Question about Poulan Pro 42CC 2 Cycle Chainsaw, 18"

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Have replaced fuel lines but still will not keep running how do the fuel lines hook up and any other advice

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There are three hoses on the machine, the hose from the tank with the filter on the end, connects to the fuel inlet on the carb, this is the inlet closest to the pump side of the carb held with a single screw, there is then a hose nearest to the metering dide of the carb, this goes to the short conection on the back of the primer, the suction side, the long connection on the back of the primer, the pressure side returns to the fuel tank, just remember the primer pulls fuel from the carb, and back into the tank, not the other way round, if you have connected them the wrong way, this will explain why it runs badly.

Posted on Mar 19, 2011

Testimonial: "thank you it sounda like the problem we could not find a diagram for the hoses "


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This is a carb flooding issue, there will be a rubber tipped needle in the carb, if this is not seating properly fuel will leak through the air filter, you need to go into the carb, check the metering lever height and replace the needle, unfortunatly it is not possible to replace the needle seat so if it continues to leak after fitting a new needle it will be a replacment carb.

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Replace the fuel line from tank to bulb and from bulb to engine. The old type lined tube gets damaged by the ethanol content in pump fuel. Buy non ethanol fuel if you can. The lining come away from the walls of the tube and blocks the flow. You can force it with the bulb, but the fuel pump is not strong enough to open up the lining. Your problem is becoming a common occurrence. The worst stuff is the grey tube apparently.

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The longest, and sometimes smaller in diameter of the two fuel lines, goes from the carburetor to the bottom of the tank. Leave enough slack in this line so that the filter that attaches to the end will rest comfortably at the bottom of the tank.

The other fuel line goes from the primer bulb to just inside the tank, (about an inch). make sure that you get the right size fuel lines. The plastic coupling goes on the end of this line, inside the tank. This keeps the line from pulling out of the tank.

(HINT): When feeding the lines through the tank holes, cut the lines at an angle. They will feed much easier into the holes. You can than cut them off square, once you know that you have enough to work with

Let me know if you need further assistance.


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