The manufacturers seem to recommend that you make the idle richer than it would be to give the best idle quality, because of that problem. I suggest you try readjusting the idle mixture (low speed mixture screw). Recheck that what you have gives the best-quality, fastest idle, then turn the screw anticlockwise up to an eighth of a turn, speeding up the idle when you do it so it runs fairly smoothly (though it will be four-stroking). The clutch may not disengage, because the speed will have to be a bit higher than before to keep it running stably with the rich mixture. Then run it flat out and adjust the high speed mixture for the fastest speed, then turn it anticlockwise until it just starts to four-stroke. That makes it a bit rich on the slow-down when you release the throttle, and gives it some chance of not stalling.
Welcome to the world of two stroke brushcutters.
I started from scratch and turned the "L and H" to seat gently and then turned the "L" anticlockwise one and a quarter back and the "H" one full turn anticlockwise. Believe it or not (i said) the thing kept running for about five minutes without revving and stopping. I restarted it three times and it jumped into life and kept running. The cutter head doesn`t stay still all the time and i adjusted the "L" screw a little and didn`t do much with the 'H" screw. I really don`t know what i did,
but everything crossed, i hope it keeps working. I`ll try it again later and
keep you posted.
