Re: 1998 Kawasaki Jetski zxi sank, Help!
first off...RUN it on the hose.
Try new plugs...I've seen new plugs out of the box be bad...gapped correctly too.
So after you took the video of running bad, you now have NO spark. If none, then check the coil.
If you have spark, try trimming a 1/4 inch off the plug wire and reattaching the boot. This may get you better spark.
If you ran it this yr already once, check the gas and maybe the suction tube, it may be blocked with debris from the tank.