I have a 1998 Seadoo GTS, I have rebuilt the carb and cleaned it. It runs great no problems what so ever. The only thing is, when it has been run for a while, I stop for 3-4 mins, go to hit the start button you have to bump the throttle to get it idling, after that it idles just fine.My 1999 GTS, you just hit the start button and it starts and idles perfect waiting the same amount of time. Does anyone know why my other one stumbles a bit? (pop-off pressure? I never did check that) the carb is set to factory manual specs. Any help would be great.