Rob,
Although I am not familiar with a '98 Nautique, if the layout is similar to a 99 or 2000 then your answer is NO. Our bags can fill up to 1000 lbs., however very few boats on the market have a large enough ski locker to hold that kind of weight.
To get the most weight into your ski locker you should take a measurement of the parameters inside the locker then chose a bag that best fits. There are plenty of manufacturers who offer a wide range of sizes and there are even some who make custom sizes.
Rob, it is not our intention to falsely advertise or to fool customers....that is not the way we conduct business. We apologize if we have misguided you or anyone else.
FYI, we do have a very limited sizing chart (
http://www.fluidconcepts.net/Pages/ballast/ballast_applications.htm) on our website. Of course, Rob, your boat is not listed.
Look for a more extensive list next spring.
Jerry Lembas
Fluid Concepts
www.fluidconcepts.net