This is an ongoing issue for users, and rightfully so .On your machine.. Small diameter line out of fuel tank (has filter in-tank on end) connects to the side of the carburetor that has the fuel pump....that is the cover without the hole in it. Other larger diameter fuel line out of tank connects to the longer nipple on the external purge/primer bulb. The bulb "pulls" fresh fuel from the fuel tank to the carb and then out of the carb to itself, where it then pushes any air/old fuel back into the fuel tank. The remaining larger diameter fuel line in this setup goes from the metering chamber (has cover with writing on it and a vent-hole) side of the carburetor to the smaller nipple on the purge/primer bulb. Years ago on 2-stroke trimmers, primers were not even used,...you choked the carb with a slide lever and gravity let fuel enter the carb from above...a few pulls, a "pop"...slide it off of choke and away you went.
If the purge/primer bulb is on top of the carb...small line from carb body to small hole in tank with filter. Larger diameter line goes from the bulb on the fuel pump side of the carb to the larger hole in the fuel tank where the line is held in place with a nylon nipple connector that keeps the line from pulling out of the tank.
this sounds bakwards i thought the pump had a vent hole
Under the cover with 4 screws and a vent hole is the metering diaphragm. When it flexes, it pushes down on the end of the metering lever and opens the needle valve allowing the fuel to come in from the other side of the carburetor. A chamber (cavity) there acts as a reservoir holding the fuel until it is needed in the idle circuit or the high speed circuit or both. The other side of the carburetor is where the fuel from the tank enters first. It is "pumped" thru a small inlet screen and tunnel to the needle valve area when the carb receives the "pulse" signal from a vacuum created by the engine turning over. The flaps in the pump diaghragm on this side of the carb help to "push" the fuel to the metering side. If you open a diaghragm carb up you will surely see it. There are teflon pumps and buna pumps and mylar pumps. Tan, black and clear are their respective colors. Some people do call the metering diaghragm the pump but it actually is not....it's the colored diaghragm on the other side of the carb that does any pumping action. The information I've given you is correct as I own the same machine and have worked on it. Please look at this Zama tech guide: http://www.zamacarb.com/pdfs/TechGuide_2...
just worked on the neighbours unit....got it with melted lines and no idea how they should go back. Followed these instructions and it worked the first attempt.....thanks
I am happy to have helped any of you guys with this problem. You are quite welcome.
yayaaa! its a runnin now, thanks you made me feel like a pro!
×
SOURCE: repairing fuel line on craftsman 32cc weed trimmer.
Cut the end of the line at a sharp angle. Spray WD-40 on the line and fuel tank hole. Slowly screw the line in the tank far enough so you can connect the fuel filter if you are replacing that line. If not just push the line into the tank if you have a two line system. Remember on the fuel primer, the long tip has the line going to the tank, and the short tip has the fuel line going to the carb.
SOURCE: have craftsman 32cc gas line trimmer it runs until given gas
Replace the spark plug, clean the air filter and fill the tank with new fuel at the correct fuel oil ratio. Had the same problem last year. Tried to cheat with year old gas.
SOURCE: got a craftsman convertible 32cc
Try searspartsdirect.com You'll need the model number... plug it in and you should be able to pull up a schematic.
1,996 views
Usually answered in minutes!
×