So I took my jetski out this weekend and it ran great for about 2 hours/half a tank of gas. My friend then got on it for about 3 minutes and came back to the dock, turned it off. I got to get on and the thing would not start again...would turn over but would not start. Loaded the ski up and took the carb cover off once I got home and poured gas down the carb and it started right up, turned it off and started about 3 or 4 more times. Went out the next day to go back out to the lake and it would not start again so I poured gas down the carb again but nothing this time. Took the carb off and cleaned it but there was nothing in it and it was really clean...Any suggestions of what could be wrong?