I'm new to this forum. Just joined today. Not sure about whether or not the engine would work but I've seen allot of different engines being put in the 1816 on YouTube. Even saw one person put a ego metro engine in it. I guess what I'm saying is just about anything can be engineered to work. Just depends on how much modification you want to do. I have a Harbor Freight (predator) engine I've used in a gocart. Knock on wood it runs great and starts perfect even after sitting all winter without being started. If the 22 hp fits with minor modifications I would have no problem trying it.