1996 Sea Doo SP turns over but will not start?

[Namognom]

Started a few weeks ago and ran well. Since then I trailered about 30 miles and replaced with a new battery. Now, the engine turns over, but will not start. When I remove the plugs they're wet. I replaced the old plugs and have topped off the tank (from 4 to 6 gallons) in case the fuel had condensation. Plugs spark when the I take them out, though not the thick blue light that the service manual suggests.

Thanks for any help.