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Rick
Rick, Small Engine Technician
Category: Small Engine
Satisfied Customers: 3844
Experience:  Outdoor Power Equipment technical trainer since 1990, covering eight states.
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My stihl cutter ts350 wont pull fuel from the tank

Customer Question

My stihl cutter ts350 won't pull fuel from the tank
Submitted: 3 years ago.
Category: Small Engine
Expert:  Curtis B. replied 3 years ago.
With no primer, I assume your choke flap on the carburetor is closing the opening when choked? If the choke is working, and no fuel is being drawn from the tank, you can have a bad fuel line or split connection on the fuel hose to the carburetor from the tank. Also the filter in the tank has to be clean. I would replace the suction hose, the one with the strainer on it in the tank, and clean the strainer. I think this is where you have a problem. Might also be a good time to replace the return fuel line also.
Customer: replied 3 years ago.

The choke is working.The filter iin the tank is new.Which is the return fuel line?

Expert:  Curtis B. replied 3 years ago.
The one without the strainer, that just pokes through into the fuel tank. Carburetor should have two hoses, one is suction other is return.
Customer: replied 3 years ago.

The other line just looks like a breather,it has a threaded screw in with a groove down one side.

Expert:  Curtis B. replied 3 years ago.
It is not important, only the supply line would cause problem. Check the hose connection at the carburetor for any splits or hole in line. I would replace this line!
Customer: replied 3 years ago.

I will try this but if I suck on the end of the line Ido get fuel.

Expert:  Curtis B. replied 3 years ago.
It is either a bad line, or the carburetor still has problem. When you replaced the diaphragm, did you clean the small fine mesh screen in the carburetor inlet side?
Customer: replied 3 years ago.

The mesh was clean.


 

Expert:  Curtis B. replied 3 years ago.
OK, so that would indicate the fuel line is sucking air and not letting the carburetor suck fuel.
Customer: replied 3 years ago.

so what I need is new hose's

Expert:  Curtis B. replied 3 years ago.
That would be my starting point. And it likely will take care of the problem. I assume you have compression and the engine is capable of pulling a vacuum.
Customer: replied 3 years ago.

There is compression

Expert:  Curtis B. replied 3 years ago.
OK, then the fuel line would be the next step.