Just out of curiousity, l tryed the automixer once more yesterday. To much of my surprice, the motor run! And more, it run great! I went for a drive, all run so well. Steady idle, good power.
What realy surpriced me was the usefull range of the throtle expanded drasticly. Runing a manual fixed air seting, l usualy set the a/f ratio for best power at WOT. But, at any other position, the AF ratio is slihtly off. O2 sensor showed this too. This means at say 1/4 throtle the af ratio is off, the burn not efficiant as it culd be, and you are forced to press the pedal more.
In practice, my drive performance looked like this; at TB closed, engine idles. Tb 0-75% there is some power but quite useless. Tb 75-100%, engine pulls strong.
But not with a automixer. The tb opening vs power output is much more linear.
Anyway, joy didnt last long, coming jome from 5 mile roundtrip l wanted to make a video, but the engine refused to run at all. I saw there is wery litle hopper vacuum, looked at the filter and it was plugged again (cleaned 5 miles ago). This confirms my suspicion l have a cooler full of dust and it just dumps it in the filter. Time for a cleanout.
Allso, what l noticed, with a manual fixed air setting, after a short stop, l can restart the motor right away on old gas. Automixer doesent start it at all! I need to start on petrol then swich to wooodgas.