Re: looking to buy a 2002 crownline 242
5.7 huh? yeah that is on the low end for a 242 Crownline, but if you get it for a good price and the boat is worth it you could up power it if you are interested.
It will handle moderate sea states fine but anything more then 3' and your not going to be having any fun, I have been in 4' waves with 6' max and I wasn't happy at all, but I was on lake powell which simply cannot get as big of water as the great lakes can, you just have to learn to pay attention to the weather and be smart about boating.
as for the Boat itself, provided it has been cared for properly the boat should serve you well and make you a proud Captain.
Would I keep looking? yes, but only because of the motor, I am a Crownline guy so I am biased, I love the brand, I have zero desire to get another boat from another manufacturer, Quality, fit and finish, Performance I have never been disappointed with Crownlines.
BUT, the most important thing to remember is that the boat has had to have been cared for properly, first and foremost.