25cc Gas Line Trimmer

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One is a fuel to the carburetor line and the other line is the return line to the fuel tank

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If the carburetor is new or has been rebuilt, you should set it to “factory” adjustment. You can do so by adjusting the idle mixture screws to 1.5-2 turns out, and the idle speed screw to 1-1.5 turns in. Warm the Engine Up. The engine`s running temperature directly correlates with proper air and fuel mixtures.
Turn the high speed or main jet screw clockwise until the engine begins to slow. Then, turn the screw the other way until the engine begins to slow. Turn the screw back to the midpoint. Once adjusted, check engine acceleration by moving the throttle from idle to fast.

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I need to replace to fuel lines on a Craftman 32cc trimmer. The old ones cracked apart. 2 of the lines look like 1/8″ OD one line looks like 3/32″ OD. Larger line looks like it hooks to filter, Smaller line to a fitting in the gas tank. I am assuming the smaller line ges to the primer inlet. My question is the lines penetrate the bottom of the gas tank. How do they seal. How do I install the filter and the fitting. I am assuming to thread the new lines in from the bottom of the tank and pull through the gas cap hole. Then I attach filter or fitting and pull back through. So do I pull the line so as to create a seal from the swell caused by the fitting/filter?
ANSWER : Depending on the brand of line you use, Tygon line is self sealing but seems to shrink faster then factory supplied because of the ethanol in the gas. The stone gas filter is designed to fall to the lowest part of the tank, not stop the line from falling out.

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I have a husqvarna 323L string trimmer. I stored it after running the tank & carb dry for about two years. I fueled it, then started it, & it ran for a minute then died like I turned the switch off. Since it would not restart, I found the fuel filter had broken off the hardened fuel line & it sucked gummy crap out of the tank & into the carb. Failing at cleaning the carb, I finally put a new carb on it & replaced the pump, hoses & filter. It has ran good till this year. I winterized it with stabilizer & left it with a full tank over the winter. The gas in the tank was gone when I got ready to use it this year. I filled the tank with premix, checked for leaks, then started it. It would run fine for about half a tank, start idling poorly (lean) then cutoff & refuse to restart till I refilled the tank. I finally found the tank had cracks & was letting pressure out of the tank & apparently this was causing the carb to lose it’s ability to siphon gas out of the tank. So I replaced the tank which came with new hoses & a filter, which I properly installed to the carb. It cranked right up, but when it runs a half tank, the carb quits sucking gas out of the tank. When I pump to prime the carb, it moves the fuel into the carb, but the pump never gets hard like it does when I prime the carb when the motor is cold. I have to keep refilling the tank, prime, & then it starts & runs until the tank gets about half empty. The new fuel filter is down in the gas tank properly, but It will not run after it shuts off until I refill the tank & prime. I’m baffled. New tank, new hoses, new filter, new carb, & I can find no leaks in the fuel system. It runs strong. The 323L is a two-stroke & it always cranks on the second pull from cold on a full tank. Any ideas?
ANSWER :

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Can not get spool head apart to change line, tried pump pliers, pipe wrench, won’t unscrew!!
ANSWER : If you are sure that it screws on it may be a reverse threaded unit..

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Gas leaking out of center hole on gas cap sears weed trimmer 358795150
ANSWER : I had same problem and got a replacement cap at a small engine shop. Seems there is a baffle in the cap to allow the tank to vent and to close off to prevent fuel leaking. Appears rubber baffle deteriorates over time.

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The machine starts when the primer is full. As soon as the primer has emptied the machine stops.It seems as though no fuel is getting to the carburettor.
ANSWER : That is indeed the case, fuel is not getting to or through the carburetor. Check the fuel line, including the filter in the tank. Then check the carburetor, clean it if necessary, replace the diaphram in the carburetor. The diaphram is also the fuel pump of the carburetor. Be very careful with the small parts including the little spring in the lower end.

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Gas line on line trimmer is broken, have replacement but there are two lines, cannot figure out where they hook up
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Need to change gas line tube – Craftsman Convertible 25cc. Gas Line Trimmer
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Llllon myweed trimmer there two lines thatcome from the gas tank to the carb.one looks like a pump the other lines looks parts came off
ANSWER : One is a fuel to the carburetor line and the other line is the return line to the fuel tank

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