Hard one....
Your asking a really hard question here because your having a tough time deciding..........surely because of the investment cost. If you buy the 04 and take it out and 4 hours on the clock, the supercharger blows, then your out some pretty good, hard cash to get it repaired.
But now, if you get the new one with a warranty, no hours on it, then you think your gonna be takin care of a bit better. That isn't always the case. There was one member who bought new from a boat show, found out the thing had like 8 hours run time already on it. It was suppose to be a crated ski. He even said there were scuff marks on it..........
There are a lot of Seadoos out there and there are several different size motors. I'm going to throw this out there and I mean no dis-respect to the world of Sea-Doo, but I'd never buy the supercharged ski.
This ski has the top of the line engine in it with the best electronic control system ever designed. The redundancies of one system checking the other is just unbelievable. The automatic adjustments made by the ECM (electronic control module) are just awesome. But for me, the 787cc, 110 hp engine, with it's simple block, pistons and natural aspiration is the least troublesome motor that Rotax has ever designed. Every year, there is always, "lets make this with a different stroke, it'll be faster" kinda mentality, that you wonder where it will quit. The Coast Guard has a cap on the speed of PWC watercraft, due to safety (unless your a bonified racer). So, with the 947cc RFI engines already doing that speed, all the newer ones are doing is getting you there faster. Like a computer. The one that came out last year was top of the line, well, this year, it's crap.:rant:
To get back on the subject. The 04 Ski looks nice, there doesn't appear to be many hours on it and honestly, you can't break one from riding it. Now, if you see signs of it being beached or dings and body damage, then you may have cause for concern. If there is or has been any problems with this ski, it will be recorded in the memory, where you'd be able to find out what kind of work has had to be done.
Pull the dipstick, smell the oil on it. Does it look and smell clean. Then he's changing the oil and maintenance is probably being performed.