If it has fresh fuel and good spark plugs with good spark it should fire up. Is the battery fully charged? you could put a little fuel with some injector oil in it and add it to the cylinders to get it to fire also. Have the carburetors been cleaned recently? Does it still have the GRAY fuel lines in it still. That might be a problem too as they deteriorate and clog the small internal filters in the carburetors. You might want to replace them with Black Fuel lines from like Auto Zone, and don't forget to replace the clamps too with small stainless steel ones while you at it. Give the carbs a good cleaning with compressed air and carb cleaner. Be careful not to damage or tear the diaphragms in the carbs or you need new rebuild kits. Put it back together and you'll be all set.
Do you have a seadoo shop manual? You could join as a "premium member". As a premium member you can down load a authentic seadoo manual from the seadoo manual library. In the library is a variety of manuals for almost all years and models. You can view as many as you like on line as a PDF file, or download it and print it for your personal and privet use. There are operator manuals and repair manuals for you to do your own repairs on your seadoo. The repair manuals have everything from troubleshooting, repair procedures to winterizing. It contains wire diagrams torque specs and pictures for disassemble and assemble instructions. In the spec sheets it tells everything needed to maintain oil changes, spark plug gaps, carburetor rebuilds and impeller wear ring tolerances. Click on the "Seadoo Manuals" link at the top of the page for more details. If you need any help or get in a jam, we are always here to answer your questions too. Premium members get priority when it comes to getting quick detailed answers.
Keep us posted on your progress.
Karl
