Starts on full choke but stalls when moved to 1/2 - can play with it to keep ig going for a min or two but dies out.
When you go from full choke (rich air/fuel mixture in carb) to half-choke (leaner air/fuel mixture), you are requesting the engine to do more with less. This is a very common problem. You say it dies out. It is probably at that point dying out "lean" with a lot of air and not very much fuel. Several things can cause it to die out. Bad fuel filter in gas tank, debris in the carburetor fuel inlet screen (small wire mesh filter)...or it could just need the L mixture screw adjusted which afftects how rich/lean the engine is at startup. Since it is dying lean, I suggest turning the L (Low speed) mixture screw counterclockwise to increase fuel flow at startup. Turn it about 1/4 of a turn. If this allows it to keep running, then good. The L and H mixture screws have unconventional heads on them that require a special tool, but you can make your own with a small 22 gauge automotive-type female spade connector. Just tap it down onto the head of the L screw (one closest to engine below the idle speed screw) insert a flat blade screwdriver, and you should be able to turn it. If adjustment does NOT help the dying problem, then the installation of a gasket and diaphragm kit is probably the next step. Good luck, and you are not alone, there are hundreds of these machines that do this.
Aug 14, 2011 |