I got a little further today. It spluttered for maybe 15 seconds. The routine in this video happened several times. I found a sweet spot with the air valve - At least I found a spot where it was worst above and below it. But it wasn’t sweet enough. It just spluttered. It was like you wanted to nudge the gas pedal, but there is no gas pedal, just the air adjustment.
I thought old charcoal or ashes might be plugging up the system. After the previous session, I just let it suffocate itself to go out, so there was a lot of charcoal left in it when I started, and I didn’t check what it was like in the reduction tube. Maybe clogged up? I’ll check before the next run.
My charcoal size was 1/8" up to 7/8", but maybe I should try 1/8" up to 1/2" next time?
Maybe this little engine can’t provide enough suction for fast enough air speed, even with the six nozzles reduced to 19/64" diameter.
Maybe the gas would work better if it went into the carb through the port where the propane goes, rather than being mixed with the air first and going in with the air.
I really appreciate your ideas, especially Dave’s suggestion to use my drill instead of pulling the rope!
Steve, I am pushing the gas to the generator (rather than pulling it as you do). So in my case, the engine has to suck the gas through the blower, which maybe is too much resistance, but I didn’t think that would be a big deal. Is it?
Carl, I have considerably reduced the length of the hose, from 11 feet down to about 4 feet. Seems to have helped a lot.
The whole gasifier is quite massive and it takes a long time to get hot. Like last time, it got up to about 600°C at a point just after the reduction tube, but it took about 2 hours. How long after lighting up should you wait to start your engine?
Despite all the problems, it was nice to hear it splutter for the first time - At least there is some hope!