I have a 96 XP that runs great most of the time. Sometines when you take it out and start it it will idle just fine but when you go to give it throttle it will shudder and shake a little bit. When it does this the ski will not go more than 10 mph and will just not rev out of it. Typically you have to shut the ski off and I will usually pull the DSS and re start the ski. I have had to do this as many as 4 time and then it will run completely normal. Any ideas? Thanks.