I've been a boat owner for 36 years. Owned lots of different boats. Grew up around them and taking care of them. I bought a brand new Larson with a Volvo/Penta 5.7 GSI in 2003. I have yet to go through an entire summer without a breakdown of some kind. Computer pack failed 4 years ago. Engine failed 2 years ago with a head-gasket failure and valve damage. I don't pull tubes or skiers. Engine is always run between 3000 and 3400 rpm when up on plane, and that's usually rare. First engine failure occurred at 370 hours. Now, the engine has failed again at 500 hours. This time, it's more serious. The engine has, apparently, siezed up. The first time the engine blew, the service technician said that the boat is "over-propped". This means that the wrong propeller was installed on the boat. I called Larson. (They're USELESS when you talk to them on the phone). Larson blamed Volvo for the error. When I called Volvo, they blamed Larson. Back and forth it went. It cost me $5000 to get things "right". It's now 2 years and a little more than 100 hours of running time later, and I have my second engine failure. The technician in tearing down the engine to find the root cause. In my opinion, if this is engine is just a "lemon", I should be compensated by Volvo, warrenty or no warrenty. (Warrenty's, extended or not, don't cover much anyway). If engine failure is a pretty common occurrance with this model, then there should be a a class action lawsuit formed as soon as possible. I'm not giving up on this without a fight. Anyone who reads this can comment. I don't need sympathy. Just some advice, information, or help on what to do would be nice. Thanks to all.