My S22 has 420 and is in real nice shape. Engine looks new although there are a few bolt/nuts specifically around the tranny mount and v-drive mount that have a bit of cosmetic rust. Engine should idle very very smooth, if not, a set of plug would probably fix. There are two different hour meters - one within the menus on the Message Center, one on the Tech. In mine, the tach is correct and the Message Center is lower because they had reprogrammed the computer which apparently resets the Message Center hour meter. Really, except for those couple cosmetic rust spots, the engine looks shiny, black and new.
I have some evidence that the cushions may be getting a bit tired. The aft corners seem to take a beating and if you spread the seams you can see they're not too far from going sideways. However, they've been like that for many years, so we'll see.
The only other ugly is that I'm seeing discoloration in some of the gelcoat locally. Specifically, I see a yellowed patach around each of the lift loops on the transom, as well as some areas on the forward lower chines. You won't see it from a distance, but it's annoying because relatively new, clearly not something that I caused, and all things gelcoat are tough to fix.
Does it idle nice? Best way to check is to drop it in reverse - it's louder and makes it easier to hear any bounce.
Ask about maintenance, including what fluids, impeller, fuel/water separator at what frequency.
I love my ride, let me tell you. Its style is getting a bit dated compared to the big wakeboats nowadays, but the thing's still so clean and so classic that I never cease to get comments. The best one this year was "Dude, you have a very nice boat there" - and it wasn't like he was getting ready to boat-jack. Home Depot parking lot. Always lots of interest as to the TOYOTA.
Everybody comments on the comfort oand roominess of the boat (some of that is my giant "porch" bimini).
