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There are none. You are not supposed to tune the poulan model 1975. It is locked from the factory. I have the same problem.
show diagram of poulan chain fuel lines
Make sure you have the lines wright the skiney line from in the tankgoes to the top nipple on the carb the over flow line goes to the long nipple on the primer bulb and the other line off the primer bulb goes to bottom nipple on carb
You have a kink in your fuel line or you have debris in the carburetor.
Start with 1 1/4" turn out on each of the H and L adjustment screws.
Unless you are a authorized service mechanic for the Poulan company, you will not be able to do your carburetor adjustment, because the carburetors are being manufactured with a cap on the adjuster screws and there is a special tool needed to do the adjustment, and only a ASM will have this tool . Although i have seen them being sold on other sites. but the reason for the manufacturing of the carburetor this way is from the EPA not wanting a Joe Sschmo adjusting it too high or too low and letting the harmful emissions effect the air.
Poulan and Poulan Pro make them
I'm having the same problem with my Poulan chainsaw and weed eater. I think the line starts with the fuel filter in the tank and travels up to the primer bulb, out of the bulb into the carburetor, and out of the carburetor back to the tank. Whatever the size of line is that hooks to the fuel filter is what will hook to the primer bulb and then the carburetor. Then one more single line returns to the tank. I may not be correct on this, but there's not much information available. The diagram on Poulan's website does not show the routing of the fuel lines. that is right but to remove the main line you need to drain fuel and pull the line out from the fuel tank neck first because it has a connection that will not fit threw the hole in top. to replace it cut new line at a slaint and fir it threw from the top down into the fuel tank. then keep it long and pull out enough threw the fuel cap to put fitting back on it and fuel filter then pull it back threw and hook it to primer bubble. Not sure about your answer I have two different size fuel lines on mine. The larger line if I remember correctly runs from primer bulb to the right of fuel tank where the larger opening is located. The smaller line is where I am confused at shouldn't the smaller line from the fuel tank that has in tank filter attached run up to carburetor. then a smaller line from primer bulb to second fitting on carb. byrumjr the line starts with the fuel filter in the tank and travels up to the carburetor out of the carburetor into the primer bulb, out of the primer bulb back in the tank
There are two lines inside the tank. The short line with no fuel filter on the end of it goes to the inlet, (suction) side of the primer bulb. The long line inside the tank, with the filter on the end goes directly to the fitting on the side of the carburetor. The line, inside the air box from the outlet side of the primer goes to the remaining fuel line fitting on the carburetor. http://store.chainsawr.com/
The small line from the tank (with the fuel filter) goes to the top port of the carburetor. The large line from the fuel tank goes to the center port of the primer bulb. The other port of the primer bulb goes to the bottom port of the carburetor.
Poulan has a diaphragm that goes bad in the carb. It's not expensive to fix it yourself if you do things like that. Take it in and it's $50.00. Plug foul out often too and simulate a fuel problem. Good luck!
Poulan