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A 4-cycle straight shaft string trimmer manufactured by Troy-Bilt. This model is identified by TB675 EC.

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Routing Fuel lines on weedeater

How do you route fuel lines on a troy-bilt jump start 4 stroke with primer on the cover.

How does it go from the primer, to the tank, to the carb?

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I have the same problem and repair places don't want to tell you anything. They want to charge you to fix it and its not worth that much. I can buy a new one. Watching this for the cure

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No one has answer My question about the second outlet

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Is there a video for model tb675ec showing how to change primer and fuel lines. The tb675ec has two outlets in the primer one goes to gas tank where does the second one go?

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I did a video on it on youtube with a diagram from Troybilt.

https://www.youtube.com/watch?v=jT6acdJ6...

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The video was for a primer with the three outlets. The primer on my Weedeater has two outlets model tb675ec

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Primer has two outlets one goes to gas tank where does the other

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If you only have 2 lines from the primer bulb 1 has to go to tank an 1 goes to carb.l have 3 on mine 1 to carb drain and 2 to stick inside tank

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With all 2 port primer (purge) bulbs the longer port is ALWAYS the output and should return to the tank. This is the line that pressurizes the tank to force fuel through the filter and up to the carb.

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Fuel Line Routing - Hand Held

Fuel Line Routing - Hand Held

Sep 21, 2017•FAQ

Article Number

000002446

Problem

How are the three fuel line on the hand held engines attached?

Solution

The 3 fuel lines should be connected as follows:

  1. The (clear) main fuel line with the filter (filter inside the fuel tank) goes to the bottom of the carburetor (or the elbow shaped nipple).
  2. The (clear) fuel intake line runs from the top of the carburetor (straight nipple) and goes to the short post on the back of the primer bulb.
  3. The return line (blue) comes from the long post on the back of the primer bulb and goes into the bottom of the fuel tank.

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Well if that's the way the 3 lines hook up that leaves one outlet on primer and one on carb.whar hooks to them it's a tb685ec l have straight shaft that someone gave me.do they have the wrong primer bulb on it.could someone explain this one for me.thanks

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Please read through new comments as I only just now addressed this issue. ANY time you come across a machine that has a 3 port primer, it never has a choke! The additional port is to inject a small portion of fuel directly into the carb. All these bulbs have a single intake and 2 output ports.

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I've seen many folks with questions regarding the correct routing of fuel lines on machines that use a 3 port primer (purge) bulb. My answer is rather lengthy so if I can help please email me at walthoddinott@yahoo.com. I'm an old hand at small engines. Prior to Covid I had my own small engine repair business. I've got just over 45 years doing this! I will prepare a response with diagrams and photos to get you through this. Thanks all and be safe!

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Bob wird auf ewig dankbar sein.
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