I am considering purchasing a late 90's model jet boat like a regal rush or a bayliner jazz. I like the style of those boats and am just wondering if there are any serious issues with the merc sport jet 90 and 120 engines and jetdrives I sould be wary of and or fixes I sould know about. Also are their known issues I should be aware of, such as part availability issues, fuel consumption, or problems to look for when purchasing. Please note that this boat will used by myself and my girlfriend, and my roomate and his girlfriend to tube, ski and fish on freshwater lakes. All four of us total weigh less than 600lbs and I have heard these boats are rated for 800. Not looking for anything really fast, just want to make sure this boat can perform to the usage I need it too. Thanks for all your advise in advance