Honestly I'm not that familiar with your ski, check the fuel baffle, if it has a two wire connector, pink and black I believe, not too much trouble. You would need a gauge and some wire, [MENTION=41828]Minnetonka4me[/MENTION] can probably tell us more and he will also have the parts you will need. Oh, and if you have a fuel baffle with the gauge sending unit you will also need to replace the float with the newer molded type.
I thought your ski had a multi-gauge with an led indicator for fuel. Does it have a single gauge hood? What gauge(s) does it have now?
Lou