Running too rich will be either the needle in the carb is leaking, or the muffler/spark arrestor is blocked with carbon, or the air filter is blocked, all assuming the carb screws have not been touched.
SOURCE: craftsman weedeater will not start
The most probable problem is no fuel delivery to the engine.
1. Check/replace the fuel in-tank filter, you should be able to easily blow through it once removed. The primer bulb will sink down and not return quickly if the filter is bad. Fuel will not return to the tank via the return line if the fuel filter doesn't allow fuel to be pulled in.
2. If fuel is returning to the fuel tank when the primer is pushed then your problem is inside the carb.
3. To verify this put a small quantity of gas in the lid of a water bottle (half full). And pour it into the carb throat. Replace the air filter to prevent a backfire from shooting flames out. Try to start the weedwacker. If it runs and then dies the problem is inside the carb.
4. If you are really good at working on things with small parts you can clean out the carb and replace all of the gaskets to solve the problem. If this isn't for you then you should take it to a lawn shop and have them clean the carb and replace the gaskets.
NOTE: Replacing the gaskets is very important because the gaskets get stiff and the fuel pump action of one of the gaskets is reduced or stopped.
Hope this helps, Karl
SOURCE: My echo srm 2100 weedeater will start, but when I
There are an array of things that could be wrong, but most likely this is a carburetion problem.
For starters, make sure the fuel lines are soft and there are no cracks or pinholes in them. They tend to break down after time. I don't know the age of this machine, but a gasket and diaghragm kit may bring it back to normal operation. The parts in this little kit are easy to install and not very expensive. Another issue of note is there is a very fine mesh screen inside the fuel pump chamber of the carburetor that traps dirt and foreign particles. It is easy to access and clean, once you have the pump cover off. The internal parts of the carburetor need to be soft and pliable like the fuel lines to operate correctly. They dry out after time and need replacing. All these little carbs have this issue at some point in their usage. If you remove the carb, gaskets and diaghragms, try spraying all the holes with carb cleaner aerosol spray after cleaning the fine mesh screen. If a good cleaning doesn't help, then you probably need the gasket and diaghragm kit for that carburetor.
SOURCE: Engine dies when excelerating - more gas
check the fuek lines for hole and leaks, check the fuel filter and clean if necessary. remove the carbuerator and inspect the gasket; it should be soft and flexible, if it seems hard or brittle replace it. clean the carb with carb cleaner sray (available at any local auto parts store) and compressed air. make sure you get inside the small fuel rail holes. if that doesn't work have the carb repaired at a service center or replaced.
SOURCE: craftsman 28cc gas weedeater gas line connections
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.
If you need further assistance, just let me know.
Jim
SOURCE: weedeater will not run with choke off
Check your carburettor mounting screws,they might be loose and it would mean the engine is
getting to much air and it would leak gas. Stephen
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