92 Seadoo GTX Check Valve Question

[seaduuude]

I have a 92 GTX with the 587cc motor. It starts and runs great, for about 15 minutes, then it bogs..then full acceleration...then bogs...then full acceleration. This cycle continues. After I stop it for awhile, it starts and runs great again..for 15 minutes...then the same thing. It is like it is starving for fuel. Carbs were professionally rebuilt and new plugs recently, all the Gray fuel line is gone and replaced with good line. Could I be creating a vacuum in the fuel tank due to bad check valves? Any suggestions? I ordered new check valves and a new fuel filter today just for the hell of it.

 

[Rabid]

If you remove the gas cap do you hear anything,Air escaping or sucking in?

 

[seaduuude]

If you remove the gas cap do you hear anything,Air escaping or sucking in?

No sound when I open the gas cap.

 

[Migliacars]

It's your coils or ht leads.

 

[RodInEscondido]

Same when selecting normal or reserve?
I have found it to be helpful to detect fuel flow restrictions or leaking (air) by hooking a brake bleeder/vacuum tester to the line that feeds the carb.
Outside chance is pulse line or fuel pump.
As mentioned above, cutting back about 1/4 inch of lead at plugs to give fresh connection.

 

[seaduuude]

It's your coils or ht leads.

Can you clarify coils or ht leads??? It starts up fine, in fact I just started it about 5 minutes ago.

 

[seaduuude]

I have not tried reserve, but I guess I should. As for the leads, I can try that as well. Is the fuel pump inside the carbs?

 

[RodInEscondido]

The fuel pump is in the first (or only) carb
The second line from the engine block to the fuel pump is the pulse line that makes the fuel pump work; if it leaks the fuel pump does not work or is less effective.