wldarden

Problem with my jet ski. Sat very little used for last season. I went to start it up and turned over very slowly. Thought it was a bad battery so replaced with new. Sae problem but heard "presure sounds" within the engine after the start attempts. Removed the sparkplugs and engine turned over very well and lots of fuel and oil ejected though the sparkplug holes. Reseated the sparkplugs and had same problem--Engine is locking up with pressure. Anyone know where I should start to solve this problem? Thanks.