Ok if you are running a charcoal fueled system; here is one of the engines I recommend for small engine gasification. Do not wood fuel engines this small it dont work! Believe me if it worked I would have a system on market specific for this application. I sold those systems for 8 years; charcoal is by far better technology. Dont fall down that path you will regret it and wish you would have followed my advice. I am an actual developer where others on market are not they cant even show an engine run. Dont get duped into those systems they dont work.
Also If you are looking for an inverter generator to wood gas. Don't! Some things a small engine gasifier is not; a replacement for a gas tank nor it is a replacement for a solar system. If you are not using your system for power storage via battery bank. Stop! Wood gas primary power is not your solution, get off this sight and go shopping for a solar system, inverter and your battery system, you need at the very least the inverter and battery storage. You can always add solar panels later. But need to design that part of the system first, before even thinking about wood gasification. A wood fueled or charcoaled fueled power generator for full time primary power is not practical. You will never keep up with it and you wear that engine out in a heart beat, and it will not run stable to be usefull. This is for a back up to solar or emergency power outages. Fuel processing for either wood or charcoal then becomes viable. Full time you will get tired of this very fast and abondon this. Now the reason you dont want an inverter generator is; for one they are twice the price and second they are not needed. This is because you will be inputing into an inverter anyways. The inverter cleans up the generator power in pass thru mode and also converts to DC to charge the battery bank. You wont use eco mode either as you will want to pump the max output you can into the battery and shut the thing off. So the eco mode will be pointless to have.
The Lifan 459cc engine is going to be common on just about all off the shelf brand generators. This Predator, Duromax, Champion, WEN, and many more. If its states its a 459cc engine on the generator it more than likely is the Lifan engine.
Generators with this engine for small scale power back up is going to be the most ideal. Remember you do not get the same power from gasification as you do gasoline. You can achieve about half; and then you have to factor in fluxuations on stand alone systems so the machine can float. You are not using liguid fuels or gas fuels. You are running solid fuels and gasification is always subject to fuel flows that will create fluxuations.
One of the big features of this particular engine is it has a hydrolic oil pump. It is the only small engine in this size range that has this. This drastically improved engine longevity not even Honda has this. You dont want to woodgas an expensive Honda engine leave them be. Woodgas these lower cost units they can be rebuilt or can be expendable. Take that Honda back to the dealer with it smelling like wood gas; they will toss you out the door on your head!.
This is realistically the smallest engine you will want to go that will create usable power. Its really just a waste of money trying to use anything smaller and almost pointless. The 459cc engine puts out decent power and they run very stable. Our Predator that we have wood gassed has outlasted our other one that we did not wood gas. It has over 3000 hours on it and still chugging away.
This here is a fantastic deal at least at this time of this writing. This is a dual fuel Champion featureing this engine. For only 1200 bucks thats a pretty decent machine and Champion seems to be a decent company.
Also note: Those that get our CFX-RTR charcoal gasifier will get the engine adapter that fits all 420cc and 459cc engines.
https://www.amazon.com/gp/product/B0B7KQX34H/ref=pe_2313390_812188320_em_1p_0_lm?th=1
Awesome! How many hours would you say you have on your EG4 inverter with the 9500 and what EG4 inverter model do you have?