I was riding my tigershark on day last year and i noticed that whenever I applied throttle past 25% it would start to choke on the added gas. I brought it home and after taking the carb apart and found no problems there. The problem is fuel delivery, somewhere along the line the fuel isnt getting to the cylinder. I just got it to start by dripping gasoline into the carb but my question is; does this jetski have a fuel pump? or is the gas pulled in by the vacuum generated by the piston? Any other ideas would be a big help.