Stihl MS 192T Top Handle Saw

[Wood Doctor]

Have you tried removing the fuel line and blowing it out with compressed air? My one had a little debris in it that caused the primer bulb to not receive fuel, just as you state. Don't blow debris back into the tank!!!! Remove the fuel line from the tank if you can, just a rubber grommet and blow from the primer bulb holes towards the other end. Make sure all other ends of the line are disconnected if you can.

I will try that again. I did exactly that for the 192t and it worked for awhile. I may not have got all of it out or more grime arrived somehow. I'll also remove the carb and give it a good overnight fuel soak.

I think both the pipe #7 and the fuel hose #4 are both potential culprits. I'll also remove the handle housing to make it easier to operate on them. The hardest line to remove and reinstall is the tank intake #2.

 

[singinwoodwackr]

I will try that again. I did exactly that for the 192t and it worked for awhile. I may not have got all of it out or more grime arrived somehow. I'll also remove the carb and give it a good overnight fuel soak.
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I think both the pipe #7 and the fuel hose #4 are both potential culprits. I'll also remove the handle housing to make it easier to operate on them. The hardest line to remove and reinstall is the tank intake #2.

Check the tank vent and line as well

 

[Wood Doctor]

Check the tank vent and line as well.

I've done all that as well. including the line elbows. I even removed the carb and connected up dummy Tygon fuel lines to it along with part #6, all connected to a jar of fuel. It pumps fine then and fills the primer bulb, all the lines, and pulls fuel through the carb. But, when I reinstall part #6 and Stihl's checked-over lines, no fuel makes it to the bulb from the tank and the saw is a dead puppy. All three of these Stihl top handle saws do the same thing. I have never had this happen with either Echo or Husqvarna.

I have considered replacing all of these checked-over Stihl fuel lines with Tygon tubing and part #6 and see if I get the same result. Sounds goofy, but nothing else is working.

Maybe the Bermuda triangle was blown 2000 miles northwest to Nebraska.