection to primer.

    Lou

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Diagram of fuel lines from tank to primer to carb and back to tank for a poulan 2050 chainsaw.


clip_image002.gifFuel components are onthe "Engine Assembly" & "Handle, Chassis, & BarAssembly" detail pages.
Replacement fuel lines can be found at yourlocal chainsaw seller/mechanic. They are different diameters.

Fuel Line Replacement
  • 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, the 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 the bulb as it inflates).
  • The pressure side of the primer returns displaced fuel to the tank as it is depressed.
2_3_2012_12_23_25_pm.gif

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No drawings or pix, but will try for description--the line from the tank that has the fuel filter is the main fuel source which goes to the upper connection on the carburetor. The lower carburetor connection goes to the intake side of the primer bulb, and the outlet side of the primer goes back into the tank, which has no filter inside the tank. The main problem is determining the correct primer port to connect back to the carburetor. When everything is connected, try priming the carburetor. If fuel fills the bulb, you have everything connected correctly. If nothing happens, try switching the two primer port connections and try to pump fuel again. If still nothing, hook the main supply line from the carburetor over to one of the primer ports and try for fuel again--if still nothing, switch the main supply line to the other primer port and pump again. If still nothing, check for a plugged fuel filter in the tank. If the filter was plugged, then go through the previous procedure again. Make sure to replace the fuel lines with original rubber lines, not plastic. Hope this helps!

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Need to peplace fuel line in gas tank.whats the easy way to do i


Watch the video, bar far the best method I have found.
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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Saw repair


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.
0b17a27.gif
HTH
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There are 4 different IPLs for this saw. Fuel detail are on multiple illustrations.
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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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, the output line from the carburetor connects to the suction side of the primer bulb (once bulb is collapsed it draws fuel from the tank through the carburetor to refill the bulb as the bulb refills).
  • The pressure side of the primer returns any excess fuel to the tank as it is depressed.
HTH
Lou

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What little fuel system detail there is can be found here:
IPL (Chinese Mac, exploded parts list)
https://www.dixiesales.com/ipl/327/Chainsaws_32cc-35cc.pdf


Fuel Line Replacement
SmallEng.com
http://www.youtube.com/watch?v=JrXpU70Hmi0
Routing runs from fuel tank to carburetor, (if equipped) through carburetor to primer bulb, bulb returns excess to fuel tank. HTH
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