Well this is now day 2 of running the gasifier to where its producing about 90-98% of my power. This is since I fully automated it, I installed the grate shaker on Sunday. With this and the hopper shaker I dont even need the electronic mixture controller, I know where it runs best those two things keep it in check. When there is a problem I then know its either out of fuel or ash chamber is full. Im burning through around 60 lbs pr day running it around 12 to 14 hours pr day. So fuel consumption is something like 4.6 lbs pr hour. (on average Im pulling 1800 watts minimum) going to tune the grate shaker down a bit it is a bit agresive I think. This should reduce fuel consumption while producing cleaner gas. It is producing some tar; I get around 1/4 cup every 3-4 hours coming out the dryer. That dryer is doing a good job, its that much tar it has yanked out of the gas stream that otherwise would have been sucked into the engine. So I do a quick gasoline run periodically, if Im shutting down Ill switch it over to gas while I shut down the machine. Then Ill give it a minute and then shut of the supply valve. So no more than a 5 minute washing here and there. The only other time is when I need to run the CNC machine, Ill switch it over run my parts and then right back to wood gas.
So besides work this machine is also running my RV, my morning coffee is made on wood gas, all my meals are made and prepared from it. I run one thing at a time, but I can run a microwave, electric griddle, fry cooker, toaster. Food is kept cold or frozen thanks to the gasser as well. Even though I buy my fuel my time is worth something as well.
So I have a new hearth bowl on order, to take the restriction down to 1 1/2". When I install that I plan to put back in the 1/8" jetting and weld in some inspection ports to the jets. I dont think Im going to have an issue with the 1/4" jets, once the machine gets warmed up I think they clear out on there own if there is any blockage in them.
If you small engine guys are experiencing a good running machine and then a sudden change in performance. This maybe your issue, check your jets and see if they are clogged up!!