Engine bogs down and shuts off at full throttle

[k_24]

I have a 02 seadoo xp 957
Wen it sits for more than 10 min wen i start it and give it a full throttle the motor bogs down ans shuts off
I have to play with the throttle at 2500 rpm for few mind to get it to punch

Can anyone tell me in detail whats going on ?

 

[Bowhunter252]

Leaking needle and seat?

 

[mikidymac]

I can tell you if you keep doing that you will probably damage the engine.

I agree with Bow hunter in that it is probably a leaking needle and seat. I would also make sure your accelerator pump works and your gas tank holds pressure.

 

[k_24]

I can tell you if you keep doing that you will probably damage the engine.

I agree with Bow hunter in that it is probably a leaking needle and seat. I would also make sure your accelerator pump works and your gas tank holds pressure.

I never rebuilt the acc pump wen i did the carbs
Also how do i check for leaking needle and seat ? I did the pop off pressure test and it was to spec wen i rebuilt the carbs or is that something different ?

 

[mikidymac]

You need to make sure the accelerator pump is squirting into the top of bot carbs.

After you put the carbs back together you make sure they can hold 10 psi without leaking.

 

[k_24]

You need to make sure the accelerator pump is squirting into the top of bot carbs.

After you put the carbs back together you make sure they can hold 10 psi without leaking.

How do i check ?

 

[Prosideus]

Mine was caused by failing fuel lines with cracks. Air was causing the bogging and I could feather it on the top end to get up to speed, but no responsiveness. Make sure you hoses are not cracking around the hose nipples.

 

[k_24]

Mine was caused by failing fuel lines with cracks. Air was causing the bogging and I could feather it on the top end to get up to speed, but no responsiveness. Make sure you hoses are not cracking around the hose nipples.

Im good once it punches after few minutes of playin with the throttle

 

[k_24]

You need to make sure the accelerator pump is squirting into the top of bot carbs.

After you put the carbs back together you make sure they can hold 10 psi without leaking.

How do i perform the pressure test ? Is it the same as pop off test ?

 

[mikidymac]

No, with the carb back together you plug the return fitting and pump 10 psi into the inlet. It should hold 10 psi forever, this is to make sure your needle and seat isn't leaking and flooding the engine.

 

[k_24]

No, with the carb back together you plug the return fitting and pump 10 psi into the inlet. It should hold 10 psi forever, this is to make sure your needle and seat isn't leaking and flooding the engine.

Can i do it while its still on the motor ?
And shud i block any other inlets ?

 

[Chester]

You're running lean, test the accelerator pump.

Chester

 

[k_24]

No, with the carb back together you plug the return fitting and pump 10 psi into the inlet. It should hold 10 psi forever, this is to make sure your needle and seat isn't leaking and flooding the engine.

 

[k_24]

I checked both carbs and they are holding 10 psi

 

[k_24]

No, with the carb back together you plug the return fitting and pump 10 psi into the inlet. It should hold 10 psi forever, this is to make sure your needle and seat isn't leaking and flooding the engine.

View attachment 35626View attachment 35627

The acc pump is holding 4psi too

 

[k_24]

What do i do now ?

 

[k_24]

I pluged it into fuel inlet

 

[Chester]

Does the accelerator pump squirt fuel into both carbs properly?

Chester

 

[k_24]

Does the accelerator pump squirt fuel into both carbs properly?

Chester

Nvm i checked and the carb is leaking wen i pump 10 psi into return fitting. im replacing both needle and seat


The fuel pump seems fine
Squirts into both at the same time

 

[79MKII]

Any updates? I'm having a similar problem. Should the carb hold pressure when pumping into the return fitting or just the inlet?

 

[k_24]

Any updates? I'm having a similar problem. Should the carb hold pressure when pumping into the return fitting or just the inlet?

Didnt get a chance to check yet