Fuel line replacement can be tricky. I was able to locate a similar question that has directions that may help while you wait for the expert response. I attached the link below. I hope this is helpful.
I am sorry; we do not have written instructions for the routing of the fuel lines on your product. Our technicians are thought the basic routing because the routing cannot change much from year to year.
If you have one large fuel line and one smaller this eliminates some chance for error. If you have 2 small fuel lines to the carburetor connect them and start the engine. Reversing the fuel lines will not prevent the engine from starting. If you have them connected backwards, the engine will start and die. Reverse them and you will be correct.
The routing of the fuel lines vary from model to model. Keep in mind that the primer bulb circulates fuel from the tank, through the carburetor, and back into the fuel tank. One line goes from the fuel tank to the carburetor. One line goes from the fuel tank to the primer bulb, from the primer bulb to the carburetor, and back to the fuel tank. The small line in the fuel tank should have the filter attached to it. I have added a sketch below of how the fuel should flow in the circuit.
I hope this is helpful. Please reply below if you need further assistance.
If you do not feel confident repairing this problem yourself, then you can have it repaired by a Sears technician. Here is a link that will provide the nearest drop-off locations:
I have chainsaw model # 358.351800 - does the gas tank line (with the filter attached) go directly to the carb? There are two holes in the tank one lower and one higher - which line goes to each of these holes - a drawing of this layout for this chainsaw would be helpful.
I' like to assist you with your chainsaw fuel line routing. [ There is a video attached to this reply youtube.com/watch?v=uCC1qO75zDk&feature=relmfu that shows how to identify the fuel lines. It is of a different type of application, but most two stroke engines work on the same principal.
The primer pulls the fuel from the tank through the carburetor. If you have a larger diameter line, use it on the suction side with the filter that runs directly to the carburetor. The hole position is not critical, but I would use the bottom one for the suction / fuel supply side and the top for the return.
I would like to provide a detailed diagram for this model, but there is not one available. Please let me know if you would like any further assistance.