Unit is a Troy Built 32 cc 2-cycle. I can only keep it running with the choke partially to mostly closed. Have done the standard stuff (cleaned & rebuilt carb, new spark plug, clean air filter, new fuel lines, cleaned fuel filter, cleaned muffler screen, new fuel). Checked compression @ about 95-100 psi which seemed about right but not sure. Suspect ignition coil which checked as follows: Plug wire to Grd: 2.4 K ohms. Plug wire to positive terminal: 3.0 K ohms. Positive terminal to Grd: 0.78 K ohms. Unit initially would show problem until it ran awhile but now its continuous. Checked cylinder also: Cylinder and cylinder wall and two cylinder rings look OK. Focusing on ignition coil but sure could use some input from the Forum.