[TXS V20]

Hey guys I got the lower unit separated from the upper (with a lot of oil coming out). Got the impeller housing off without any problems. After prying like crazy and getting a dremel tool to finally cut the old impeller off the shaft. The impeller on the original 470 has a brass hub. Does the replacement have to be a brass hub? The kit I bought at the dealer (after looking up serial #s) doesn't seem like its brass-more of a fiber core. I haven't had a chance to clean the shaft yet so I don't want to force it on - but it seems like the correct ID.