Sometimes being polite can get you rediculed! Deere drop the 91XX so there's no 9130 to replace the 9120. So the next size is 9230 which has the smaller engine than a 9220. Do the research and figure it out for yourself. I'm just trying to help the guy out. Apperently he didn't know. Do you think I know why Deere did this? Like I stated (Deere likes to switch things it can be hard to keep up sometimes). Don't you think a 9230 should have at least the same size or bigger engine than a 9220? I don't understand why you need an explantion on who switches things up? At this point it really doesn't matter anyway!