Been looking thru the details on this picture:
My suggestions and remarks:
1: Modify the gas hose from the gasifier to the generator, nominal size DN25
2: Your blower is able to create vacuum to produce gas, thru your gasifier, but your vacuum needed is high since you have rice husks and small material as fuel., try to have your blower, or a second one , near the end of the hose towards your generator.
3: install a vacuum gauge on the outlet of your gasifier, to measure / compare the gasflow
Turndown ratio, aka the ratio in your gasifier between minimum and maximum, is very sensitive, AND the small generator even more... So, maker sure that your blower meets the quantity at the same level as your engine would ask @WOT, to compare flare / gas quality.
Many builds do get a great flare, with an heavy blower, but starve down on the lesser vacuum from the engine.
Rule of thinking: smaller is more difficult to balance then big... ( air/gas mixture against power output/ starting capability )
Start your testing with running your generator on gasoline first untill warmed up, then switch to the use of the gasifier/ starting with the gasifier
If your engine does run, it doesn't mean that power would be available, put a dimmer between a resistive load and a watt meter, this to check on your power outlet.
Use a step by step approach and observe every single outcome,
My few cents to your nice build...