seadoo XP not sucking fuel

[lucasXP800]

Hey guys looking for some advice on a 1996 Seadoo XP 800 that had been sitting for a few years, I bought it with 135 psi compression on the PTO side and 150 mag side. I put fresh mixed gas in it and took it out on the lake, it started perfect i rode it for five minutes and it ran perfect I brought it back out a week later it had trouble starting then when it did it died after five minutes. I rebuilt the carbs, replaced the rotary valve (timed it with a timing wheel), top end rebuild as the PTO side blew up, and put oil injection back on it. Although now it’s not sucking fuel, it’s blowing air back out of the fuel line. I’m thinking it’s a bad crank seal? Please let me know if anyone has any idea of what it might be thanks

 

[mathiupa]

Hola. Puedes hacer un vídeo de tu problema?

 

[burtshaver2021]

When you rebuilt the carb did you test to see if the needle was closed? And that it was not held open. 10 pounds for that test. Did you test to see if the fuel pump would hold pressure? Try those tests, super great carb rebuild thread in here, on @mikidymac profile. Also where did you purchase the carb rebuild kit from? What brand? Black automotive fuel lines? Or clear lines? Did you replace the fuel selector for valve? How about the prong in the fuel filter? Had it been changed or tested. I doubt this is a crank seal. That wouldn’t cause air in the fuel system. Also double check that the fuel lines are routed correctly, they are all labelled

 

[mikidymac]

If it is blowing air out of the fuel line it sounds like you might have the pulse line connected to the wrong fitting.

 

[lucasXP800]

I bought a cheap rebuild kit, I’m buying a genuine oem one and doing it over again. All the hose are connected the same as before when it was running too. Also all black fuel lines it was being run mixed by the old owner I just put injection back in it, will do the pop off test tonight too. I thought it was a rear crank seal because even after the top end rebuild the rear cylinder has a bit less compression. The pto side is also the side that blew up in the first place, thanks for the advice I’ll work on it tonight and let you guys know

 

[tobytd]

I wouldn’t think that a crank seal would lower compression in one cylinder. Correctly rebuilt (fresh bore new pistons and rings) should have equal compression. Squirt some soapy water on the crank seal and crank the engine.