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Stihl fs80av I have an older tk carburetor model stihl made by shindaiwa fs80av weed trimmer. the carb has two feeds. how do these fuel lines get installed. one is obviously the fuel pump feed the other main fuel feed. However the fuel tank has a either a primer bulb and or its some kind of purge/check valve that has only one fuel line that goes into the tank. How are these line routed? Is there just a tee there? The flow of fuel is making no sense to me.

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  • 322 Answers

Generally you have 1 line from the tank that has a fuel filter attached to it that goes to the inlet port on the carb, 1 line from the carb to the primer bulb, and 1 line from the primer bulb back to the tank. when you press the primer it draws fuel through the carb and returns it to the tank through the primer bulb

Posted on Oct 17, 2013

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SOURCE: routing of fuel lines from tank to primer bulb to carb

Line with filter goes to carb inlet,
Line from carb goes to inlet side of bulb.
Line from bulb goes to tank

Posted on Mar 21, 2009

  • 4 Answers

SOURCE: Mcculloch 3216 starts few seconds and dies, choke must be closed.

after jerkin fingers bloody today same problem i took carb apart,,the old hoses deteorated an clogged screen on in take side/// inside of carb plate //of carb,,blew out with choke cleaner,, reassembled now runs well make sure to run same size hoses large an small,,as original other wise floods out,,,

Posted on Mar 21, 2009

dontbother10
  • 2220 Answers

SOURCE: 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.
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HTH
Lou

Posted on Dec 07, 2009

dontbother10
  • 2220 Answers

SOURCE: Primer bulb-carb routing

It should be like this.
http://www.fixya.com/support/r3706813-2_cycle_fuel_system_repair

If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH
Lou

Posted on Apr 10, 2010

197jacobs
  • 226 Answers

SOURCE: I have a 2250 Poulan. The fuel lines have been

Is there a fix for bar oil running out of the saw all the time until the tank is empty?


there is bad oil line repalce it.

Is this the correct routing for the fuel line? Starting at the filter in the tank,will the line go to the bottom of the carb.? Then the line goes out at the top of the carb. to the primer\'s suction side? Then out of the primer to the fuel tank? This route the primer pulls gas through the carb. Does it make any difference which hole in the tank the lines go to?

YES that correct

Posted on Dec 29, 2010

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