Hi. I splashed my jet ski this weekend for the first time in a year and a half. It was running really rough. I figured it was old gas so I took the old stuff out and put new stuff in and also changed the plugs. After that it started right up and ran like a champ. I took it back to shore and shut it off, then tried to start it again and it took about 5 minutes for me to get it started. It ran great for 10 minutes then I brought it back. I tried to start it again and it won't start. It feels a bit like its starved for gas because if I hold the starter, it will fire once about every five seconds but won't start. Any ideas if what's wrong? Thanks.