93 GTX Shuts Down Over Time

[wchwsky]

Good Day to all,
I really hope I can get some solid help here. I have a low hour 1993 GTX 580cc. The PWC runs great at first, then it tends to die after 4 hrs of intermitten use throughout the day. As the day goes on, the period of use before it dies gets shorter. After it dies the first time, I let it sit for a period, then it will run about an hour before it dies. I can't seem to get a solid answer to the problem. We enjoy the fun the GTX provides, so I'd like to fix this issue. Anyone Help?

 

[seadooya]

carbs, new spark plugs, clip plug wires, replace grey fuel lines, clean/replace selecotr valve, clean/replace cables/grounds...

 

[Bills86e]

Describe what the plugs look like after it shuts down. Look at the oil lines from pump to RV spigots, are they wet?