1996 seadoo won't start

[rjbierman]

My 1996 Seadoo xp starts when cold but after exchanging a couple riders it gets harder to start. Eventually it just turns over and doesn't start. If you then wait a few hours it will start again. What could be the problem?

 

[timmyboy76]

wats the compression?

 

[darter1585]

1996 Seado won't start

I just experienced a similar problem with a '96 SPI. I recently replaced all of the fuel lines, and noticed that when I pulled the vent line it seemed to release some built up pressure. When I began experiencing the problem of not starting after it had been run for a while, I pulled the vent line where it vents through the hull. I removed the one-way valve, which I assume is designed to prevent water from entering the line. It was completely blocked. The ski ran fine after it was allowed to vent, but I probably shouldn't let it continue to vent inside the hull. Has anyone else run into this?

 

[bigbaldbob]

I just experienced a similar problem with a '96 SPI. I recently replaced all of the fuel lines, and noticed that when I pulled the vent line it seemed to release some built up pressure. When I began experiencing the problem of not starting after it had been run for a while, I pulled the vent line where it vents through the hull. I removed the one-way valve, which I assume is designed to prevent water from entering the line. It was completely blocked. The ski ran fine after it was allowed to vent, but I probably shouldn't let it continue to vent inside the hull. Has anyone else run into this?

Not sure that was a good Idea. check valve going thru hull is for positve presure.

 

[darter1585]

Not sure that was a good Idea. check valve going thru hull is for positve presure.

You'll have to excuse my ignorance, but what does that mean?

 

[bigbaldbob]

I may be wrong, but it is my understanding you have too check valves the one lower on the hull will only allow pressure to only go out. The valve closer to the sterring wheel allows air to come in to the system. if you remove the possitive valve you could possible allow contaminates to enter gas tank and more venting than is needed. The positive valve is set at a high psi before it will open (very hard to blow thru by mouth) The upper valve will allow air into system at less psi. Thats just my oppinion Do what ever works best for you and have fun on the water.

 

[darter1585]

Thanks. That does make sense. It leaves me still wondering what is going on with my fuel system, but I'll sort it out eventually.

 

[All Things Custom]

My experience tells me you have a leaking needle and seat. when you turn the ski off, fuel is leaking into the intake from the pressure remaining in the fuel system.

You can do 2 things to diagnose this....

1) as soon as you stop the ski loosen the gas cap to release pressure.

2) when you go to start the ski the second or third time for the day DO NOT give it any gas... it will crank for a second and should fire.

Or you can pull the air box and look into the carb with a flashlight when you shut it off, you will see small drips of gas. and depending how hot the motor is may even hear the drips.