Do you have any of these symptoms on your Carbureted 2-stroke engine? 
– No response when applying throttle.
– Ski rev’s when out of the water but will not in the water.
– Bogging when going from idle to full throttle
– Surging of revs
– Intermittent or sudden cutting out of engine after planning off or applying full throttle.

You Probably have carburetor fuel delivery issues. For those of you with Seadoos made in the 1990s, you should expect to have some type of carb problems if you have the original gray fuel hoses. The hose breaks down internally and the residue accumulates in the filters.