2003 GTX-Di

[vicky]

took ski to shop month ago ski would not run over 30mph and was missing (stumbling)when you first got on it ,then it would run to 30 mph.They put it on the laptop at the dealership said everthing looked good so we took it to the water it would not tac over 5100rpm there was still plenty of throttle left but you can squezze the throttle and no gain.We put new plugs in it before we did any testing.Fuel was check for water.\,propellar and shaft checked.Since i took it we did replace the exhaust and cone pipe had a hole in bottom ,engine mounts,$1500 ski still in shop not fixed and im supposed to take it on vacation end of this week im no longer think the dealership got a clue.......... Help please